Post on 16-Jun-2018
transcript
general description
GENERAL
The EICO Model HF-81 is a complete high fidelity stereophonic control center and a pair of 14watt amplifiers, allon one chassis. With it you can select preamplify, andcontrol accurately any stereophonic source (tape, discs, orbroadcasts) and feed it through the self-contained dual 14watt amplifiers to a stereo pair of speaker systems. Whenyou playa monophonic source, the 14 watts available perchanneIadds up to a total of 28 watts for your two speakersystems. If you desire, both amplifiers can be connectedin parallel and driven byone preampIifier-control sectionwhile the other preampl ifier-control section is free to drivean external power amplifier. In this way your old amplifier can be put to use in a stereophonic system. Construction is of the "low silhouette" type that permits you todispense with cabinetry if desired.
FEATURES
1. Separate low level input in each channel for mag.phono, tape head, and microphone. Circuitry carefullydesigned to provide the high gain required by tape headsand high quality, lowoutput mag. cartridges without humand noise problems. A front panel switch permits choiceof the proper NARTB tape head equalization for either7 1/2 & 15 or 3 3/4ips tape speeds.
2. Separate high level inputs for AM, FM, and FMMultiplex. Also two auxiliary A inputs (one in each
1
MODEL HF-81
DUAL 14 WATT HI-FI
STEREO AMp·PREAMP
channel) and two auxiliary Binputs (one in each channel).
Inout Selector switch on front panel has positions for feednpur serecror swiren on rronr panel nas polil I lun::o lUI ."''''... -
ing FM tuner output to one channel and AM tuner toother, or FM tuner to one channel and FM Multiplexadapter output to other.
3. May be used as either two independent amplifierpreamplifiers,or one preamplifier-control section may beset free to operate an external power amplifier and theother preampl iFier-control section used to drive both internal power amplifiers connected in parallel at thespeaker connection terminals. A top - of-chassis sl ideswitch permits choice of operation .
4. Ganged level controls and a separate focus (balance)control.
5. Independent full-range bass and treble tone controlsin each channel. Tone controls of the low distortionvariable cross-over feedback type.
6. Identical Williamson type, push-pull EL84power amplifiers with high quality output transformers.
7. Hum balance control, panel-mounted fuse, pi lot lamp,convenience outlets.
8. EICO "low silhouette" construction employing horizontal chassis for proper layout and component separation.Easyconsole installation, if desired, with complete shielding and adapatability to any panel thickness.
Copyright © 1958 Electronic Instrument Company, Inc .
SPECIFICATIONS *
Output Power: 28 watts continuous; 56 watts peak.
1M Distortion (60c &7kc at 4: 1): 2% at 28 watts; 0.5%at 10 watts.
Frequency Response: (2w):I:O. 5db 10c to lOOkc.
HarmonicDistortion: 16 watts at less than 1% 30c to lOkc;20 watts at Iess than 1% 40 c to 10kc; 28 watts atless than 1% 50c to 5kc; 8.4 watts at less than2% at 20c.
Transient Response: excellent square wave reproduction(4usec rise time) negligible ringing, rapid settl ingon 10kc square wave.
Transient Distortion (60 cps tone burst): less than 1% atfull power.
Inverse Feedback: 20db
Stability Margin: 12db
Damping Factor: above 8,20 cps - 15kc,
Sensitivity (input for rated output): mag. phono 4mv;tape head 7.5 ips - 2 mv; tape head 3.75 ips 3.5mv; mic - 6mv; tuners, auxiliaries - 0.5V.
2
** Hum &Noise Level (below rated output): mag. phono 60db; tape head - 51 db; mic - 57 db; tuners, auxll iaries - 75 db.
Tone Control Range: ±15db at 50c and 10kc.
Speaker Connections: 4,8, and 16 ohms.
Tubes: 4 - ECC83/12AX7, 2 - ECC82/12AU7, 4- EL84,2 - EZ81.
Size: 15" wide, 4 3/4" high, 10 1/2" deep.
Weight: 241bs.
* Where power output is involved, figures are given fortwo channels combined; divide power output figures bytwo for specifications of each channel alone. Designproperty specifications refer, of course, to either or bothchannels.
** Measured with tone controls set "flat", LEVEL controlmaximum, and FOCUS control set for maximum gain inchanne I checked.
mechanical installation
GENERAL
a) HEAT DISSIPATION(VENTILATION): In common withother electronic equipment, the HF-81 produces considerable heat in normal operation. Unless continuous and adequate air flow isobtained around the heat producing elements, these elements will over-heat and their useful lifewill be greatly curtailed.
It is useful to understand the process of convection whereby heat is removed in judging the suitability of a location.Air heated by the heat-producing elements expands andrises; cool air is drawn from beneath to take the place ofthe heated air. In this manner, a stream of air is set inmotion which continually removes heat from the amplifier. (In particular, we are mainly concerned with themajor heat-producing elements; the four EL84 output tubesand the two EZ81 rectifier tubes.) If there is any impediment to or constriction of the airflow, the essential processof heat removal will be adversely affected.
Adequate ventilation will be provided if the amplifier isinstalled in an open-back console provided that the topof the amplifier is spaced at least two inches below anyshelf mounted above it. If the cabinet is enclosed at therear, provide several large holes or slots as low down andas high up in the cabinet back as possible. As an alternate, holes may be provided in the sides, bottom, or topof the cabinet. The important thing to remember is that
~ff~~ti~e ve~tiiation requires provis~n for cooi air to enter at the bottom and hot air to leave at the top.
]f the amplifier is not installed in a console, it may besituated on an open surface or on a shelf of a bookccse,Four rubber feet are also provided so that the amplifier willnot mar the surface of furniture on which it is placed.
b) EASY ACCESS TO CONTROLS: Mount the amplifierat a height which will permit easy manipulation of the controls. Tuner controls should be located nearby.
c) ACCESSIBILITY TO PARTS:. Tubes are the most frequently replaced items in electronic equipment. If theamplifier is installed in a console, sufficient space shouldbe alloted to reach and remove any tube in the amplifier.Furthermore, input and output terminals of the amplifiershould be accessible to permit easy interchanging of system components for comparison, and connection or disconnection of a portable tape recorder which is stored away when not in use. If antennas are strung around theback of the console in which the amplifier is installed,arrange them so they will not interfere with access to theamplifier.
d) ACOUSTICAL ISOLATION: If amplifier and speakerare installed in the same cabinet (not recommended), provide sufficient separation to minimize mechanical speakervibration reaching the amplifier. The minimum separationis about one foot.
3
CONSOLE MOUNTING
a) 0 erations on console front anel reI iminar to am Iifier mounting: 1 Tape the panel template provided tothe face of the console so that the top of the mounting surface line on the template is level with the top of theamplifier mounting shelf. Note: When shelf is not available, tape the template at any convenient spot on the faceof the console. (2) Use an awl or a nai I to pierce thecenters of the four extreme outer holes for mounting thecontrol plate)' to transfer their locations to the consolepanel beneath. (3) Trace out the rectangular cutout withan awl or nail and then pierce the centers of the four 1/2"holes)' one in each corner of the cutout. (4) Remove thepanel template. (5) Drill the four 1/2" holes in the console panel, one in each corner of the rectangular cutoutarea. Cut out the rectangular piece with a keyhole saw)'using the four 1/2" holes as starting holes.
b) Am Iifier mounting in console: (1) Pull off the controlknobs. 2 Remove the four screws that fasten the bezelto the side pieces and remove the bezel. {3} Remove thetwo screws and nuts that fasten the control plate to thebezel. The bezel is not used in console mounting. ~)
Fasten the control plate to the console panel with the two#4x3/8 wood screws supplied. (5) If the rubber feet havebeen inserted irwhe bottom plate)' remove them. (They maybe pried out with a thin screwdriver.) (6) Place the unit _on the mounting shelf and slide it forward until the slide
_ • __. ~ _1 t I I
switch support bracket is up against the panel and theslide switch accessible from the front; the control shaftsshould be approximately centered in the correspondingholes in the control plate. (7) With a sharp pencil, drawthe outl ine of the side and rear bottom edges on the chassisshelf. As the bottom plate falls short of the full width by3/16" on each side)' draw new side edge lines 3/16" inside the original side edge lines. (8) Now remove theknobs and take the chassis off the shelf. (9) Remove the6screws which fasten the bottom plate to the chassis. (10)Place the bottom plate exactly in the outl ine drawn on theshelf and mark the position of the center hole on the leftside and the center hole on the right side. (11) Removethe bottom plate and drill each of the marked holes on theshelf to a diameter of 1/4". (12) Refasten the bottomplate to the chassis, with the four of the six#8x3/8screwspreviously removed, using the two holes at the rear and thetwo holes at the front of the chassis. (13) Replace thechassis on the she lf, positioning it exactly in the outlinepreviously drawn, and restore the knobs. This time makesure that the indicator dot on each knob agrees with thecontrol position. (14) From the bottom side of the shelf,insert a #8 x I" screw, with a 1/2" flat washer againstthe head, through both the left and right side center holes.These screws engage the stamped nut over each hole onthe chassis flange and when tightened secure the chassisto the shelf.
electrical installation
The HF-81 can be used in two ways for a stereophonicsystem. In all cases, plug monophonic sources and onetrack of monophonic/stereophonic sources in the channel1 inputs; plug the other track of stereo sources in the channel 2 inputs. It is assumed in what follows that a stereophonic phono cartridge is being used . Monophonic phonorefers to playback of a monophonic recording with a stereophonic cartridge.
CH.2
32 16 8 .4 G
(J) (]) (J) (J) ()
TO MATCHINGTAP
CH.I
32 16 S 4 G
TO MATCHINGTAP
FIG. 10. SPEAKER CONNECTIONS
a) INTERNAL POWER AMPLIFIERS OPERATED SEPARATELY, EACH DRIVING ONE SPEAKER OF A STEREO PAIR.This arrangement is used when there is no other amplifierthe user desires to include in the system. The SERVICESEL.sl ide switch on top of the chassis must be set to SEParate. Signal connections are all internal, so only thespeaker connection need to shown (Fig. la, rear chassisview). The internal arrangemention in the HF-81 at eachof the positions of the FUNCTION selector are shown inFigs. lb, lc, ld, le, H, and Ig, as an aid to understanding the operation with this arrangement.
SPKR.2 SPKR.I
FIG.lbCHECK AMPL. 1
CH.I HIGH CH.lLEVEL INPUTS TAPE OUT
CH.I LOW _--_IPREAMPt r r:r<5NEl t --IIPOWER AMP L-- SPEAKERLEVEL INPUTS . CH.I~ . CH.l ~ CH.I
FIG.lcCHECK AMPL. 2
CH. 2 LOWLEVEL INPUTS
Ip~:,~p~! --II PO~~.~AMP~SP~~;R
CH.2 HIGH CH.2LEVEL INPUTS TAPE OUT
CH.l HIGHLEVEL INPUTS
CH.lTAPE OUT
1--__ SPEAKERCH.I
CH.l LOWLEVEL INPUTS
FIG.ldSTEREO NORMAL
CH.2 LOWLEVEL INPUTS
SERVICE SEL.
IPREAMP~ SEP ••• jr-P""':"O-W""':"ER:"""AM-:-:-:"P::-1L-- SPEAKERCH.2 I 1 19!:2J ~ . CH.2 ~ CH.2
CH.2 HIGH CH.2LEVEL INPUTS TAPE OUT
CH.l HIGHLEVEL INPUTS
CH.ITAPE OUT
1--__ SPEAKER
CH.2
1-_'- SPEAKERCH.l
CH.I LOWLEVEL INPUTS
CH.2 LOWLEVEL INPUTS
FIG.leSTEREO REVERSE
CH.2HIGHLEVEL INPUTS
CH.2TAPE OUT
4
CH.I HIGHLEVEL INPUTS
CH.ITAPE OUT
1-__ SPEAKER
CH ICH.I LOW
LEVEL INPUTS
FIG.1fMONOPHONIC TUNER,
TAPE, TV SEP 1---_ SPEAKERCH.2
CH.2TAPE OUT
CH. I HIGHLEVEL INPUTS
CH. ITAPE OUT
I--__ SPEAKERCH. I
CH. I LOWLEVEL INPUTS
FIG. 19MONOPHONIC PHONO
CH.2 LOWLEVEL INPUTS
~SEP., •CH.2
CH.2 HIGH CH.2LEVEL INPUTS TAPE OUT
SERVICE SEL
IPOWER AMP If-__SPEAKER
CH.2. • CH.2
* On integrated amplifiers HF20, HF32 feed into TAPtOUTPUT [eekj en HF52r feed into ELECTRONIC CROSSOVER INPUT jack, after severing connection betweenELECTRONIC CROSSOVER IN and OUT jacks.
FIG. 20. SPEAKER & EXTERNALSIGNAL CONNECTIONS.
G4
CH.I
32 16 8
CH.2
4 G
~_~__~ ~ p (J).- - - - - - - - - - - - - - I
I,II
. I::11
:Q itl'" "'I~ 0,o ""Ico I
1II
32 16
-''- -- -- --- '1EXTERNAL BASICPOWERAMPLIFI ER '
~I~,
~I
1 -
o
TAP!:OUT
"INPUT
2
b) INTERNAL POWER AMPLIFIERS COMBINED (TIEDTOGETHER AT THE INPUTS AND PARALLELED AT THEOUTPUTS) TO DRIVE ONE SPEAKER OF A STEREO PAIR.This arrangement is employedwhen the useralready has ahigh quality amplifier (usually 20watts or more if it is tobe worthwhile) which he desire to include in the system.The oreamo-tone control combination including the regltie preamp-Tone conrroi COmOlnUJlUlI 11I"'IU\,llll~ """ '''''l:f-ular CHI·tone control feeds the combined internal poweramplifiers; the preamp-tone control combination including
. the regular CH2 tone control feeds out through the CH2TAPE OUT jack to an external power amplifier. The SERVICE SELECTOR switch on the chassis must be set at theCOMbined position for this service in order to disconnectthe input of the CH2 power amplifier from the output ofthe CH2 tone control and connects it instead to the inputof the CH1 power amplifier. The CHI and CH2 poweramplifiers are paralleled at the outputs, as shown, by anexternal jumper connected between corresponding speakerconnection taps . The external signal connection and thespeaker connections are shown in Fig. Zc, The internalarrangements in the HF-81 at each of the positions of theFUNCTION selector are shown in Figs. 2b, 2c, 2d, 2e,2f, and 2g, as an aid to understanding the operation withthis' arrangement.
CH.I HIGHLEVEL INPUTS
CH.ITAPE OUT
FIG.2bCHECK AMPL. 1
CH.I LOWLEVEL INPUTS
SPEAKERCH.I
5
FIG.2cCHECK AMPL. 2
CH.2 LOWLEVEL INPUTS
CH.2 HIGHLEVEL INPUTS
CH.2TAPE OUT
_ SPEAKERCH.2
CH. I HIGHLEVEL INPUTS
CH.ITAPE OUT
FIG.2dSTEREO NORMAL
CH.I LOWLEVEL INPUTS
CH.2 LOWLEVEL INPUTS
SPEAKERCH.I
CH.2 HIGHLEVEL INPUTS
CH.2TAPE OUT
_ SPEAKERCH.2
FIG.2eSTEREO REVERSE
CH.l LOW ... _LEVEL INPUTS
CH.2 LOWLEVEL INPUTS
SPEAKERCH.I
CH.2 HIGHLEVEL INPUTS
CH.2TAPE OUT
I--_--.:SPEAKERCH.2
CH.l HIGHLEVEL INPUTS
CH.l LOWLEVEL INPUTS
FIG.2fMONOPHONIC TUNER,
TAPE, TV
SPEAKERCH.l
!POWERAMP I, __--=SPEAKER~----. EXTERNAL"'"' • CH.2
CH.2TAPE OUT
I
6
CH.l LOWLEVEL INPUTS
FIG.2gMONOPHONIC PHONO
CH.2 LOWLEVEL INPUTS
CH.l HIGHLEVEL INPUTS
CH.2 HIGHLEVEL INPUTS
CH.lTAPE OUT
CH.2TAPE OUT
SPEAKERCH.l
f--- SPEAKERCH.2
c) INPUTS: There are identical pairs of MAG. PHONO,TAPE HEAD, MICROPHONE, AUXILIARY A, and AUXILIARY Binputs -one of each pair in channell and channel 2 - and each is identified accordingly by the suffix1 or 2. The MAG. PHONO, TAPE HEAD, and MICROPHONE pairs of inputs are all "low level" inputs, meaning that they all feed through a preamplifier/equalizerstage in either channel 1 or 2. The AUXILIARY A andAUXILIARY Bpairsofinputs are "high level" inputs, meaning that they enter either channel 1 or 2 at a point afterthe preampl ifier/equalizer stages. The AM, FM and FMFM Multiplex inputs are also "high level inputs", whichnr", intArnnllv ~"'IA...,t",rl in nnir~ - nn", fnr ",n...,h ...,hnnn"'lare Interne y se ectea In pal rs - one for each channe- by the INPUT SEL. switch. At the MONAURAL position of the FUNCTION SEL., AM only is selected at theAM-FMposition of the INPUT SEL., and FMonlyis selected at the FM- FM MULTI. position of the INPUT SEL.
l) MAG. PHONO 1, MAG. PHONO 2: These inputsare intended for the two outputs ofa stereo magnetic cartridge, or for a stereo ceramic cartridge with adaptors.The correct method for wiring a three terminal cartridgeis shown in Fig. 3. If the cartridge is a four terminaltype, short the two inside terminals of the cartridge together and treat it exactly as if it were the single centerterminal shown in Fig. 3. The loading presented to eachoutput of the cartridge by each MAG. PHONO input is100,000 ohms. If a lower loading resistance is requiredby the particular cartridge used, connect a shunt resistorof appropriate value from each outside terminal of the cartridge to the center (common) terminal. This can be doneactually by mounting a 3-post terminal strip on the underside of the phonograph mounting board at a point near thelead break-out from the pickup arm. These shunt resistorsare then wired to this terminal strip as shown in Fig. 3.The value of each of the two shunt resistors (Rs) can bedetermined fromthe desired loading resistance (RI) by thisformula Rs = 100,000 x RI ohms
100,000 - RIor th is tabl e; for RI = 50KQ, use Rs = 1OOKQ; for RI :: 33KQ,use Rs = 50KQ; for RI = 25KQ, use Rs = 33KQ.
7
* NOTE: All ceramic cartridge manufacturers have developed simple networks which when connected the outputsof their cartridges result in a characteristic identical tothat of magnetic cartridges. By interposing the recommended adaptor for the particular ceramic cartridge between the cartridge outputs and the MAG. PHONO inputs of the amplifier, it is possible to use the MAG. PHONOinputs for the ceramic cartridge with excellent results.Adaptor networks are given in the literature for the particular ceramic cartridge and can be built on a terminalstrip mounted on the underside of the phonograph base, ormay be available in convenient component form from thecartridge manufacturer. Stereol;lhonic crystal cartridgesccrrrrcge mcnurccrurer, orereopnoruc crysTal carrnages
(Ronette "Binofluid" OV and BF40) can be connected directly to auxiliary high level inputs.
2} TAPE HEAD 1, TAPE HEAD 2: These inputs are intended for direct connection to the two outputs of a stereotape playback head. A front panel slide switch permitschoice of NARTB tape head equalization either for71/2(& 15) ips or3 3/4 ips tape speeds. The loading resistancepresented by each tape head input is 100,000 ohms.
3} MICROPHONE 1, MICROPHONE 2: These inputs areintended for rec~~:ving the output signals directly fromtwo separate microphones. It is preferable that the microphones used be of the high impedance type.
4) AUXILIARY A1, AUXILIARY A2: These inputs areintended for either a stereophonic or monophonic highlevel source. A stereophonic high level source might bea stereo tape deck with built-in playback equal izationfor both tracks. A monophonic high level source mightbe a monophonic crystal cartridge or tv sound. Plug amonophonic source intoAUXJLlARY A1, leaving theAUXILIARY A2 input unused. Note that the input impedanceat all these high level inputs is 0.5 megohm, which is toolow for ceramic cartridges requiring 2 to 3 megohms input impedance. For ceramic cartridges, use the MAG.PHONO inputs with the simple adaptor networks recommended by the manufacturers. For stereophonic crystalcartridges (Ronette "Binofluid" OVturnover and BF40 single needle), the 0.5 megohm load provided at the highlevel inputs is exactly the loading impedance required.
TO MAG. INPUT 2
B-1
~~~~-~, - (8- I
TO MAG. INPUT 1
STEREO MAG.CARTRIDGE
FIG. 35) AUXILIARY B'l, AUXILIARY B2: Same as for AUXILIARY AI, AUXILIARY A2 above.
6) AM: This input is intended for AM tuner or the AMoutput of an FM-AM tuner where the FMand AM sectionsare independent.
mentioned sources to the correspondmg amplifier inputjack. Unless the source has a low-impedance output suchas a cathode follower (with which up to 50ft. of cablecan be used), use the shortest possible connection andlow - capacity shielded cable (cable having os low as25mmfd capacitance per foot is available).
7) FM: This input is intended for an FMor FM-AM tunerwhere the FM and AM sections are~ independent.
8) FM MULTIPLEX: This input is intended to receive theoutput from an FM Multiplex adaptor.
NOTE: A shielded cable with a shielded "phono-type"plug should be used to connect from each of the above-
d) TAPE OUTPUT I, TAPE OUTPUT 2: When no externalamplifier is used in the system, both these outputs areavailable for feeding out to a stereo recorder. When anexternal power ampl ifier is used in the system, TAPE OUTPUT 2 is used to feed out to the external power amplifier.If it is desired to do stereo recording under the latterconditions, construct a device such as shown in Fig. 4.Use low capacity shielded cable for connections.
After checking the ampl ifier for proper operation, removeall input cables to the amplifier and make the followingcontrol settings which hold throughout the process of humadJustment: INPUT SELECTOR at PHONO, FUNCTIONSELECTOR at STEREO, FOCUS control at 0, LEVEL control at 10r both TREBLE controls at -5, both BASS controlsat 0; the two speaker systems mustbe in phase and placednear one another for this adJustment. Next, procede as
TO INPUT 2I V lI"1ru I ,L
OF STEREORECORDER
"'------ 1'"'--_----:....8 I!l
~ 6, (8 I!l
TO EXTERNALPOWER AMPLIFIER
follows: With your ear held close to the speakers, insertthe amplifier power plug into the wall outlet and listento the hum level. Now pull out the plug and re-insert itwith the prongs reversed. Choose the prong position withthe least hum. Now connect the tuner input connector tothe amplifier input jack, and with the tuner set betweenstations and the tuner volume control set at a minimum, dothe same with the power plug of the tuner; use either the117VAC receptacle on the HF-81 or one receptacle of acube tap inserted in the 117VAC receptacle on the HF-81.Next, connect the phono cartridge leads to the MAG.PHONO 1and 2 Inputs, and, with turntable off and pickup arm at the rest position, find the insertion position ofthe turntable line cord plug that yields lowest hum. Finally, connect the tape head leads to the TAPE HEAD 1and 2 inputs, and, with the tape deck turned off, find theinsertion position of the tape deck line cord plug that results in lowest hum. When all of this is completed, adjust the humbalance control on top of the amplifier chassisfor least hum.
TO INPUT 1~OFSTEREOU~ RECORDER
-dJHF81TAPE,",liT
OUT~-----~
._- ... '.
HUM ADJUSTMENT
2 - PHONO RECEPTACLE
STRIP FIG. 4
e) POWER CONNECTIONS: The line cord of the HF-81must be plugged into a house outlet providing normally117 volts , 60 cycles AC power. A convenience recep-tacle on the rear chassis can be used, if desired, with acube tape to provide 117VAC power to the associatedequipment. This convenience receptacle is not switchedor fused and provides 117VAC at all timeS;-regardlessof whether the HF-81 is turned on or off.
8
operation
PRELIMINARY: Be sure all tubes are firmly seated in theirsockets and that the tube shields are making good contactwith their baSes. As initial adJustments, set these controlsas follows: LEVEL at 0, FOCUS at Or both BASS controlsat O. Tum the amplifier on by turning the TREBLE 2 control clockwise from AC OFF and set it at zero initially.Also set the TREBLE 1 control at zero. Please note thatin the instructions that follow, it is assumed that a stereopick-up and/or a stereo tape head is being employed inthe system.
LISTEN IN G TO PHONOGRAPH: Set the IN PUT SELECTOR to PHONO if you have a megnetic cartridge or aceramic cartridge with adaptors interposed between thecartridge outputs and the MAG. PHONO 1and 2 inputs.(The RIAA equalization provided at the PHONOpositionis now the international standard in the recording industryfor both monophonic and stereophonic records and is alsoa very good compromise for the most important of the oldermonophonic recording characteristics.) Set the INPUTSELECTOR to AUX Aor AUX B if you are using a stereophoni c crystal cartridge (Ronette) connected to eitherAUXA or AUX B inputs. Set the FUNCTION SELECTOR ateither STEREO position. To balance levels between thechennels; playa conventional monophonic (lateral) recording on the changer or turntable and turn the LEVELcontrol up until you have normal listening level. Note_. - _. • -- r _I •• _ ., II."
that the action of the FOCUS control (sometimes called a"balance" control) is to simultaneously raise the level inone channel while lowering the level in the other as it isturned in anyone direction. At the zero setting of theFOCUS control, equal sound volumes would obtain on bothchannels only if the ideal conditions of identically efficient loudspeakers and identical overall gains in bothchannels existed. With the conventional monophonic recording being played, adJust the FOCUS control for equalvolume from each speaker system. With the FOCUS setting properly made, any stereo recording played back willhave close to the same balance as actually exists in therecording. The FOCUS control setting can be a semi-permanent adJustment in that, at any given time, the settingachieved as described above will usually be satisfactoryfor tape stereo, and may also be for broadcast stereo, ifit means existof adJusting for equal output levels from thestereo broadcast rece iving equ ipment. Ascomponents age,a shift of the normal FOCUS control setting may be necessary. Note that there are a concentricpairofbass controls, one in each channel and a concentric pair of treblecontrols, one in each channel. Use the separate bass andtreble controls to compensate for any audible deviationof the recording from the standard recording characteristic,as well as to compensate for the over-all characteristicsof your audio system (including room acoustics). Set theFUNCTION SELECTOR to STEREO NORMAL or STEREOREVERSE for stereophonic records and to MONOPHONICPHON 0 for CONVENTIONAL MON OPHON IC records.
LISTENING TO TAPE DECK (direct connection to tape
9
head): Set the INPUT SELECTOR to TAPE. NARTB tapehead equalization is provided in both channels for thetape speed selected with the TAPE switch on the frontp~nel" One position is for7-1/2and 15ips tapes and theother for 3 3/4 ips tapes. These equalizations are theindustry standard for pre-recorded stereophon ic and monophonic tapes. If the FOCUS' control has been set asdescribed in the preceding paragraph, it will usually besatisfactory for this function also. Otherwise, it may beset in a similar manner using a test tapeorsimply by ear.Set the FUNCTION SELECTOR to STEREO NORMAL orREVERSE for stereophonic tapes or to MONOPHONICTUNER, AUX for monophonic tapes. Use the BASS andTREBLE tone controls as described above.
LISTENING TOAMONOPHONIC SOURCECONNECTED TO AUXILIARY AI, AUXILIARY Bl, TO MONOPHONIC AM BROADCAST, ORTO MONOPHONIC FMBROADCAST: Set the INPUT SELECTOR to AUX. A,AUX.B, AM-FM, or FM-MULtt. respectively and theFUNCT10N SELECTOR to MO~OPHONIC TUNER,AUX.Use the BASS and TREBLE controls as described previous IY»
LISTENING TO A STEREOPHONIC SOURCE CONNECTED TO AUXILIARY Al and A2, AUXILIARY B1 and 82,AM and FM, FM and FM MULTIPLEX: Set the INPUTSELECTOR to AUX A, AUX Br AM-FM, or FM-MULTI-----·--· .. ·-,·-"- .. ·r '·'-"'-r , _ ••••• '.'--'11
respectively. Set the FUNCTION SELECTOR at STEREONORMAL or STEREO REVERSE. The FOCUS, BASS andTREBLE controls are set as described previously.
MAKING RECORDINGS: Tape recordings may be madeby connecting the recorder to the TAPE OUTPUT Jacks.See "TAPE OUTPUT 1, TAPE OUTPUT 2" under ELECTRICAL INSTALLATION. Please note that recordingscannot be made on tape decks unless those decks areequipped with the electronics required for recording.
FUNCTION SELECTOR: The STEREO NORMAL and STEREO REVERSE positions are both used for stereophonic reproduction. At the STEREO REVERSE position, the channel 1 and channel 2 amplifiers from the tone controls tothe speaker connections are interchanged. These twopositions permit interchanging the signals fed to the twospeakers so that the correct left to right display of theorchestra can be achieved on all recordings or broadcasts.The CHECK AMPL. 1 and CHECK AMPL. 2 positions permit hearing either channel 1 alone or channel 2 alone forcomparison or balancing purposes during stereophoni c use.The MONOPHONIC TUNERr AUX position is used formonophonic FM, AM, tv sound, monophonic phono cartridge monophoni c pre-ampl ified tape etc., fed into channell inputs. At this posltlon, the channel 2 inputs whichare unused in this type of operetlon, are disconnectedfrom t-he active channel so that they cannot contributeinterference. At the MONOPHONIC PHONO position,the channel 1and 2 corresponding inputs are mixed, whichis useful when playing monophonic records with a stereophonic cartridge to cancel vertical rumble components.
BASS CONTROL 1, BASS CONTROL 2 (CONCENTRIC):The plus sign on the right side of the dial indicates that
clockwise rotation from the mid-point (0) of either controlincreases (boosts) _bas~ response; the minus sign on the leftside indicates that counter-clockwise rotation from the
mid-point decreases (cuts) bass response. There is no in-teraction with the TREBLE control. Start all adjustmentswith this control set at the mid-point (0), which is calledthe "flat" position since bass response is neither cut norboosted at this position.
maintenance
TREBLE CONTROL 1, TREBLE CONTROL 2 (CONCEN-TRIC): The plus sign on the right side of the dial indicatesthat clockwise rotation from the mid-point (0) of eithercontrol increases (boosts) treble response; the minus signindicates that counter-clockwise rotation from the mid-point decreases (cuts) treble response. There is no inter-action with the BASS control. Start all adjustments withthis control set at the mid-point (0), whi ch is called theflat" position since treble response is neither cut nor
boosted at this position.
GENERAL
Your amplifiershou Id require I ittle service except for nor-mal tube replacement. We recommend no substitutions forthe tube types used in this amplifier except as stated. Allthe tube types used are distributed national Iy, but replace-ments can be obtained directly from EICO if desired.
To facil itateservicing, remedial and trouble-shooting pro-cedures have been provided in the TROUBLE-SHOOTINGCHART that follows. A VOLTAGE AND RESISTANCECHART is also provided as an aid in locating defectivecomponents. DC operating voltages are given both at nosignal and signal developing 14 watts output, as well asthe corresponding 1 kc signal voltages.
TROUBLE-SHOOTING PROCEDURES
Connect the leads from the stereo cartridge and from thetwo speakers to the amplifier. These connections are madeas described in the section "Electrical Connections " . Setthe Input Selector control at PHONOand the Function Se-lector at STEREO. Playa known high quality stereo record-ing on the phonograph. If there is no output to the speakerof if the output is low or audibly distorted, procede to thechecks for those symptoms. If there is excessive hum in
. the output, disconnect the phono input cable from theampl ifier and short the phono input jack to chassis. If thehum disappears, the trouble is not in the amplif.er but inthe phonograph or in the connection to the amplifier. each case, check for the trouble in the amplifier whichseems defective. If both amplifiers are defective, checkthe power supply.
The cause of phonograph hum may be a metal pick-up armnot grounded to the cable shield (try a good single groundconnection to the cable shield from turntable frame, pick-up arm, and cartridge case), direct hum pick-up by themagnetic cartridge from the record player motor(tryusinga rubber mat on the turntable to increase the separation ofthe pick-up from the motor), or pick-up from a power
transformer or other magnetic field in the vicinity (trymoving phonograph away from suspected source). Checkalso that the phono input cable shielding is grounded tothe ampl !fier chassis at one point only, through the skirtof the input connector where it plugs into the ampl ifier.Finally, try a good building ground such as a connectionfrom a cold water pipe terminated under speaker terminal
G" on the amplifier Do not connect such a ground wireto other components in the system If possible, let eachchannel be connected to the amplifier using a separateshielded cable to the ampl ifier input. It is also desirablethat the ground leads on both cables not be connected to-
gether at any point - not even at the cartridge. How-ever, with some cartridges, it will not be possible to do
this. In this case, just disregard this last instruction.
Excessive hum on other inputs may be checked in a similarmanner. Disconnect the input cable in question and shortthe particular input jack to the chassis. If the hum dis-appears, the trouble is external to the amp! ifier. Notethat on all inputs, the braid of th;;; input cable shou Id con-nect to the ampl ifier only through the skirt of the inputconnector. The cause and remedies for the following
symptoms are then based on the assumption that checks
made in the manner described above have eliminated thepossibilityof the trouble being external to the amplifier.
If the trouble is no output or low output, check AC signalvoltages and DC operating voltages starting at the inputand work step_by-step toward the output in each ampl i-fier. Set the VOLUME control to maximum (10), theFOCUS, BASS and TREBLE controls to their mid-points(0), the INPUT SELECTOR to PHONO and the FUNC-TION SELECTOR to STEREO . Use a 1000cycle sine-
wave signal, such as supplied by the EICO 377 Sine &Square Wave Audio Generator In addition, use a pre-cision 100: 1 attenuator to permit obtaining a level of
0035 volt fed into MAG. PHONO from an audio gen-erator output of 0. 35 volts, which can easily be measuredonthelowestACvolts range ofyourVTVM (also improvessignal to hum from generator). Use a high input imped-
ance VTVM for all AC signal voltage measurements; aVTVM or 20, OOOQ/v YOM for DC volts measurements.
. If the trouble is an excessively distorted output, try tubereplacement, signal tracing, or procede directly to vol-tage and resistance measurements.
When the defective stage is local ized, procede to a resist-ance and voltage check of the stage, using the data in theVOLTAGE and RESISTANCE chart. Disconnect theampli-fier from the power line and discharge capacitors prior tomaking any resistance check and prior to removing any orall of theEL84output tubes. Do not turn the amplifier onwith any of the output tubes remove
CHECKING A TYPICAL TUBE STAGE
1. Check tube.2. Check plate and cathode resistor.3. Check coupl ing capacitors for leakage or short.4. For output stage, check dc resistance of transformerwindings.5. Check grid leak resistor for open.6. Check cathode by-pass capacitors for short.7. If no or low B+ voltage on tube, check decoupling
path for open or defective R60, R61, R62, R63 and fiI tercapacitor C37, C38 or C39.8. . If wiring and circuit components including the tubecheck O. K. and B+ voltage is excessive)' check the de-coupl ing path for short or defective R60, R61, R62and R63.
Suspected trouble in the equalization)' tone, focus, andvolume controls and networks should lead to specific re-sistance and capacitance checks to localize the trouble.In general, if the user suspects poor frequency response,defective equal ization)' or defective operation of the tonecontrols, the amplifier should be tested thoroughly withaudio generator, vtvm, and scope.
SPEAKER PHASING
IMPORTANT NOTE ON SPEAKER PHASING: The twoloudspeaker systems must be connected so that they operate.in phase, meaning that corresponding cones or diaphragmsin the systems move in and out together when actuated bythe same or similar signals. A simple method of checkingthis is to playa conventional monophonic (lateral) record-ing having considerable bass program material, setting theFUNCTION SELECTOR at MONAURAL. After listeningfor a few minutes, reverse the connections of the speakerleads at only one of the speaker systems - not both - andlisten again to the same program material. Normally, youwi II noti ce that one of these connections seems to give
bass re-inforcement and the other bass cancellation. The
connection that gives bass re-inforcement is the in-phaseconnection and should be used.
Another criterion for the in-phase connection is that ofblending, which can be best applied if the speaker systemsare identical or at least have similar middle and highfrequency range reproducers. With the in-phase con-nection and both speakers operating at approximately thesame volume level, a monophonic source will appear to beemanating from a point mid-way between and the twospeakers will blend. With the out-of-phase connection,the two sources will appear to remain separate.
SERVICE
If trouble developes in your instrument which you can;.,tremedy yourself, write to our service department listingall possible indications that might be helpful. If desiredyou may return the instrument to our factory where it wi be placed in operating condition for $12. 50 plus the costof parts replaced due to their being damaged in the courseof construction. NOTE: Before returning .this unit, besure all parts are securely mounted. Attach a tag to theinstrument, giving your home address and the trouble with
the unit. Pack very carefully in a rugged container)' us-ing sufficient packing material (cotton, shredded news-paper, or excelsior), to make the unit completely immov-able within the container. The original shipping cartonis satisfactory, providing the original inserts are used orsufficient packing material inserted to keep the instru-ment immovable. Ship by prepaid Railway Express, ifpossible, to Electronic Instrument Co., Inc., 33-00 North-ern Blvd., Long Island City I, New York. Return ship-mentwill be made byexpress collect. Note that a carriercannot be held liable for damages in transit if packingIN HIS OPINION)' is insufficient.
SYMPTOM
Amplifier causes power line fuse toblow. Power line fuse blows againwith VII & V12 out of their sockets.
Amplifier causes power line fuse toblow. Power line fuse does not blowagain with VII & V12 out of theirsockets.
Any or all tube filaments not lit.
Output tube bias too high (result-ing in distorted output waveform).
DC voltage at Vl1, V12 cathodes(pin 3) is incorrect as specifiedbelow.
a) No voltage.
b) High voltage.
c) Low voltage.
Excessive hum on mag. phono tapehead or mic.
Excessive noise on mag. phonotape head or mic.
Sustained oscillations.
Sustained microphonicson mag.phono, tape head or mi c.
Hum on all inputs.
TROUBLE-SHOOTING CHART
CAUSE REMEDY
Line cord, J16, primary or high voltage Replace or repair.secondary windings of T1 shorted internallyor externally (wiring).
VII, V12, C39)' V7, va, V9, VI0, or T2 T3 primary shorted internally or exter-nally.
Open tube fil ament.Open lead from 6. 3V winding of T1.6 3 V winding of T1 open.
Open R56, R57.
Defective VII or V12.
C39 shorted internally or externally.
Connection from C39 to pin 3 of VII& V12 broken.Connection to center tap of h. v. second-ary winding of T1 open.Output tubes V7, VS, V9, VI0 over-biased or not drawing current. May re-sult from open R56 or R57.
Excessive current drain in amplifier.
Defective VII, V12.
VI or V2 defective.FiI. leads dressed toa close to gridlead.Tube shield not making electrical con-
tact to base or base not making elec-
trical contact to chassis.
Shielding and grounding of wiring toinput jacks not exactly as instructed
and shown in drawings.
VI and V2 and contacts dirty.
Poor dress of output transformer T2 orT3 leads.
VI or V2 defective.
V3 or V4 defective, not properly
shielded, or dirty sockets and contacts.
Dress of power transformer T1 leads.
Replace or repair.
Replace or repair.
Replace or repair.
ReplaceReplace or repair.
Repair
'#" .
Repair
Replace, repair, or see trouble-
shooting typical tube stage.
See trouble-shooting typical tube
stage.Replace
ReplaceDress fit. leads away from grid lead.
Check and correct.
Correct
Clean throughly with carbontetrachloride.
Dress all input leads and T3 leadsaway from each other. Keep T3
leads away from input jacks.
Replace
Replace, correct, or clean.
Correct
VOLTAGE AND RESISTANCE CHART
TUBE PIN# OPERATING VOLTS OPERATING VOLTS SIGNAL VOLTS OHMS
AT NO SIGNAL AT 14W OUT (1 kc) at 30W OUT UN IT DISCONNECTED(DC UNLESS NOTED) (DC UNLESS NOTED) FROM POWER)
CC83(12AX7 290KO014 IMO
7KO
4&5 filament (OVDC; 6. 3VAC to pin 9) 500290KO
0035 90KO2KO
filament 500
ECC83/12AX7 290KOIMO
7KO
4&5 filament (OVDC; 6. 3VAC to pin 9) 500290KO90KO
2KOfi lament 500
ECC82/12AU7 1. 2 120KO
V3, V4 61OKO. 1 3KO
4&5 filament (OVDC; 6. 3VAC to pin 9) 500170KO190KO
1. 8 1. 75 065 8KOfilament 500
ECC83/12AX7 195 190 100KO
V5, V6 470KO100KO
4&5 filament (OVDC; 6. 3VAC to pin 9) 500470KO
1. 15 250KO1. 1 7KO
filament 500
EL84(6BQ5 340KO,1, 340KO
12. 14.
. \.
16504&5 filament (OVDC; 6. 3V AC between pins 4 & 5) 500
330KO335 325 180 165 1900
330KO330 320 3500
EL84(6BQ5 340KO340KO
12. 14. 03* 16504&5 filament (OVDC; 6. 3V AC between pins 4 & 5) 500
6 2 330KO-,7 335 325 180 330KO
330 320 3500
EL84/6BQ5V9, V10
EZ81/6CA4VII, V12
4&5
4&5
* = 60 cycles
0 6.12. 7 14. 7 . 03 *filament (OVDC; 6. 3VAC between pins 4 & 5)
340KQ340KQ165Q
50 Q
335
330
325
320
165- 190 Q330KQ350Q
180
290 V AC * 29OV AC* 290* 45-55 Q340 335 7.filament (340VDC; 6. 3VAC between pins 4 & 5)
100KQ100KQ
290V AC * 290* 45-55 Q290V AC *
All resistance measurements, except those made from pin 3 of Vl1 and V12 (EZ81 rectifier), aremade with pin 3 of V11 and V12 grounded. All voltage and resistance measurements are measuredto chassis with the controls set as follows: INPUT SELECTOR to PHONO, FUNCTION SELECTORto STERO NORMAL)' LEVEL at 10, BASS, TREBLE & FOCUS controls at O. For voltage measurementsat 14W output, set the input selector to the PHONO position and feed a O. 0035volt (;3. 5mv) 1 kcsignal to the CH 1 & CH 2 Mag. Phono Input jacks; connect a resistive (preferably non-inductive)load to the output of each amplifier, of equal resistance to the tap selected (::1:20%), and capable ofhandling 15 watts. Voltage measurements are made with a VTVM. Operating line voltage atwhlchvoltage measurements are made is 117VAC, 60cps. NOTE: ALL VOLTAGE & RESISTANCE VALUESNORMALLY BY::I:15%.
SECTION AUXA AUX B AM-FM FM-MUL TI MIC PHONO TAPE
INPUT
SELECTOR11- 11-
SWITCHS 1 2-6-
10- 11- 10- 11- 10- 12 10- 10- 11- 10- 11-
3- 7
4-11 1 -4- 2-4- 3-4-
3-6-10- 10- 12. 10- 10- 10-
1":1210-
10- 10- 10- 9- 1 0- 10- 10-11
SECTION AMPL. 1 AMPL. 2 NORMAL REVERSE TUNER AUX. PHONO
FUNCTIONSELECTORSWITCH 4- 10 3-4-7
1) Entries are numbers of those switch contacts which are connected together by the rotors at the particular position.
NC means no connection.2) On schematic diagram, all switch wafers shown in the maximum counter_clockwise position (AUXA and CH 1CHECK)as
seen from the front or shaft end.
TOP VIEW
~'-'t'~ ECC83/12AX7
~~L~~/6BQ5 ~~~84/6BQ5
~~~
84/6BQ5 ~~L~4/6BQ5
OPERATES FROM ""V
SO/6C CYCLE AC LINE
MODEL HF- POWER CONSUMPT'ON.
DUAL 14 WATT HIGH FIDELITY 140 WATTS
INTEGRATED AMPL"'ER
r'\ V- r'\ECC83/12AX7V ECC82/12AU7V
r'\ r'\ V-ECC83/12AX7V VECC83/12AX7
r'\V- 11 r'\V-
r'\V- VEZ81 \JEZ81VECC82/12AU7
ELECTRONIC INST. 'CO.. INC.
noo NORTHERN BLVD
L , CITY 1 N Y
FRONT
AUX A
iUEIiJ.MODEL HF- AUX BDUAL 14 WATT HIGH FIDELITY
INTEGRATED AMPLIFIER
OAM MULTIO
OFM3 AMPS 117 VAC TAPE OUT SPEAKER CONNECTIONS
(Q) ITJJ 10 0 0 001 100000\ 000 000CH- 2 CH. MIC PHONO TAPE MIC PHONO TAPE
CHANNEL 2 CHANNEL 1 CHANNEL 1 CHANNEL 2
REPLACEMENT PARTS LIST
Stock' Symbol Description Stock' Description
20050 Cl, cop. , paper
, .
25mfd, 200V ~1\T TB15, terminal strip, 2 past right
23014 C3, cop., elec., lOmfd, 6V 54000 TB17 terminal strip, lP left
23020 C5, cap., elec. , 25mfd, 6V 90034 Vl, tube, 12AX7
22517 C7, 33, cap., disc., . 025mfd, GMV (25K or 25,OOOmmf) 90033 tube, 12AU7
C35, 36, 45, 46 90039 V7, 8, 9, tube, EL84
22514 C9, cap., disc., 850mmf, "'10% 90038 Vll, tube, EZ81
22518 Cl1, cap., disc., . 0027mfd, "'10% (2. 7K or 2700mmf) 97800 XFl fusebolder
22550. C13, cap. disc., 6oommf, "'10% 97712 XII pilot assembly
22506 C15, cop. disc.
, .
02mfd, "'10% (20K or 20,000mmf) 97027 XV1, 2, 3, sacket, 9 pin min. w/shield
20039 CI7, 18, 21, cap.,molded,. lmfd, 400V, "'10% ...97025 XV5, 6, 7, 8, socket, 9 pin min.
22520 CI9, 20, 41, cap., disc., . 0012mfd, "'10% (1.2Kor 1200mmf) 10,
22529 C23, cap. disc., 150mmf, "'10% 40000 nut, hex, '6-22543 C25, 26, 27, 28 cap., disc., 225mmf, "'10% 40001 nut, hex, '3/8-23007 C29, cap., elec., 5Omfd, 25V 40007 nut, he", '4-4022533 C31, 32, 43, 44 cap., disc., 47mmf, "'10% 40008 nut, he", '8-3224005 C37 cap. , elec., 4O- 40- 20mfd/350- 350- 400V 40016 nut, for fuse holder
23016 C38, cap., elec., 30mfd, 4O0V 40026 nut, lin., '8-20043 C40 cap., molded, .03mfd, 600V 40027 nut, tin., angle bracket
22519 C47, 48 cap., disc., . 0Imfd, "'10% (10K or 10,000mmf) 41000 screw, '6- 32 x 1/491005 fuse, 30mp 41003 screw, '8- 32 x 3/892000 pilot light, '47 41016 screw, '4- 40 x 1/450020 JI- jack, quad, 41026 screw, '4-40 x 1/4 brass
50018 J5- jack, triple 41027 screw, '4 wood10. 41028 screw, '8- 32 x 1
11- 12- 41045 screw, '6 P. K. brown50011 J14- jack, dual 41046 screw, '8- 32 brown50016 J16 outlet, convenience 41047 screw, '8 P. K.
"'" 29751 PCl, printed circuit 42000 washer, '3/8 lock10407 Rl, res., IMQ, 1/~, "'10% (brown, black,green, silver) 42002 washer, '6 lock
..,..
10400 R:r,4, 40, 41, res., 10KQ 1/~, "'10% (brown, black, orange, silver) 42007 ~sher, '4 lock53, 54, 42008 washer, '8 lock
11526 RS, 6, 11 res., 200KQ, 1/~, '" 5% (red, black, yellow, gold) 42029 washer, rubber, forfuseholder10423 res., 2. 2KQ, 1/'NI, "'lOOk. (red, red, red silver) 42032 washer, fiAt, '810430 R13 res., 4. 7KQ, 1/~, :10% (yellow, vi~let red, silver) 43000 lug, '6 ground11504 R15, res., 90KQ, 1/'NI 5% (white, black, orange, gold) 43001 lug, '3/8 pot ground11527 RI7 18, 44, 45, res., 100KQ 1/'NI, '" 5% (brown, black,yellow,gold) 43004 lug, 18 ground
46, 46000 grommet, 3/8
10422 R19 20, 60 res., 68KQ, 1/'NI, :10% (blue, grey, orange, silver) 46006 feet, rubber11518 R2I, res. , 2.2MQ, l('NI, : 5% (red, red, green, gold) 50012 insulator for 50011
_18045 R22, 23 pot. , 750KQ linear, dual 50019 insulator for 50018
---., 8046 R24, 25 pot., 250KQ, audio, dual 50021 insulator for 5002010435 R26, res., 150KQ, 1/~, :10% (brown,green,yellow, silver) 51006 pbono plug10414 R28, 29 res., I. 8KQ, 1/~, :10% (brown, grey, red, silver) 53016 knob, outer concentric18048 R30, pot., IMQ, linear, concentric 53017 knob, inner concentric18047 R32, 33, 54 pot. , 500KQ, linear, concentric w/SPST switch 53018 knob, duell concentric
10410 R34, 35, 68, 69 res", 100KQ, l(ZW, %10% (brown, black, yellow, silver) 57000 line cord
10420 R36, res., 3. 3KQ, l(~, %10% (orange, orange, red, silver) 58004 wire, hook...p, thin wall length
10431 R38, res., 470KQ, 1/~, :10% (yellaw, violet,yellow, silver) 58300 spoghetti length
11543 R42, 43 res. , 1.8KQ, l(~, : 5% (brown, grey, red, gald) 58302 spaghetti, heavy length
10412 R48, 49, 50, 51" res. , 330KQ, 1/~, :10% (arange, arOnge, ye ilow, sHver) 58408 cable, 1 conductor length
58410 cable, 4 conductor length
14600 RS6, 57 res., 1650, !)N, % 5% 58412 cable, 3 conductor length
11538 RS8, 59 res., 22KQ, 1/~, % 5% (red, red, orange, gold) 58501 wire, bare length
10851' R61 res., 22KQ, lW, %10"k. (red, red orange, silver) 80057 panel10952 R62 res., 4. 7KQ,~, :10% (yellow, violet, red, silver) 81109 bottom plale
14302 R63 res., 3500, lOW, :10% 81110 brocket, left
19009 R64 pot" 100Q 81111 bracket, right10421 R70, 71 res., 6. 8KQ, 1/~, :10% (blue, grey, red, silver) 81116 bezel60057 switch, Input Selector 81124 chassis60065 switch, Function Selector 81134 shield w/spade bolls62000 switch, slide, DPDT 81144 perfomled screen62002 switch, slide, SPOT 81145 bracket~ Input30021 transformer, power 81146 bracket far DPDT switch32013 T2, 3 transformer, output 81154 shield bottom54516 TB1, terminal board, 5 screw 81903 clamp, wire54002 TB3, terminal strip, lP right w/ground 89207 label, rear apron54001 T84 terminal strip, IP right 89208 label, tube layout54014 TB5 terminal strip, 3P 2 left 89219 label, service54003 TB6,7, 13, terminal strip, 2 past 97300 tube shield54006 TB9, 11, 18 terminal strip, 3P 2 right 97710 Jewel, red54013 TBIO, 19 terminal strip, lP left w/ground 66067 manual af instructions (wired)54008 TBI2, 14 terminal strip, 4 past 66316 manual of instructions (kit)
Jl0
J13
J12
Jl1
';' ... C
l
",,-
, -c4
....c
6...
. C7
~C8
=C
IO- ClI
..:.C
J2-c
13...
.....C
14-C
J5-'J
6,..
.CJ7
-CJ8
--C
19--
C20
.....C
21-C
22-C
23~C
24""
C25
""1:
26
C13
Des
crip
tion
cap.
,pap
er, .
25m
fd20
0V "
'-C
27ca
p.,p
aper
, .25
mfd
200V
~C
28ca
p.,e
lec.
,10
mfd6V
- C2
9co
p.,e
lec., IOmfd,6V
,.-C30
cap.
,elec., 25mfd6V
"'C31
cap.
,elec., 25mfd6V
;;,-C
32ca
p.,d
isc.
, .02
5mfd
GM
V ,C
33ca
p.,d
isc.
, .O
25m
fd,G
MV
-C
34ca
p.,d
isc.
,85
0mm
f,%
10%
""C
35ca
p.,d
isc.
,85
0mm
f,%
10%
.C
36ca
p.,d
isc.
, . 0
027m
fd, %
10%
;"C
37ca
p.,d
isc.
, .00
27m
fd%
1O%
...C
38ca
p.,d
isc.
,60
0mm
f,%
10%
......
c39
cap.
,dis
c., 6
00m
mf%
10%
.....,
('C..u
Jca
p.,d
isc.
, . 02
mfd
%10
% -C
41ca
p.,d
isc.
, .02
mfd
, %10
% ".
.,c42
cap.
, mol
ded,
. Im
fd, .
.uJO
V,%
IO%
-C43
cap.
mol
ded,
. Im
fd, .
.uJO
V,%IQ%- C44
cap.
,dis
c., .
00J2
mfd
,%IO
"k .?
C45
cap.
,dis
c.
, . O
OJ2
mfd
%10
% "C
46ca
p.,m
olde
d , .
I mfd
, ..u
JOV
, %1O
%-C
47ca
p., m
olde
d, .
1 m
fd, .
.uJO
V, %
1O%
-"'C
48co
p., d
isc.
, 15
0mm
f%
10%
'-Jl
cap.
,disc., 150mmf,%
10%
_ca
p.,d
isc., 225mmf%
10%
-:13
cap.
,dis
c., 2
25m
mf%
10%
-~'4
';'';'
Des
crip
tion
cap.
,dis
c., 2
25m
mf
%JO
%
cap.
,dis
c., 2
25m
mf,
%IO
%
cap.
,elec., 50mfd
25V
cap.
,elec., 50mfd,
25V
cap.
,dis
c., 4
7mm
f,%
10%
cap.
, dis
c., 4
7mm
f,%
10%
cap.
,dis
c., .
025m
fd,
GM
Vca
p.,d
isc.
, .02
5mfd
, GM
Vca
p.,d
isc.
, .02
5mfd
, GM
Vca
p.,d
isc.
, .02
5mfd
, GM
Vca
p.,e
lec., 40-40-20mfc!/350- 3
50-4
00V
cap.
, ele
c., 30mfd,
..uJO
Vca
p., e
lec., 3Qmfd,
4OQ
Vca
p., m
olded, .03
mfd
OO
OY
cap.
, dis
c., .
00
12 m
fd, %
10%
cap.
,dis
c.
, .
0012
mfd
%1O
%ca
p.,d
isc., 47mmf,
%JO
%ca
p.,d
isc., 47mmf,
%10
%ca
p., d
isc.
, .O
25m
fd, G
MV
cap.
, dis
c., .
025m
fd,
GM
Vca
p.,d
isc.
, . O
J m
fd,%
l0%
cap.
, di
sc..
. 0Im
fd%
10%
aux A -
chan
nel I
aux B -
chan
nel I
MO
DE
L H
f-
Des
criJ
'tion
~~~
d'l
"JI0
,-:I
ll"J
I2 JI3
..J14 :)15
-116 RJO RlI
R12
RI3
aux A -
chan
nel 2
DUX B -
chan
nel 2
mul
tiple
xm
ic -
chan
nel I
phono - channel I
tope -
chan
nel I
mic - channel.
phono -
chan
nel 2
tope -
chan
nel 2
tope
out
put -
cha
nnel
2to
pe o
utpu
t - c
hann
el I
ac p
awer
res., IMQ.
I/2N
, %
10%
res., JMQ,
I/2N
, %
JO%
res., 1OKD. I/
2N,
%10
%res., 10KD. I/
2N,
%10
%re
s.,
200KD. I/2N, %
5%
res., 200KD.J(2N, % 5%
res.
,2K
n,J(
2N,%
10%
res.
,2.
2KD
.I/2
N, %
10%
res., IMQ,
I/2N
, %
10%
res., JMQ,
I/2N
; %
10%
res., 200KQ, I/
2N,
% 5
%re
s.,
200KD. I/2N, %
5%
res.
7KD
.I/2
N,
%JO
%
R71
4"5
';'
JI4
R59
C31
';'
JI5
R58
C18
C32
R32
R42
';'
'IV
R60
R61
R62
R63
RJ4
RJ5
R16
R17
RJ8
R19
R20
R2l
;:.oR
22R
23R
24
--rt
25 R26
R27
R28
R29
--R
30 R31
-- R
32R
33R
34R
35R
36R
37R
38
Des
cri
tion
Des
crip
tion
5ym
Des
crip
tion
res.
, 4.7KD. I/2N, %
10%
R39
res"
470K
D.
I/2W
,%10
%R
64pat., 1O0Q
res., 9OKD.
I/2N
, %
5%
R..u
Jres., lOKn, J(2W,
%10
%R
65re
s., 3
30K
Q, I
/2W
, %10
%re
s., 9
OK
D. J
(2W
, % 5
%R
4lre
s., 1
0KQ
, I/2
W, %
IO"k
R66
res.
, 330
KQ
, 1/2
W, %
10%
res., lOOKQ, I/2N, % 5%
R42
res.
, 1,8
Kn, I/2W,
% 5
%R
67re
s., 2
.2MQ, I/2W, % 5%
res.
, 100
KQ
,I/2W
, % 5
%R
43re
s., 1
. 8K
D.I
/2W
,%5%
R68
res.
, IO
OK
Q, I
/2W
, :10
%..1
f37C
..1f
378
.1f3
7A ..
1f38
res.
, 68K
Q,
I(2W
, :10
%R
44re
s., 100KQ, I/2W,: 5%
R69
res., 1O0KQ, I
/2N
, :1
0%res., 68KQ, J(
2N,
:10%
R45
res., 100KQ, I/
2N,
R70
res.
, 6, 8
KQ
, I/2
W, :
10%
res.
,2M
Q,J
(2W
,:5%
R46
res.
, 100
KD
. I/2
W,: 5%
R71
res., 6.8
KQ
, 1/2
N, :
10%
pot.
, 750
KQ
line
ar, d
ual
R47
res., lOOKD. I/2W,%
5%
-51
switc
h, in
put s
elec
tor
pot.,
750
KQ
line
ar, d
ual
R48
res., 330KQ, I/2W,
:10%
switc
h, f
unct
ion
sele
ctor
pat., 250KQ, audio, dual
R49
res.
, 330
KD
. I/2
W,:
10%
switc
h, s
lide,
DPD
T
pat., 250KQ, audio, dual
R50
res.
, 33O
KQ
, 1(2
W,:
10%
switc
h, 5
P5T
, por
t of
R32
, re
s., 1
50K
Q,I/
2N, %
10%
R51
res., 330KD.J(2W,
"'10
%-5
5sw
itch,
slid
e, 5
PDT
res., 150KQ,I/2N, "'10%
R52
res.
, 1O
KD
. J(2
W,"
'10%
--V
Itube, 12AX7
res.
, 8K
D.I
/2N
, "'
10%
R53
res., lOKQ, I/
2N,%
10"k
tube, 12AX7
res., I. 8KQ,
I/2N
, %
10%
R54
res.
, 10K
D. I
/2W
,%10
%...
V3
tube, 12AU7
pot., IMQ, linear, concentric
R55
res., lOKn, I/2W,
:10%
tube
, 12AU7
pat., lMQ, linear, concentric
-R56
res., 165Q,
!NI,
.V5
tube, 12AX7
pat.
500K
D.
linea
r, c
once
ntri
c- R57
res., 165Q,
!NI,
5%.
"-...
V6
tube
, I 2A
X7
pot., 500KQ, linear, concentric
R58
res., 22KQ,
I/'M
, % 5
%""
V7
tube
, ELM
res., lOOKD. I/
2N"'
10%
R59
res., 22Kn,
I('M
, % 5
%-V
8tu
be, E
LMre
s., lOOKD. I/
2N,"
'10%
R60
res.
, 68K
Q,
I/2W
, :10
%-V
9tu
be, E
LMre
s., 3
. 3Kn, I/2W,
%JO
%R
61re
s., 2
2KQ
,IW
, :10
%-V
IOtu
be, E
LMre
s., 3
.3K
QI/
2N,"
'lO"k
R62
res.
, 7K
D.
I/'M
, :10
%...
.VII
tube, EZ81
res_
, 470
KQ
, I/'M
, "'IO
%=
-R63
res.
, 350
Q,
lOW, %10%
......
.VI2
tube, EZ8J
DU
AL
14 W
AT
T H
I-
----
VllV
I2
STE
RE
O A
MP.
PRE
AM
P
(g)
1958
(jW) SpOJOj O
J::J!W L
::: (jww) SpOJDj
OJ::J!W
-OJ::J!W
000
000(~W
) wlj06aw
L :: (~)I) s
wljolPI OOOL :: (~
)
swljo
000000
-IOS
6u!aq tU!o! aljt puo tJod aljt
uaaM,Jaq peal aljt Plolj
tJod 0 Ot asol::J 6upap
-IDS
am nOA jl '
UM
OP
)joaJq JO '6uH
OO
::J aAlpatoJd Jlaljt asool l anlO
A a6uolj::J
JaljHa A
OW H Ot papauuo::J StJod aljt
tUIO
! 0 Ot pal Iddo S
! toalj lj::Jnw
oct puolj Jaljto aljt uo . A
JOPO
jSHoSun S! lj::JIljM
tU!oJ U
ISOJ 0 6UHo::J!PUI
' AaJ6 puo
pamdJoaddo II!M
tU!o! aljt ' pa!lddns S! toalj aitH
I OOt jl '
toalj lj::Jnw oct puo
toalj alH!I OCt ~pap!OAO aq Ot sawaJtxa
OM
,J aJO
aJalj1 . paloo::J solj Japlos aljt
ualjM AU!ljS puo ljtoows S! tU!o! 6uHI nsaJ aljt toljt adS Ot )j::Jalj::J pU
O SM
Olj Japlos
aljt IHun U
OJ! 6upaplos aljt a
AOWaJ tau 00 'jlasH tUlo! aljt WOJj toalj aljt Aq
patlaw SI Japlos aljt tO
ljt os(UOJ! aljt uo tou) tU!oJ aljt uo Japlos aljt a::Jold puo
SttOM OOL uoljt Jallows ou '
uoJ!6upaplos pauuHA
lljsaJj ' uoal::J 0 asn 'uo!pau-uO
::J 10::J!uolj::Jaw po06 0 jO
u!otJa::J 0 a)jow 6upaplos aJojas '
UO
!SOJJO
::J snop-as asno::J UO::J xnlj ppo a::Juls X
n1:1 01:)"'1' ~O
~3G10S 3~0) ODV' 35n 53)
NV
'1SW
n)~I) O
N ~
30Nn '
sadApollwIs JO "
aJo::JHlnw
" U!S
J3 ' " aAI:I-u!sa~"
Jatsa)l so lj::Jns saxnH patO
A!pO
Mau aljt 6UIU!Otuo::J dUO AlqOJajaJd
1NO
~3G10S 3~0) NISO~
::10 30V'~
D 153S
3H1 3S
n :SlN
IH N
OI1)n~
lSN
O)
su!d ta)j::Jos aljt Ot 6U
HJoljS
lOt
uapp::Jo tuaAaJd O
t S!ssolj::J aljt pJO
MO
t sta)j::Jos aljt uo sqOt 6nl punoJ6 aljt puas
Japlos puo pauuo::J suoaw (S
) UO
HO
!AaJqqo
~l (papauuo::J uaaq aA
olj spoal Jaljto I!tun) Japlos taU op tnq pauuo::J suoaw
(j) UOHO!AaJqqo alj1 :atoN
' paH!W
O aq A
OW
sl!otap 6UP!M
JO 6uH
unow jO
uo!wadaJ A
JOS
sa::Jauun I papMoJ::Juns6u!M
OJpaljt d3a)j01 '
sMollOj ampa::JoJd 6u!
J!M puo 6uH
unow datS
- Aq-
dats ataldwo::J aljl :3~nG
3)0~d NO
I1)n~1SNO
)
'AtPodo::J JO
a::JuotSlsaJ ssaJdxa Ot pasn sH
un aljt uaaM,Jaq sd!ljsuoH
olaJ6U
!MO
IIOj aljt atO
U asoald ' patupd san l
oA J!aljt aAOlj SA
OM
IO II!M
S::JHA
loJpala
puo SJOH::Jodo::J ::Js!pSOaJaljM '
papo::J JOlo::J aq t
au AOW
JOA
OW
SJO
t!::Jodo::JJolnqnt
parlow tO
ljt oslo ~patu!Jd sanloA J!aljt aA
olj Jots!saJ %L
SO
aJaljM papo::J JO
lo::,
aJO
SJots!saJ %
OZ
puo '
%O
L
%~
tDljt PU
!W U
! daa)j 'UOHo::J!jHuap! p!doJ U!
P!O 01 '(jww) SpOJOjOJ::J!W-OJ::J!W ~uo!lI!W auo O
t lonba S! (jw) pOJOjOJ::J!W auo
toljt oslo alaN 'AlaA!padsaJ SpOJOj OJ::J!W-
OJ::J!W
JO sw
ljo U! anloA
aljt U!O
tqo Ot
puosnoljt dUO
Aq pa!ldH
lnwaq tsnw
anloA 10::J!Jaw
nu patupd aljt toljt sato::J!pU
! SjO
H::Jodo::J JO
SJots!saJ uo p
uo (OOOLX) JalldHlnw 0 S! )I Jattal aljl '
patu!Jc.:
s6UHOJ puosanloA J!aljt aA
oljtnq I papo::J JOlo::J aqtO
UA
oW uaA
!6 S! 6u!po::JJO\0::J
lj::J!ljM JO
j stJod aljt jO A
UO
W
AJaA
tD
ljt atou asoald :NOll V')I:lIlN301 Sl~V'd
%O
~-puo %
OO
L+
Allonsn S! S::JH
AloJpala JO
j a::JuoJalot aljt puo 'JatoaJ6 AlloHUOtS
'Ins aJO SJOH::Jodo::J Jadod uo sa::JuoJal01 . ~)lZ
' ~ puo ~)lZ'V uaaM,Jaq aJaljM
AU
O aJnsoaw
AO
W Jots!saJ%
OL =
F I ~)lL'
aljt ' aldwoxa Jo:l ' a::JuoJalot t!n::JJ!::J
alqoMollo aljt U
!ljHM
A
JOA
II!M tuauodwo::J 0 jO anloA aljt toljt pu!j II!M
noA
sa::JuOtsw
n::JJp AU
O Japun xnH
atsod JO P
!::Jo
asn Wu 00
. Japlos aJo::J
xnH ::JH
aljtUA
S tualoA!nba JO U
!SOJ A
Hlonb l
j6!H .
sJa!ld soD '
(SHOM ~~) U
OJ! l!::Juad JO
' un6Japlos JO ' (S
HO
M O
OL) U
OJ! 6upaplos .
SJaHn::J lou060!0
9 JO t;; - sJa!ld asou6u01 .
apolq ,,8/L - JaAppMaJ::JS
apolq "V/L ot 119L/~ - JaAppMaJ::J5 . L
tJolj::J r-ape:;. JO
lo::J aljt JO SWOJ6OlP 10pop!d aljt O
t JajaJ StJod AUO 6U!AjHuapI alqnoJt
aAolj noA jl 'S!ssolj::J aljt Ot
patunow
aJO
toljt stJod asolj t 6u!pnl::Ju! ts!I stJod aljt
tSUl060tJod lj::J09)j::Jalj::J puo A
I InjaJo::J t!)j aljt )j::Jodun :1()I 3H1 D
NI)I)V
'dNn
SIOO
t AJotuawalddns Injasn
AJaA
oslo
aJO
Jaddpts aJ!M 0 puo saw
u!ds jO tas V
'
UM
OljS
tnoAol s.llod puo aJ!M
aljt 6u!MO
IIOj aljt A
q pa::JnpaJ
aq II!M JOJJa 6U!J!M 0 6UlpU!j joA
tln::J!H!paljt puopaA
oJdw!aq II!M
tuawnJtsul
pataldwo::J aljt jO a::JuoJoaddo aljt Alu!opa::J puo l uosoaJ po06 0 JO
j UM
OljS so
pa::Jold aJO
saliM
uatjO A
JaA ' alq!ssod so A
lasol::J so SWOJ60!p 10!Jop!d aljt U!
UM
OljS
tnOA
ol StJod pU
O aJ!M
aljt MO
llOj nO
A tO
ljt AI6U
OJtS
a6m aM
aJoW
Jaljtm::l
. Jalj!ldwo aljt jO
uo!pnJtsuo::J aljt JOj paJ!nbaJ
aJO
sloat ::J!soq asalj1 :G3~lnO
3~ 51001
)ISV'S
. 6UP
!M puo A
lqwasso JadoJd JO
j
Amssa::Jau awH aljt 110 a~ot Ot
tnq uoH::JnJtsuo::J aljt ljsnJ tO
U O
t nOA
a6Jn aM
. tuawnJtSU
! S!lj Ul a::Juapuuo::J J
atoaJ6 puo a::J!A
Jas AJO
PO
jSH
OS
jO S
JoaA A
UO
W ljH
MJopnJtsuo::J aljt pJO
MaJ II!M
tuawnJtSU
! slljt jO Uo!pnJtsuo::J aljt U! ua)jot
ale)sW
OJ6O
IP aljt U! U
MOljS so patnOJ SI peal aljt ualjM
ljt6ual paJ!nbaJaljt paulW
Jatap aAO
lj nOA
IHun peal A
UO tn::J tOU 00 'AJOssa::Jau ualjM ljt6ual
JadoJd ayt Ot paW
wpt aq PlnoljS spoal asalj1 '
paJlnbaJ UOljt Ja6UOI uauo
aJO
SJaWJO
jSUO
Jt pUO
'S
JOH
::Jodo::J ' SJOts!saJ uo spoal aljt tO
ljt patou aq oslo Plnoljs
. JaplOS M
au asn ot aJns aq
tUIO! 0 JaplosaJ O~ AJOssa::Jau sl t! U
OS
oaJ AU
O
JOj jl 'patOaljJaAO Alnpun 6u!aq WOJj tuauodw
o::J aljt tuaAaJd p
UO AOMO toalj
aljt pnpuo::J 111M SJaiid alj1 'SJalld asou6uol jO Jlod 0 jO dH aljt ljH
M paJap
H SM
OllO
j puo H sapa::JaJd ljtoq toljt uolpas N
Oll
-)n~1S
NI aljt 6
ultdnJsap tnoljHM paA
OW
aJ aq AO
W puo )jooq a
ljt Ul AlloJtua::J
pato::Jol SI U
o!pas NO
Il)n~1S
NO
) aljt toljt atON
' uoH::Jas N
OI1)n~15N
O)
aljt 6UIMOilOj sa60d aljt uo saw
nsaJ uolpas NO
I1)n~15NI alj1 ' ('::Jta ')2:
)L)
),, Aq paM
olloj sJaqwnu a60d aA
olj Uo!pas S
!ljt U! sa60d IIV
' 'uolpas
NO
Il)n~15N
OJ aljt S! a60d S!ljt ljH
M 6uluu!6aq lonuow
aljt jO U
o!pas alj1
SN
OU
Jn'H.1S
NI 'V
'H:lN
:I!)
TB
20
to.)
TB
21
XV12 -
XV
ll
TB
ll
8 '
'-'.) !'
Fig. 1
-$-
-$-
TB
19
XV
10
XV
9
TB
14
TB
18
TB
5
TB
13
TB
17
TB
4
TB
1
TB
2
XV
8
-Jl1
1213
.J89
10T
B3
XV
6
BE
LOW
CH
AS
SIS
ASS
EM
BL
Y9.
hlg.
1. Mo,nt the 5
wew
te
,mln
all""
"d, T
B2,
'" ,h
awn.
U,e two
#6-3
1 sc
rew
s, tw
o #6
lock
was
hers
and
two
#6-32 hex nuts. Under the lo
ck-
was
her, mount one post rig
ht w
ith g
roun
d te
rmin
al s
trip
, TB
3. U
nder
the
re-
mai
ning
"nut, mount a #6 ground lu
g.
10.
j,
Fig. 1. M
ount
the
fuse
hold
er, X
FI, a
s shown. Use ru
bber
was
her
against the outside of the chassis under the w
ider
par
t of
the
hold
er. S
lide
the
larg
e nu
t ove
r th
e fu
seho
lder
on
the
insi
de o
f th
e ch
assi
s. D
O N
OT
tigh
ten
nut.
11.
Fig. 1. Push a rubber grommet into the 3/8" ho
le n
ext t
o th
e fu
se-
hold
er.
12. ~g
. 1. M
ount
the
conv
enie
nce
outle
t, J1
6, a
s sh
own.
Use
two
#6-
scre
ws,
(tw
o #6
lock
was
her
and
two
#6-3
2 he
x nu
ts.
13. t
h Fig. 1. M
ount
the
30 mfd, 400 V electrolytic ca
paci
tor,
C38
, as
show
n. U
se o
ne #
6-32
scr
ew, o
ne #
610c
kwas
her
and
one
#6-3
2 he
x nu
t. N
ote
dire
ctio
n/of
pos
itive
sid
e.
14.
Fig. 1. M
ount
the
30m
fd, 4
O0V
ele
ctro
lytic
cap
acito
r, C
39, a
ssh
own.
Use
one
#6-
32 s
crew
, one
#6
lock
was
her
and
one
#6-3
2 he
x nu
t. N
ote
direction of positive side. (I
t is
the
reve
rse
of C
38 in
ste
p 13
abo
ve.
15.
(I)
Fig. 1. Mount hu
m b
ucki
ng p
oten
tiom
eter, PM,
as s
how
n. U
se o
ne3/8" lockwasher and one
3/8
hex nut. Between the po
tent
iom
eter
and
the
chassis, uJe one 3/8 pot ~rounding lug. W
hen
tight
enin
g po
tent
iom
eter
, line
up th
e lu~ with terminal 2. The grounding lug will eventually be soldered to
this
term
inal
.
16. (
\4 F
ig. 1
. Mou
nt th
e fo
llow
ing
term
inal
str
ips
as s
how
n. U
se o
ne #
6-sc
re;J
;/)on
e #6
lock
was
her
and
one
#6-3
2 he
x nu
t on
each
. The
term
inal
str
ips
to be mounted in th
is m
anne
r ar
e: th
ree
post
, tw
o le
ft, TB5; two post, TB6;
two post, TB7; two post, 188; three post, two right, TB9; one post6
1eft
with
ground)' TBI0; three post, two right, TBIl; four post, TB12; two post, TB13;
four
pos
~, 1
814;
one
pos
t lef
t, T
B 17; three post, two right, TB 18; on
e po
st le
ftw
ith g
roun
d; T
B19
; on~
pos
t rig
ht w
ith g
roun
d, T
B20
, and
two
post
rig
ht, T
B21
.
Not
e: In
addition to Fig. 1, it
will
be
requ
ired
to r
efer
to F
ig. 6
in th
e fo
l-lo
win
g m
ount
ing
proc
edur
e in
ord
er to
set
tle s
uch
mat
ters
as
orie
ntat
ion
ofterminal boards, keyways on tube sockets, etc. T
he w
irin
g w
hich
com
es la
ter
will
be
grea
tly f
acili
tate
d if
, aft
er m
ount
ing
each
par
t, th
e sy
mbo
l num
ber
ofth
e pa
rt is
writ
ten
on th
e bottom of the chassis next to the pa
rt w
ith a
cra
yon
soft
pen
cil.
v(
Fig. 1. Mount the 9 pin miniature tube socket, XV12, as shown. Use
two #4-40
scr
ews,
two
#4 lo
ckw
ashe
rs, a
nd tw
o #4
-40 hex nuts. Note the
mou
nti j9
dir
ectio
n in
fig
ure
6.2.
(/)
Fig
. 1..
Sim
ilar
to th
e ab
ove,
mou
nt 9
pin
min
iatu
re s
ocke
ts, X
VII
,X
V5,
XV
6, X
V7,
XV
8, X
V9
and
X\f
10. U
se tw
o 14
-40 screws, two #4 lock-
was
hers
, and
two
#4-40 hex nuts on each. In
eac
h ca
se)'
note
the
mou
ntin
gdi
rect
ion
in f
igur
e 6.
3.
(J)
Fig. 1. Mount the 3 terminal input jack strip, J8, 9, 10 as shown.
Use
fou
r #6
-32.
scre
ws,
fou
r #6
lock
was
hers
and
fou
r #6
-32Iiex nuts. Mount
the
3 ho
le in
sula
tor between the ch
assi
s an
d th
e input jack strip. (Fig. 10).
4. (
J, Fig. 1. Mount the 3 te
rmin
al in
put j
ack
stri
p, J
Il)'
12, 13, as shown.
Not
e m
ount
ing
dire
ctio
n in
fig
ure 10 Use fo
ur '6
-32
scre
ws,
fou
r #6
lock
-washers and four
16- 32
he
x nu
ts. M
ount
a 3
hol
e in
sula
tor
betw
een
the
chas
sis
and
the
inpu
t Jac
k st
rip.
(Fi
g. 1
0)
5. . ('~i
9' 1
. Mount the double pole 2 position slide switch, S3, into the
switc
h br
acke
t, as
sho
wn.
Use two #4-40
scr
ews,
two
#4 lo
ckw
ashe
rs a
nd tw
o#4
-40
hex
nuts
.
6. (~
ig. 1
. Mount the sw
itch
brac
ket w
ith th
e sw
itch
(pre
viou
sly
mou
nted
in s
tep
5) o
n th
e ch
assi
s, a
s sh
own.
Use
two
#6-3
2 screws, two
il6
lock
was
hers
and tWo #6-
32 h
ex n
uts.
7. (
~)
Fig
. 1. M
ount
the2
term
inal
tape
out
put j
ack
strip
, J14
, 15,
QS shown.
Use four #6-32 screws, four #6 lockwashers and four #6-32
hex
nut
s.. M
ount
a2
hole
insu
lato
r be
twee
n th
e ch
assi
s an
d th
e ja
ck s
trip
.
8. (
J) Fig. 1. Mount the 5
scre
w te
rmin
al b
oard
, TB
l, as
sho
wn.
Use
two
#6-3
2 sc
rew
s, tw
o #6
lock
was
hers
and
two
#6-32 hex nuts. Under one of the
lock
was
hers
, mou
nt o
ne p
ost r
ight
term
inal
str
ip, T
B4.
17. (
,)' F"
1. Mount the si
ngle
pol
e 2
posi
tion
sl ide switch, S5, as shown.
Use
two
\4.-40 screws, two #4 lockwashers and two #4-40
hex
nut
s.
18. ( Fig. 1. Mount the #6
gro
und
lug
"G" with one #6-32 screw, one
#6 10cKwasher and one #6-32 hex nut. N
ote
posi
tion
of lu
g on
figu
re 6
.
PREWIRING OF SELECTOR SWITCH
Tur
n th
e sw
itch
to it
s m
axim
um c
ount
er-c
lock
wis
e po
sitio
n. T
he s
witc
h is
sho
wn
in th
e fig
ure
from
the
rear
vie
w. T
he e
xact
position of the lugs referred to are
dete
rmin
ed b
y lo
okin
g at
the
switc
h fr
om th
e vi
ew shown in the figure. Each
side of the wafer has been assigned a letter. Each lug ha
s be
en a
ssig
ned
anu
m e
r. T
he lu
g is
ref
erre
d to
by
the
waf
er n
umbe
r an
d lu
g de
sign
atio
n. T
hus
lug lD-3 refers to selector switch S 1,
the
"D"
side
of
the
waf
er (
rear
sid
e of
the econd wafer-side facing you when holding th
e sw
itch
as s
how
n in
the
draw
-in
g) a
nd 3
ref
ers
to th
e lu
g on
this
par
ticul
ar s
ide
of th
e w
afer
.
1. 4) Fig. 2. Cut all leads on tw
o. 0
25m
fd(2
5Kor
25,
000m
mf)
dis
c ca
paci
-to
rs, C
45 a
nd C
46, t
o 3/
4". C
over
eac
h le
ad w
ith a
1/2
" pi
ece
of s
pagh
etti.
Con
nect
C45
from
S I
B-6 (C) to S
1 B
-7 (S 1). C
onne
ct C
46 f
rom
S I
H-7
(C
) to
S 1
~/S
1).
2. (
)) Fi
g. 2. Cut all le
ads
on tw
o 90
KQ
(w
hite
, bla
ck, o
rang
e, g
old)
5%
resi
stor
s, R
15 a
nd R16, to 1/2". Connect R15 fr
om S
lB- 3
(C
) to
SlB
-l (C).
Con
neR
16 f
rom
SlG
-2 (
C)
to S
lG-4
(C
).
3. (
d.Fig. 2. Cut all leads on two 85
0mm
f dis
c ca
paci
tors
, C9
and
C10
, to
3/4"
. Connect C9 fromS1B-3
(S2)
to S
lB- l
(C
). C
onne
ct C
I0 fr
omS
1 G
-2(C
)to
S 1
/-4 (S2).
4.
/J)
Fig. 2. Cut all leads on tw
o 2.
2MQ
(re
d, r
ed, g
reen
, gol
d) 5
% r
esis
tors
,R21 and R67, to 1/2". Connect R21 from SlB-
l (C
) to
S lC
-l (C). Connect
R67
ftm SlF-
2 (C
) to
SlG
-2 (
C).
5. (
~ Fig. 2. Cut all leads on tw
o. 0
027m
fd (
2. 7
Kor
270
0 mmf) disc capaci-
tors
, Cll
and
C12
, to
1/2"
, Cov
er e
ach
lead
with
a 1
/4"
piec
e of
spa
ghet
ti.co
nne
t 111 from SlB-
l (54
) to
SlC
-l (S2). Connect C12 from SlF-2 (S2)
to S 1 G
- (S
4).
6. (' Fig. 2. C
ut a
ll le
ads
on tw
o 10
0KQ
(br
own,
bla
ck, y
ello
w, g
old)
re
sist
ors)
' R17
and
R18
, to
1/2"
. Connect R17 from SlB-
12 (
C)
to S
lC-1
2 (C
).Connect;R18 from SlF-
l (C
) to
SlG
-l (C).
7. ('
Fig. 2. Cut all leads on two 47
mm
f di
sc c
apac
itors
, C43
and
C44
,to
3/
)ft.
Con
nect
C43
fro
m S
1 B
-12
(S2)
to S
lC-1
2 (S2). Connect C
44 fr
omS
1 F-
:Sf)
to
S 1
G-1
(S
2).
8. ( /Fi9. 2. Cut all leads on tw
o 60
0mm
f di
sc c
apac
itors
, C13
and
C14
,to 3/4". Connect C13 frcm SlB-4
(Sl)
to S
lC-4 (C). Connect C14 from
SlG
-5 (
Sl)
to S
lF-5
(C
).
R15 ell
R21
Fig.
2
9. J) Fig. 2. Strip back the outer in
sula
tion
1 1/
2" f
rom
one
end of a 10"
piece of 3 conductor shielded cable. Twist th
e sh
ield
str
ands
toge
ther
and
cover with a 1 1/4" piece of thick spaghetti. Cut the br
own
lead
to 1
1/4
"th
e re
d le
ad to
3/4
" an
d th
e or
ange
lead
to I"
. Strip ba
ck th
e in
sula
tion
1/4"
from the end of each of these leads. C
onne
ct th
e br
own
lead
to S
lB-6
(S2)
,the red lead to S 1
B-8
(S 1), the orange lead to S 18-9
(S 1
) an
d th
e tw
iste
dsh
ield
str
ands
to S
lA-1
0 (C
). O
n th
e ot
her
end
of th
e sa
me
piec
e of
shi
elde
dca
ble,
str
ip th
e ou
ter
insu
latio
n ba
ck 3
/4" .
Twist the shield strands together.
Stri
p k
the
in,u
laH
on 1
/4"
fwm
the
end
af e
ach
af th
e in
ne, c
ondu
ct""
.T
his
en o
f th
e ca
ble
does
not
get
con
nect
ed u
nti I
late
r.
10. i
J IF; g.
2. C
onne
ct o
ne e
nd o
f 0
3 1/
2" p
iece
of b
lock
wi '
e to
5 IA -10 (52).
11. (
Fig. 2. Strip back the outer insulation 1 3/4" from one end of a
l0"
piec
e of
the4
con
duct
or s
hiel
ded
cabl
e. T
wis
t the
shi
eld
stra
nds
toge
ther
and
cove
r w
ith a
1 1
/2"
piec
e of
thic
k sp
aghe
tti C
ut th
e br
own,
red
and
ora
nge
lead
s to
3/4
" ea
ch a
nd th
e ye
llow
lead
to 1
1/4
"S
trip
bac
k th
e in
sula
tion
1/4" from the end of each of thes~ leads. C
onne
ct th
ebr
own
lead
to S
lD-
(SI)
,the
red
lead
toS
1D- 9
(Sl)
,the
ora
nge
lead
toSl
D- 1
0(S1
)and
the
yello
lead
- to
S 1
0-11 (C). C
onne
ct a
1"
piec
eof
bar
e w
ire fr
om S
ID-l
1 (S2) to S 1 E-
(S 1
). C
onne
ct the twisted shield strands' t
o S
lC-6
(C).
On
the
othe
r en
d of
the
U'I same piece of shield cable, strip the outer insulation ba
ck 1
1/4
". Twist the
shield strands. Cut the red, orange, and yellow leads to 1". Cut the sh
ield
stra
nds
to 3
/4".
Strip ba
ck th
e in
su la
tion
1/4"
fro
m th
e en
d of
eac
h of
the
inne
rconductc?rs. This end of the cable does not get connected until la
ter.
12.
N.)
Fig. 2. S
trip
bac
k th
e in
sula
tion
1 3/
4" fr
om o
ne e
nd o
f a
9 1/
2"piece of 3 conductor shield cable. Twist the shield st
rand
s to
geth
er a
nd c
over
wIth
a 1
1/2
" pi
ece
of th
ick
spag
hetti
. Cut
the
brown and red leads to
3/4"
and
the
oran
ge le
ad to
1" .
Strip ba
ck th
e in
sula
tIon
1/4"
from
the
end
of e
ach
of th
ese
lead
s. C
onne
ct th
e or
ange
lead
to S
1 F
-12 (S 1), the red lead to S 1
F-l 0
(Sl)
, the
bro
wn
lead
to S
lF-9
(Sl)
and
the
twis
ted
shie
ld s
tran
ds to
SlF
- 6 (
C).
On
the
othe
r en
d of
the
sam
e pi
ece
of s
hiel
ded
cabl
e, s
trip
the
oute
r in
sula
tion
back
1 1
/4" .
Tw
ist t
he s
hiel
d st
rand
s. C
ut th
e sh
ield
str
ands
, red
lead
and
oran
~e
lead
to 3
/4"
and
the
brow
n le
ad to
1" .
Strip ba
ck th
e in
sula
tion
1/4"
from f~e e?d of each of the inner conductors. This end of the cable does not
get co~n
eqte
d un
til la
ter.
13. ~
~F!~
2. Connect one end of
a 4
1/2
" pi
ece
of b
lack
wire
to S
lF-6
(C).
, /i
V I
14 (V
)\.F
iS
1 F-
6 (Si3)
2. Connect a 1
1/2"
pie
ce o
f bar
e w
ire fr
om S
lC- 6
(S2) to
15. (,) Fig. 2. S
trip
bac
k th
e ou
ter
insu
latio
n 1
1/4"
fro
m o
ne e
nd o
f a
7 1/2" piece of 3 conductor shield cable. Twist the shield strands together,
and
cove
r w
ith a
1"
piec
e of
thic
k sp
aghe
tti. C
ut th
e or
ange
and
red
lead
s to
3/4"
and
the
brow
n le
ad to
1" .
Strip the insulation ba
ck 1
/4"
from
this
end
of
each
of t
hese
lead
s. C
onne
ct th
e or
ange
lead
to S
IH-I
0 (S
1),
the
red
lead
toSl
H-9
(S1)
, the
bro
wn
lead
to S
lH- 7
(S2)
and
the
shie
ld s
tran
ds to
S1H
- ll (C).
On
the
othe
r en
d of
the
sam
e pi
ece
of s
hiel
ded
cabl
e, s
trip
the
oute
r In
sula
tion
back
3/4
". Twht the sh
ield
str
ands
toge
ther
. Str
ip b
ack
the
insu
latio
n 1/
4"from the end 9feuch of the inner conductors. This end of the cable does not
get conne
~'d
unti
I la
ter.
16. ~.
. ~ rg
. 2. Connect one end of a
2" p
iece
of
blac
k w
ire
to S
1 H
-l1 (S2).
17. t
d Fig. 2.
- C
onne
ct o
ne e
nd o
f a
2 1/
2" piece of grey wire to S 18-
11 (
S 1)
.
18. V
) Fig. 2. O
n on
e en
d of
a 4
1/2
" pi
ece
of s
ingl
e co
nduc
tor
shie
lded
cabl
e, s
trip
the
oute
r in
sula
ting
back
1/2
" . Twist th
e sh
ield
str
ands
toge
ther
and cut off: St
rip
back
the
inne
r in
sula
tion
1/4"
and
con
nect
to S
18- 5
(Sl
).O
n th
e ot
her
end
of th
e sa
me
piec
e of
shi
elde
d ca
ble,
str
ip b
ack
the
oute
r in
-su
latio
n3/4
" ; T
wis
t the
shi
eld
stra
nds
toge
ther
. Str
ip b
ack
the
inne
r in
sula
tion
1/4"
. Jhis end of the cable does not get co
nnec
ted
until
late
r.
19.
(v)
fig.
2. C
onne
cton
eend
ofa5
"pi
eceo
fbro
wnw
iret
oS1D
- 7(S
1).
20. (
'Fig
. 2. Connect one end of a 3"
pie
ce o
f br
own
wir
e to
SlF
- 8 (
SI)
.
21. (
I, Fi
g. 2. O
n on
e of
a 4
" pi
ece
of s
ingl
e co
nduc
tor
shie
lded
cab
le,
stri
p th
e ou
ter
insu
late
d ba
ck 1
/2". Twist the sh
ield
str
ands
toge
ther
and
cut
off. Strip back the inner in
sula
tion
1/4"
and
con
nect
to S
lG-6
(Sl)
. On
the
other end of the same piece of cable, st
rip th
e ou
ter
insu
latio
n ba
ck 3
/4"
Twist the shield strands together. St
rip
back
the
inne
r in
sula
tion
1/4"
. This
end
of t~
e ca
ble
does
not
get
con
nect
ed u
ntil
late
r.
22. (
/) F
ig. 2. C
onne
ct o
ne e
nd o
f a
3" p
iece
of
grey
wir
e to
S 1
G- 1
2 (S
1).
23. (
~/F
ig. 2
. Connect on
e en
d of
a 5
" pi
ece
of g
rey
wir
e to
SlD
- 3 (
Sl)
and
one
end
of a
5"
piec
e of
yel
low
wir
e to
SlE
-4 (Sl). Twist the two leads
toge
ther
. .
24. (
v)
Fig
. 2. C
onne
ct o
ne e
nd o
f a 4
1/2
" pi
ece
of g
reen
wir
e to
S 1
C-2
(S 1)
and one end of a 4 1/2" piece of blue wire to
S lC
-4 (S2). Twist the two
lead
s to
g/et
her.
25 (vfFi9. 2. Connect one end of a
5 1/
2" p
iece
of b
row
n w
ire to
S 1
E- 3
(S 1)
and
one
end
of a
5 1
/2"
piec
e of
whi
te w
ire
to S
lF- 5
(S2). Twist the two
leads together.
TB
16 XIl
R32
R33
R30
R31
R23
R22
XV
3
R24
R25
(ii)
J)
CJI
~
=$=
J123
4J5
67 I 'X
V2
XV
1
XV
4
(37
TB
I5
Fig.
TOP OF CHASSIS ASSEMBLY
11. (
\.fi F
ig. 3
. On
the
pow
er tr
ansf
orm
er, 1
1, c
ut b
oth
gree
n le
ads,
the
red-
yello
w le
ad a
nd th
e w
hite
lead
to 2
1/2
"; b
oth
yello
w le
ads
to 3
1/2
"; b
oth
red
lead
s an
d bo
th b
lack
lead
s to
5 1
/2" .
Mou
nt th
e po
wer
tran
sfor
mer
as
show
n.P
ositi
on s
o th
at th
e gr
een
and
yello
w le
ads
face
the
cent
er of the chassis (see
figure 6). Use three #8 lockwashers and three #S-32
hex
nut
s on
thre
e of
the
scre
ws.
On
the
four
th s
crew
, use
one
#S
grou
ndin
g lu
g an
d on
e #S
-32
hex
nut.
12.
(V)
Fig. 3. O
n th
e ou
tput
tran
sfor
mer
, T2,
cut
the
blac
k, b
row
n, g
reen
,or
ange
and
yel
low
lead
to 4
". C
ut th
e bl
ue, r
ed a
nd b
row
n-ye
llow
lead
to 3
"M
ount
the
outp
ut tr
ansf
orm
er a
s sh
own.
Pus
h th
e re
d, b
lue
and
brow
n-ye
llow
lead
s th
roug
h ho
le "Z" nearest the power transformer m
ount
ed in
ste
p 11
. Pus
hth
e ot
her
lead
s th
roug
h th
e ho
le "
. Use four #S-
32 s
crew
s, o
ne #
S lo
ck-
was
her,
two
#S g
roun
d lu
gs, a
nd o
ne c
able
cla
mp.
Sec
ure
each
with
a #
S-
hex nut. SI ide all le
ads
from
hol
e " Y" under the cable clamp before tig
hten
,..ing. Se
7'Fi
g. 8
.13
. Fig. 3. O
n ou
tput
transformer, T3, cut the orange, yellow, red
and
gree
n le
ads
to 6
". Cut th
e br
own
lead
to 5
". Cut the blue and brown-
yello
w le
ads
to 4
". Push the red, blue and brown-ye
llow
lead
s th
roug
h ho
le. Push the other leads through hole "
. Use four #S-
32 s
crew
s, th
ree
#S lo
ckw
ashe
rs a
nd fo
ur #
S-32 hex nuts. Under two of the lockwashers, mount
the shield. U
nder
the
nut w
ithou
t the
lock
was
her,
mou
nt th
e ca
ble
clam
p. O
nth
e to
p of
the
chas
sis,
mou
nt a
cab
le c
lam
p un
der
one
of th
e sc
rew
hea
ds. D
ono
t tig
hten
this
scr
ew y
et. R
un all leads from hole "
unde
r th
e ca
ble
clam
punder the chassi~ in the direction sh
own
in fi
gure
S. T
ight
en a
ll nu
ts e
xcep
tth
e on
e h9
1din
g th
e cl
amp
on th
e to
p si
de o
f th
e ch
assi
s.14
. (u
.y
Fig. 3. M
ount
the
elec
trol
ytic
can
cap
acito
r, C
37, a
s sh
own.
Infigure 6. note the direction of the half m
oon,
squ
are
and
tria
ngle
nea
r lu
gs to
dete
rmin
e di
rect
ion
of m
ount
ing.
Ins
ert t
he m
ount
ing
tabs
into
the
slot
s in
the
chassis and twist the tabs so
mew
hat l
ess
than
a q
uart
er tu
rn. D
O N
OT
twis
tthe tabs e?,cessively or they will shear off. S
olde
r th
e ta
b w
ithou
t a h
ole
tothe cha~r.is
at i
ts s
lot.
15. ~,~ Fi~. 3. Insert the pilot light, 11, into the pilot light assembly, XI1.
Scre
w th
e as
sem
bly
to th
e ch
assi
s as
sho
wn
usin
g on
e #6
-32
scre
w, o
ne #
6 lo
ck-
washer an~ one #6-32 hex nut. Tighten the mounting screw and nut after the
pilo
t li 9
~f h
as b
een
lined
up
with
the
hole
in th
e fr
ont c
hass
is a
pron
.16
. (\
V
Fig. 3. M
ount
the
inpu
t bra
cket
as shown. Use two #6-32 screws,
two
#6 lo
ckw
ashe
rs a
nd tw
o #6
-32
hex
nuts
. Fol
low
arr
ows
to m
ount
ing
hole
s.17
. (\ )
/Fig
. 3. M
ount
the
four
term
inal
inpu
t str
ip, J
1,
4, as shown.
Use fdJr #6-32
scr
ews,
fou
r #6
lock
was
hers
and
fou
r #6
-32 hex nuts. Use a
four
hol
e il'
1sul
ator
bet
wee
n th
e in
put s
trip
and
the
inpu
t bra
cket
.IS. ( 1/F
ig. 3
. Mou
nt th
e th
ree
term
inal
inpu
t str
ip, J
5,, 7
, as
show
n. U
sefo
ur #
6-31
scr
ews,
fou
r #6
lock
was
her
and
four
#6-
32 hex nuts. Use a three
hole
inU
ato
r be
twee
n th
e in
put s
trip
and
the
inpu
t bra
cket
.19
. (\
) F
ig. 3
. Mou
nt th
e ca
ble
clam
p on
the
uppe
r le
ft h
and
corn
er o
f th
e fr
ont
apron~ s shown. Use one #8-
32 s
crew
, one
HS
lock
was
hera
nd o
ne #
S-3
2 he
x nu
t.
1. (~g
. 3. Mount th
e 9
pin
min
iatu
re tu
be s
ocke
t with
shi
eld
supp
ort,
XV
2, fr
om th
e to
p of
the
chas
sis.
Use two #4-40 screws, two #4 lockwashers,
and
two
#4-4
0 he
x nu
ts. .
Not
e m
ount
ing
dire
ctio
n In
fig
ure
6.2.
(\ ~
Jig
. 3. Similar to the above, m
ount
the
9pin
min
iatu
re tu
be s
ock
etw
ithsh
iele
t---
sup
port, XVl and XV3, from the top of the chassis. Use two #4-
screws, two~
#4 lo
ckw
ashe
rs a
nd tw
o #4
-40 hex nuts on each. Note mounting
dire
ctio
n~ig
ure
6.3.
("
Fig. 3. Similar to
the
abov
e, m
ount
the
9 pi
n m
inia
ture
tube
soc
ket
with
shi
eld
supp
ort,
XV
4, fr
om th
e to
p of
the
chas
sis.
Use
two
#4-40 screws,
two
#4 lo
ckw
ashe
rs a
nd tw
o #4
-40
hex
nuts
. Not
e m
ount
ing
dire
ctio
n in
figu
re6. Un~erone of th
e lo
ckw
ashe
rs, u
nder
the
chas
sis,
mou
nt I
J tw
o po
st r
ight
term
i":~1 strip, TB 15.
4. ('1 Fig. 3. M
ount
the
dual
con
cent
ric tr
eble
con
trol
pot
entio
met
er w
ithon-off switch, R32, R33, S4
, as
show
n. Slide the locating lug on the poten-
tiom
eter
into
the
smal
l hol
e ad
j ace
nt to
the
mou
ntin
g ho
le. U
se one 3/Slock-
washer aJld one 3/S hex nut (stock# lS047).
5. (01 Fig. 3. M
ount
the
dual
con
cent
ric
bass
control potentiometer, R30,
R31
, as
show
n. S
lide
the
loca
ting
lug
on th
e po
tent
iom
eter
into
the
smal
l hol
ead
jace
nt to
the
mou
ntin
g ho
le. U
se one
3/S
lockwasher and one
3/8
hex
nut.
(sto
ck#
JS04
S)6.
(L.
) F
ig. 3
. Mou
nt th
e du
al 2
50K
Q le
vel c
ontr
ol p
oten
tiom
eter
, R24
, R25
,as
sho
wn.
Slid
e th
e lo
catin
g lu
g on
the
pote
ntio
met
er in
to th
e sm
all h
ole
ad-
jacent to the mounting hole. Use one 3/8 lockwasher and one
3/S
hex
nut.
(stock# )SO46)
7.
(\y
Fig. 3. M
ount
the
dual
750
KQ
focus control potentiometer, R22, R23
into
the
smal
l hol
e ad
jace
nt to
the mounting hole. Use one 3/SIockwasher and
one 3
~ex nut (stock# 18045).
8. (
ig. 3
. Mou
nt th
e fu
nctio
n se
lect
or s
witc
h, S
2, a
s sh
own.
SI i
de the
locati g lug on the switch into the small hole adjacent to the m
ount
ing
hole
.Use one 3/S lockwasher and one
3/8 hex nut.
9. (
) Fi
g. 3. M
ount
the
inpu
t sel
ecto
r sw
itch,
Sl,
as s
how
n. Slide the
loca
ting
lug
on th
e sw
itch
into
the
smal
l hol
e ad
jace
nt to
the
mou
ntin
g ho
le.
Use one
3/S
10ckwClsher and one 3/
8 he
x nu
t.10
. (\
.) F
ig. 3
. Mou
nt th
e tw
o po
st te
rmin
al s
trip
, TB
16,
as
show
n. U
se o
ne#6
-32 screw, one #6 lockwasher and one #6-
32 h
ex n
ut.
NO
TE
: Before the next step, re
mov
e th
e fu
seho
lder
mou
nted
in s
tep
10, o
npa
ge 3
C. A
fter
com
plet
ing
step
lIon
this
. pag
e (p
age
7C),
rem
ount
the
fuse
-holder as indicated in step 10 on page 3C.
Thi
s tim
e, tighten the nut but do
not tighten too much or holder will crack. N
ext,
cont
inue
with
ste
p 12
0n th
ispa
ge (
page
7C
), a
nd f
ollo
w th
e no
rmal
seq
uenc
e of
ste
ps.
R32
R33
ffi10
\0 0
eOe
Top
Shi
eld
eOe
~IC
J~iii
eOe
eOe
0 eOe
eOe
Fig.
4
TOP OF
CH
AS
SIS
WIR
ING
1.
(v)
Fig. 4. Run the four conductor cable from switch wafer, SlD an
d th
eth
ree
cond
ucto
r ca
ble
from
sw
itch
waf
er, S
1 F
alo
ng th
e to
p of
the chassis. Run
thes
e un
der
the
cabl
e cl
amp
mou
nted
on
the
outp
ut tr
ansf
orm
er, T
3, a
nd ti
ghte
nth
is s
crew
. Con
nect
the
oute
r sh
ield
from
the
four
con
duct
or c
able
to Jl, 2, 3,
6 (C
).; The four leads from the cable are co
nnec
ted
as fo
llow
s:(i
f brown to Jl,
1 (Sl)
CY
ora
nge
to J
l, 2,
3,
5 (S
l)(\
:) r
ed to
J1, 2,
3 (Sl)
() ye
llow
to J
l, 2,
3,
7 (S
l)
2. ("
') F
ig. 4
. Connect a 1" piece of black wire from J 1
6 (S2) to
J 1,
4 (C
).
3. () Fig. 4. Connect a 1" piece of bl
ack
wir
e fr
om J
l, 2,
3,
4 (S2) to
2, 3
4;"2 (Sl).
4. ~/
Fig. 4. Connect a 1 1/2" piece of bare wire covered with a I" piece
of s
pagh
etti
from
J5,
6, 7
-4 (
C)
to J
5 , 6
, 7-1
(S
1).
5.
(V)
Fig. 4. Connect the ou
ter
shie
ld fr
om th
e th
ree
cond
ucto
r ca
ble
from
waf
er S
1 F to J5,
6, 7
-4 (S2). The three leads from the cable are co
nnec
ted
asfo
llow
s:
(,-1
bro
wn
to J
5, 6
2 (S 1)
lJ/r
ed to
J5,
6, 7
-3 (S 1)
('\)/
6ran
ge to
J5,
6, 7
-5 (Sl)
6. tJ
f Fig. 4. Pu
sh th
e tw
iste
d gr
een
and
blue
lead
s (o
rigi
natin
g at
S lC
-an
d S
lC- 4
res
pect
ivel
y) th
roug
h th
e ho
le "
S" in
the
fron
t pan
el b
etw
een
the
two
rota
ry s
witc
hes
and
behi
nd th
e sl
ide switch)' S3.
7. (
\ ,,)
Fig
. 4. R
un th
e tw
iste
d w
hite
and
bro
wn leads (originating at S
and
51 E
- 3 r
espe
ctiv
ely)
alo
ng th
e ch
assi
s as
sho
wn.
Pus
h le
ads
tt,ro
ugh
hole
S" in
the
fron
t pan
el b
etw
een
the
two
rota
ry s
witc
hes
and
behi
nd th
e sl
ide
switch, S3.
S. '
(v)'
Fig
. 4. Cut all leads on two 6. SK
Q (
blue
, gre
y, r
ed, s
ilver
) re
sist
ors,
R70 and R71, to 1/2"
. Con
nect
one
res
isto
r from S2B-
2 (C
) to
S2B
-3 (
S 1)
and
the
seco
nd r
esis
tor
from
S2B
-9 (
S 1)
to S
2A-S
(C
).
9. (
) Fi
g. 4. C
onne
ct th
e ye
llow
lead
(fro
m th
e tw
iste
d ye
llow
and
gre
yle
ads
orig
inat
ing
at S
lE-4
and
SlD
- 3 r
espe
ctiv
ely)
to S
2A- S(S2) and the grey
lead from)he pair to S2B-2 (S2).
10. (l(Fig. 4. Push al
l the
rem
aini
ng lo
ose
lead
s fr
om in
put s
elec
tor
switc
h,S
l thr
ough
the
rect
angu
lar
hole
bel
ow th
e sw
itch.
11. (\)/Fi
g. 4
. Con
nect
a 2
" pi
eceo
fgre
ywir
efro
mS2
B-4
(C)t
oR22
-4(S
l).
12. (
) Fig. 4. Connect a 3 1/2" piece of yellow wire from S2B-
7 (S
1)
toR
23- 3
(S
1).
13. (
\) f
ig. 4
. Con
nect
a 3
" pi
ece
of y
ello
w w
ire fr
om R
23- 2(Sl)to R25-1 (Sl).
14. (
J),F
ig.
4. C
onne
ct a
3"
piec
e of
gre
y w
iref
rom
R22
- 5(Sl) to R24-4
(Sl).
15. (
\/) F
ig. 4
. Con
nect
one
end
of
a 17
" pi
ece
of y
ello
w w
ire
to X
I1- 1
(S
1)and one end of a 16" piece of brown wire to XI1-2
(S 1
). T
wis
t the
two
lead
stogether. Run along the front of the chassis and under the cable cl
amp,
as
shown. Push'
unso
lder
ed e
nd th
roug
h ho
le "
V"
to th
e bo
ttom
of
the
chas
sis.
16. (
~. 4
. Connect a l"
piec
e of
bare
wire
from
R33
- 7(Sl) toR32-
S (
C).
17. (0 Fi
g. 4
. Con
nect
one
end
of
a 4
1/2"
pie
ce o
f bl
ack
wir
e to
R32
-S (S2).
Pus
h th
e pther end through hole "
Uti
lS. (
0Fig
.4.
Con
nect
a 2
" pi
ece
of g
rey
wire
from
S2B
- 10
(S 1
) to
S2B
- 4(S
2).
...
R33 PC
l
R32
TB
16
Fig. 5
Tw
o pr
inte
d ci
rcui
t pla
tes
are
sold
ered
to th
e du
al p
oten
tiom
eter
s. O
ne p
rinte
dci
rcui
t pla
te, P
C 1 gets co
nnec
ted
to th
e po
tent
iom
eter
s, R
31 a
nd R
33 n
eare
stth
e fr
ont a
pron
. The other printed circuit plate, P
e2 g
ets
conn
ecte
d to
the
potentiometers R30 and R32 mounted on the rear of the front potentiometers.
To
keep
the
draw
ings
cle
ar a
nd s
impl
e, th
e fir
st p
late
, PC
1 is
mou
nted
and
wir
ed in
fir
st, w
ith th
e as
soci
ated
con
nect
ions
. The
rea
r po
tent
iom
eter
issh
own
dotte
d in
.B
elow
this
dra
win
g, th
e se
cond
pla
te, P
C2
is m
ount
ed a
nd w
ired
in th
e ci
rcui
tw
ith it
s as
soci
ated
con
nect
ions
. In
this
dra
win
g, th
e front potentiometer
, R31
is shown dotted in. All th
e co
nnec
tions
mad
e pr
evio
usly
for PC 1 are not sh
own
in th
is d
raw
ing
to a
void
con
fusi
on.
We
now
wir
e th
e ci
rcui
t usi
ng th
e fir
st p
rinte
d pl
ate,
PC
l, us
ing
the
uppe
rdr
awin
g.
1. (
Fig. 5. S
trip
the
oute
r in
sula
tion
back
1/2
" on
one
end
of a
811
piec
e of
sin
gle
cond
ucto
r sh
ield
ed c
able
. Tw
ist t
he s
hiel
d st
rand
s to
geth
er a
ndcut off. Strip the inner insulation ba
ck 1
/4" ,
Connect this end to R33-4
(C).
... O
n th
e ot
her
end
of th
e sa
me
piec
e of
cab
le, s
trip
the
oute
r in
sula
tion
back
... 3
/4" .
Tw
ist t
he s
hiel
d st
rand
s to
geth
er. S
trip
the
inne
r in
sula
tion
back
1/4
"Pu
sh th
is e
nd o
f th
e ca
ble
thro
ugh
hole
"T" to the bottom of the ch
assi
s.
2. (
\J Fi
g. 5. C
onne
ct o
ne e
nd o
f a
711 piece of brown wire to R33-
6 (C
).Push the other end through ho I e
liT
II .
6. (IA Fig. 5. Connect on
e en
d of
a 1
0" p
iece
of
grey
wir
e to
the
swi~
chS4
-9 (S l)
whi
ch is
mou
nted
on
the
rear
of
the
dual
treb
le c
ontr
ol p
oten
tiom
eter
s.C
onne
ct o
ne e
nd o
f a
14"
piec
e of
bla
ck w
ire
to S
4-10 (S 1). T
wis
t the
two
lead
s to
geth
er a
nd p
ush
the
unso
lder
ed e
nd th
roug
h ho
le "V" to the bottom of
the chassis.
3. (
v) Fig. 5. O
n th
e pr
inte
d ci
rcui
t pla
te)'
Pel
, cut leads
112
#3 a
nd #
6to 1/2"
. Cut leads
111
#5 a
nd #
7 to
2".
Cut
dead
#4
to 1
1/2
". Connect lead
*6 to R31-3
(C),
lead
#3
to R
31-2 (C) and lead #2 to R31-
1 (S
1). C
over
lead
s#1 and #7 each with a 1
3/4"
pi
ece
of s
pagh
etti.
Con
nect
lead
#1
to R
33-6
(S2
)and lead
117
to R33-4 (S2). Cover lead #4 w
ith a
1 1
/4"
piec
e of
spa
ghet
tiand connect to R33-5 (Sl). Cover lead #5 with a 1
3/4"
pi
ece
of s
pagh
etti
and conflect to TB 16-
1 (C
).
4. (Ii Fig. 5. Cut both leads on a . 0
012m
fd (
1. 2
K o
r 12
00m
mf)
dis
c ca
paci
-tor, C19)' to 1/211. Connect from R31-
2 (S
2) to
R31
-3 (S2).
The
wiri
ng o
f the
fron
t pot
entio
met
ers
and
the
prin
ted
circuit plate Pe 1, has
now been completed. R
efer
ring
to th
e se
t bel
ow th
e m
ain
draw
ing,
wire
the
rear
sec
tjon
of th
e du
al c
once
ntri
c po
tent
iom
eter
, with
the
prin
ted
circ
uit
plate, !1t2, as follows:
7.
Fig. 5. Cut the leads #2
#3 and
116
on p
rint
ed c
ircu
it pl
ate
PC2,
to1/
2". On the same printed circuit plate Pe2, cut leads
111
and
#7 to
2 1
/4"
lead
#5
to 1
1/4
" an
d le
ad #
4 to
1 3
/4". Connect lead #6 to R30-3 (C), lead
#3 to
R30
-2 (
C)
and
lead
#2
to R
30-1
(S 1). C
over
lead
s #1 and #7 each with
a 2"
pie
ce o
f spa
ghet
ti. C
onne
ct le
ad#7
toR
32-1
(C)and lead #lto R32-
3(C
).C
over
lead
#4
with
a 1
1/2
" pi
ece
of s
pagh
etti
and connect to R32-2
(Sl).
Cov
er Ijbd #5 with a 1" piece of spaghetti and connect to TB 16-2 (S2).
8. ('YFig. 5. Cut both leads on a
. 001
2mfd
(1.
2K
or
1200
mm
f) d
isc
capa
ci-
tor,
C20
, to
1/2"
. Connect from R30-
3 (S
2) to
R30
-2 (S2).
9. (v) Fig. 5. C
onne
ct o
ne e
nd o
f an
8"
piec
e of
gre
y w
ire
to TB 16-
1 (S
2).
Push
the/
othe
r en
d th
roug
h ho
le "
T"
to th
e bo
ttom
of
the
chas
sis.
10. (0 lig. 5. Connect one end of a 4" pieceof yellow wire to R32-3 (S2).
Push
th1o
ther
end
thro
ugh
hole
"U
" to
the
botto
m o
f th
e ch
assi
s.
11. (
.1)-
Fig
. 5. S
trip
the
oute
r in
sula
tion
back
1/2
" on one end of a 5"
piec
e of
sin
gle
cond
ucto
r sh
ield
ed c
able
. Tw
ist t
he s
hiel
d st
rand
s to
geth
er a
ndcut off. Strip the inner insulation
back
1/
4"C
onne
ct th
is e
nd to
R32
-1 (S2).
On
the
othe
r en
d of
the
sam
e pi
ece
of c
able
, str
ip th
e ou
ter
insu
latio
n ba
ck3/
4". Twist the shield strands together. Strip the inner insulation ba
ck 1
/4-
Push this end of the cable th
roug
h ho
le "
U"
to th
e bo
ttom
of
the
chas
sis.
5. (
v) Fig. 5. C
onne
ct o
ne e
nd o
f a
5 1/
2" p
iece
of green wire to TB 16-
(C)
Push
the
othe
r en
d th
roug
h ho
le "
T"
to th
e bo
ttom
of
the
chas
sis.
R64
XV
7
XV
5
;:; TB 10
XV
ll
TB
6
XV
12
-$-
XI1
J 14
15 T
B4
XV
8T
B3
TB
20T
B2
TB
5X
V10
J89
10, I
J111
2. J .
TB
1J1
6T
B9
LC
D
Fig.
6
TB
7T
B8
XV
3T
B21
TB
llT
B19
TB
18
T B
'l5X
V4
XV
6
TB
13
XV
2
TB
17
XV
9 TB 14
C:3
7
XV
1
TB
12
BE
LOW
CH
AS
SIS
WIR
ING
I.
jy;g
,
6. F'om th
e po
we'
t,on
,ro,
mer
, n,
conn
ect o
ne g
'oon
leod
toR
64- l
(C) and the other green lead to R64-3
(C).
2.
Fig. 6. Fold the po
t gro
undi
ng lu
g ov
er te
rmin
al #
2 on
R64
. Sol
der
this
lug
to th
is te
rmin
al R
64- 2
(S1).
3. (
/Fi9
. 6. Connect on
e en
d of
a 4
" pi
ece
of y
ello
w w
ire to
R64
- 3 (C)
and one endofa 4"piece of brown wire to R64-1(C). Twist the wireslogether.
Con
nect
t~e
othe
r en
d of
the
yello
w w
ire to
XV
7-4
(C)
arid
the
othe
r en
d of
the
broW
j/wir
e to
XV
7-5
(C).
4. ,
('-/ F
ig. 6
. C
onne
ct o
ne e
nd o
f a
5" p
iece
of
yello
w w
ire
to R
64~
(S3)
and
one
end
of a
5"
piec
e of
brown wire to R64-l (S3). Twist the wires to-
geth
er. C
onne
ct th
e ot
her
end
of th
e ye
llow
wire
to X
VS
- 4 (C) and the other
end
of th
e br
own
wire
to X
VS
-5 (
C).
and
one
end
of a
5"
piec
e of
bro
wn
wir
e to
XV
I0- 5
(S2). Twist the wires and
run
alon
g th
e ch
assI
s as
sho
wn.
Con
nect
the
othe
r en
d of
the
yello
w w
ire to
XV
9-4
(C)
and
the
othe
r en
d of
the
brow
n w
ire to
XV
9-5
(C).
12. (
\.....
Fig
. 6. C
onne
!=t o
ne e
nd o
f a 4
" pi
ece
of y
ello
w w
ire to
XV
9-4 (C)
and
one
end
of a
5"
piec
e of
bro
wn
wir
e to
XV
9-5(C). Twist the wires and run
alon
g th
e ch
assi
s as
sho
wn.
Con
nect
the
othe
r en
d of
the
yello
w w
ire
to X
V6-
4(C
)and the
ojhe
r en
d of
the
brow
n w
ire
to X
V6-
9 (C
).
13. (/
Fig. 6. Connect one end of a 7" piece of
yel
low
wire
to X
V9-
4 (S3)
and
one
end
of a
7"
piec
e of
bro
wn
wire
to X
V9-
5 (S3). Twist the wires and
run
alon
g t~
e ch
assi
s as
sho
wn.
Con
nect
the
othe
r en
d of
the
yello
w w
ire to
XV
2-4
(YJ
and
the
othe
r en
d of
the
brow
n w
ire
to X
V2-
9 (S
1).
" i
/ /
14. (
)) J
ig. 6
. Con
nect
a 1
/2"
piec
e of
bar
e w
ire fr
om X
V2-
4 (S
2) to
XV
2-5 (Sl).
15. (
0 F
ig. 6
Con
nect
a 1
/211
pie
ce o
f bar
e w
ire fr
om X
V6-
4(S2
) to
XV
6-5(
C).
16. UJ Fig. 6 C
onne
ct o
ne e
nd o
f a 4
1/2
" pi
ece
of b
row
n w
ire
to X
V6-
9 (S2)
and
one
end
of a
3"
piec
e of
yel
low
wir
e to
XV
6-5 (S2). Twist th
e w
ires
and
run along the ch
assi
s as
sho
wn.
Con
nect
the
oth~
r en
d of
the
yello
w w
ire
toX
V4-
4 (C
) an
d th
e ot
her
end
of th
e br
own
wire
toX
V4-
9(C
).
17. (~9
.6. C
onne
ct o
ne e
nd o
f a 2
1/2
" pi
ece
of y
ello
w w
ire to
XV
4-4 (C)
and one end of a 5 1/2" piece of br
own
wire
to X
V4-
9 (S2). Twist the wires
and
run
alon
g th
e ch
assi
s as
sho
wn.
Con
nect
the
othe
r en
d of
the
brow
n w
ireto
XV
l-9
(S 1
) an
d th
e ot
her
end
of th
e ye
Ilo
w w
i re
to X
Vl-4 (C)
lS. (
\)iF
ig. 6
Con
nect
a 1
/211
pie
ce o
f ba
re w
ire
from
XV
l-4
(S2)
to X
Vl-
5(S
1).
(~/i9
' 6.
Con
nect
a 1
/2"
piec
e of
bar
e w
ire fr
om X
V4
-;- 4
(S3)
to X
V4-
5(Sl
).
20. (
'1)
Fig.
6. C
onne
ct o
ne e
nd o
f on
e 3
1/2"
pie
ce o
f ye
llow
wire
to X
V12
4 (C
) an
d on
e en
d of
a s
econ
d 3
1/2"
pie
ce o
f yel
low
wire
to X
V12
- 5 (
Sl).
Tw
ist t
he w
ires
and
run
alon
g th
e ch
assi
s as
sho
wn.
Con
nect
the
othe
r en
d of
one
of th
e ye
llow
wir
es to
XV
l1- 4
(C
) an
d th
e ot
her
end
of th
e re
mai
ning
yel
low
wire
to X
V11
- 5 (C
).
21. (
\~ Fig. 6. From the power transformer, Tl, tw
ist t
he y
ello
w le
ads
and
run
alon
g th
e ch
assi
s as
sho
wn.
Con
nect
one
lead
to X
V11
- 4 (
S2)
and
the
othe
rle
ad to
XV
11- 5 (S2).
5. (\
!) Fig.. 6
. Con
nect
one
end
of
a 4
1/2"
pie
ce o
f br
own
wir
e to
XV
7-...
. (S
2) ~
nd o
ne e
nd o
f a 3
1: p
iece
of y
ello
w w
ire to
XV
7-4 (S2). Twist the leads
toge
ther
. ,C
onne
ct th
e ot
her
end
of th
e ye
llow
wir
e to
XV
5-4
(C)
and
the
othe
rend of the brown wire (r
unni
ng a
long
the
chas
sis
as s
how
n) to
XV
5-9
(C).
6.
~I
Fig. 6. Run the twisted pair of br
own
and
yello
w w
ires
fro
m h
ole
"along the ch
assi
s as
sho
wn.
Con
nect
the
brow
n le
ad to
XV
5-9
(C)
and
the
yello
w le
pd to
XV
5-4
(C).
7. ( ~itg. 6. Connect a 1/2" pi
ece
of b
are
wire
from
XV
5-4
(S3)
to X
V5-
5 (C
).
S. (
\)!
Fig.
6. C
onne
ct o
ne e
nd o
f a
4" p
iece
of
yello
w w
ire to
XV
5-5 (S2)
and
one
end
of a
5 1
/2"
piec
e of
bro
wn
wire
to X
V5-
9 (S3). Twist the two
wir
es a
nd r
un a
long
the
chas
sis
as s
how
n. C
onne
ct th
e ot
her
end
of th
e ye
llow
wir
e to
iX~3
- 4(C
) an
d th
e ot
her
end
of th
e br
own
wire
to X
V3-
9 (S1).
9. (iF
f,. 6
. Con
nect
0 1
/2"
p; e
c. 01 b"'e w; ,. "o
m X
V3-
4 (5
2) to
XV
3-5
(5 I
),
10. (1 Fig. 6. Connect one end of a
6" p
iece
of b
row
n w
ire to
XV
S- 5 (S2)
and
one
end
of a
6"
piec
e of
yel
low
wir
e to
XV
S-4 (S2). Twist the wires and
run
alon
g th
e ch
assi
s as
sho
wn.
,Con
nect
the
othe
r en
d of
the
brow
n w
ire
toX
VI0
- 9 (
C)
and
the
othe
r en
d of
the
yello
w w
ire
to X
VI0
-4 (
C).
11.
J)
Fig. 6. Connect"
one
end
of a
5"
piec
e of
yel
low
wi ~
e to
XV
lO-4
(S2
)
-$-
XV
1O
R62
Jl6
TB
5
XV
7
XV
9
TB
18
XV
3
TB
8
C38
XV
ll
-$-
Fig.
7
1.
Fig. 7. F
rom
the
pow
er tr
ansf
orm
er, Tl, connect the red-yellow and
whi
te I
"ads
to g
roun
d lu
g "A
" (C
) at
the
pow
er tr
ansf
orm
er.
2.
(IJ)
Fig. 7. From the power transformer, Tl, twist the two red leads and
run
alon
g th
e ch
assi
s as
sho
wn.
Con
nect
one
red
lead
to X
V12
- 7 (
C)
and
the
other red
lead
to X
Vll-
7 (C
).
3. (
' -(F
ig. 7
. Con
nect
01"
pie
ceof
bare
wir
efro
mX
Vl1
- 1 (
Sl)t
oXV
11- 7
(S2)
.
4. (
" ) F
ig. 7
. Con
nect
a 1
"pi
ece
of b
are
wir
e fr
omX
Vl2
- 1 (
Sl)t
oXV
12- 7
(S2)
5.
(,i
F,g. 7. Run the tw
iste
d pa
ir o
f gr
ey a
nd b
lack
lead
s fr
om h
ole
"al
ong
the
chas
sis
as s
how
n. C
onne
ct th
e gr
ey le
ad to
XFl
- l (C) and the black
lead to J16-:-
1 (C
).
6 (
Fig. 7. C
ut b
oth
lead
s on
a .
03m
fd m
olde
d ca
paci
tor , C40, to
and coverE!och with a
3/4"
pi
ece
of s
pagh
etti.
Con
nect
one
lead
to X
F1-
1 (S
2)and the other lead to ground lug "A" (S3). Be careful not to burn the leads
runn
ing
near
gro
und
lug
"
7. (
Fig.
7. .
From the power transformer Tl, connect th
e bl
ack
lead
(ne
ar-
est g
roun
d lu
g "
) to
J16
- 2 (
C).
V)
Con
nett
rem
aini
ng b
lack
lead
on
pow
er transformer, Tl, to
XF1
-(S
1)
.
9. (
,/) Fig. 7. C
onne
ct th
e 35
0Q, 1
0 w
att r
esis
tor , R63, from TB6-
1 (C
)to TB6-2
(C).
Cut
bot
h le
ads
to ,
1 1/
4" a
nd c
over
'eac
h w
ith a
1'1
pie
ce
spag
hetti
.10. (V) Fig. 7. Cut both leads on the 30
mfd
ele
ctro
lytic
cap
acito
r, C
38, t
o1
1/2"
. Cov
er th
e po
sitI
ve (
+)
lead
with
1 1
/4"
plec
e of
spa
ghet
ti an
d co
nnec
tto
TB
6-2 (C). Connect the negative lead to ground lug
" B
" (S
1)
on X
V12
.
11. (d Fig. 7. C
onne
ct a
1/2
" pi
ece
of b
are
wire
from
XV
12- 3 (C) to
XV
12-4
(C
).
12. (,0 Fig. 7. C
onne
ct a
3"
piec
e of
red
wire
from
XV
12- 4
(S
3) to
TB
6-1
(C).
13. (
'\./Fig. 7. Cut the po
sitiv
e (+
) le
ad o
n th
e 30
mfd
ele
ctro
lytic
cap
acito
rC
39, t
o 1 1/2"
. Cov
er w
ith a
1 1
/4"
piec
e of
spa
ghet
ti an
d co
nnec
tto X
V12
-3 (S2). The other lead w
ill b
e co
nnec
ted
late
r.
14. (\hi
9' 7
. Con
nect
a 6
" pi
ece
of o
rang
e w
ire fr
om T
B6-
2 (S
3) to
XV
7-9(
C).
15. (
trFi
g. 7
. Con
nect
a 3
/4"
piec
e of
bar
e w
ire fr
om T
B6-
1 (C
) to
XV
11- 3
(S
1).
16. (
w)
Fig.
7. C
onne
ct a
7"
piec
e of
ora
nge
wir
e fr
om X
V7-
9 (S
2) to
XV
9-9
(C).
17. (
\, YFig. 7. Connect a 6" pi
ece
of o
rang
e w
ire
from
XV
a-9
(Sl)
to T
B5-
1 (C
).
18. (
\.J F
ig. 7
. Con
nect
a 3
" pi
ece
of o
rang
e w
ire f
rom
XV
I0- 9
(C)
to X
V9-
9(S2
).
19. (
yYFi
g. 7
. Con
nect
a 1
" pi
eceo
f ba
re w
ire
from
TB
5-1
(C)
to X
VlO
- 9 (S2).
20. (
1/1 Fig. 7. ConneCt a 4 1/2" piece of orange wire from TB5-2 (C) to
TB 18-2
(C).
21. (
~i9
7. Cut both le
ads
on a
4. 7
KQ
(ye
llow
, vio
let ,
red
, silv
er)
2 w
att
resi
stor, R62, to
3/4"
Connect from TB5-
1 (S
3) to
TB
5-2 (S2).
22. ~
/) Fi
g. 7.
XV
7-3
(C).
23. (
\)lF
ig.
to X
V9
3 (C
).
Con
nect
a 3
1/2
" pi
ece
of y
ello
w w
ire f
rom
XV
8-3
(C)
to
Con
nect
a 3
1/2
" pi
ece
of y
ello
w w
ire
from
XV
10- 3
(C)
24. r) Fi
g. 7
. Con
nect
an
81/2
" pi
ece
of r
ed w
ire fr
om T
B5-
3 (C
) to
TB
6-1
(S4)
.
25. (
.... )'
Fig
. 7.
Con
nect
the
blac
k w
ire fr
om h
ole
" U" to TB7-
1 (C
).
26. (
;) ,Fig. 7. Connect th
e gr
een
wire
from
hol
e li T
" to XV3-2 (S 1)
.
27. (
vi/F
ig. 7
. Connect the ye
llow
wire
from
hol
e " U
" to TB8-
1 (C
).
28.
(V)
Fig
. 7. C
onne
ct a
3 1
/2"
piec
e of
bla
ck w
ire fr
om T
B7-
1 (C
) to
TB
8-2
(C).
29. (\J Fig. 7. Connect the ou
ter
shie
ld f
rom
the
sing
le c
ondu
ctor
shi
elde
dca
ble
(fro
m h
ole
")
to T
B7-
1 (C
) an
d th
e in
ner
cond
ucto
r of
the
som
e ca
ble
to T
B7-
2 JC
).
30.
('0.1
Fig. 7. S
trip
bac
k th
e ou
ter
insu
latio
n 3/
4" fr
om o
ne e
nd o
f a 8
"piece of single conductor shielded cable. T
wis
t the
shi
eld
stra
nds
toge
ther
.St
rip
the
insu
latio
n on
the
inne
r co
nduc
tor
back
1/4
" . Connect the shield to
TB
7-1
(C)
and
the
inne
r co
nduC
tor
to T
B7-
2 (C). On the other end of the same
cabl
e, s
trip
the
oute
r in
sula
tion
back
1/2
" . Twist the shield strands together.
Stri
p th
e in
sula
tion
on th
e in
ner
cond
ucto
r ba
ck 1
/4"
Con
nect
the
shie
ld to
J14, 15-
1 (S
l) an
d th
e in
ner
cond
ucto
r to
J14
, 15-
2 (S
l).
-$-
J 14
1 5
TB
1
TB
2
XV
10
C29 R57
C30
XV
7
R56
XV
9
TB
19
TB
18
C37
XV
4T
B21
B15
TB
8
R25
-$-
Fig. 8
1.
(d)
Fig.
8. C
ut th
e ne
gativ
e (-
) le
ad o
n th
e 30
mfd
ele
ctro
lytic
cap
acito
r,C39, tol 1/4". Connect to TBI0-
1 (C
).
2. ,,) Fig. 8. From the output transformer, T2, connect the yellow lead to
TB
l-4 (C), the green lead to TB1-3
(S1)
, the
bro
wn
lead
to T
Bl-2 (Sl), the
black lead to TB 1-1
(C),
the
red
lead
to T
B5-
3 (C
), th
e bl
ue le
ad to
XV
7-7
(S H
,the bro
ym- y
ello
w le
ad to
XV
8-7
(Sl)
, and
the
oran
ge le
ad to
TB
l-5
(Sl)
.
3. (V) Fig. 8. Connect a 3 1/2" piece of gr
een
wire
from
XV
7-6
(C)
toX
V8-
6 (C
).
piece of single conductor shielded ca
ble~
Tw
ist t
he shield strands together.
Stri
p th
e in
sula
tion
on th
e in
ner
cond
ucto
r ba
ck 1
/4". Connect the shield to
TB
21- 1
(C
) an
d th
e in
ner
cond
ucto
r to
TB21-2 (C). On the ot
her
end
of th
esa
me
cabl
e, s
trip
the
oute
r in
sula
tion
back
1/2
" . Twist the shield strands to-
geth
er. S
trip
the
insu
latio
n on
the
inne
r conductor back 1/4". Connect the
shie
ld to
J14
, 15-
4 (5
1) a
nd th
e in
ner
cond
ucto
r to
J14
, 15-
3 (S
l).
4.
U)
Fig. 8. Connect a 3 1/2" piece of gr
een
wire
from
XV
I 0- 8
(C) to
T8
19-1
(C
).
5. .
Fig. 8. Cut al
l lea
ds o
n tw
o 50
mfd, 25V, electrolytic capacitors,
C29
, and
C30
, to
1". Cover the po
sitiv
e (+
) le
ads
on b
oth
capa
cito
rs w
ith a
3/4"
pi
ece
of s
pagh
etti.
Con
nect
the
posi
tive
lead
of o
ne c
apac
itor
toX
V10
-(S2) and the negative (-) lead to ground lug "C
" (S
l) a
t XV
9. C
onne
ct th
epo
sitiv
e (+
) le
ad o
f the
sec
ond
capa
cito
r to
XV
8-3
(52)
and
the
nega
tive
(-)
lead
to g
roun
d lu
g " D
" (S
l) at
XV
7.
;::; 6
. (\.
Fig. 8. C
ut b
oth
leads on a
1650
, 5
wat
t res
isto
r )' R
56, t
o 3/
4"C
over
one
lead
with
a 1
/2"
piec
e of
spa
ghet
ti an
d co
nnec
t XV
9-3
(S2)
. Con
-ne
ct th
e ot
her
lead
to g
roun
d lu
g " E
" (S
l) a
t XV
I0. D
ress
res
isto
r aw
ay f
rom
surr
ound
ing
wir
es.
7.
Fig. 8. From the output tr
ansf
orm
er, T
3, c
onne
ct th
e ye
llow
lead
toT
B2-
4 (C
)r
the green lead to TB2-3
(S 1
), th
e br
own
lead
to T
B2-
2 (S 1), the
blac
k le
ad to
TB
2-1 (C), the red lead to TB5-3
(S3)
, the
blu
e le
ad to
XV
9-(S
l), t~
e br
own-
yello
w le
ad to
XV
10- 7(Sl)and the orange lead to TB2-5 (S1).
I /8.
(~
f Fi
g.S. Connect the br
own
lead
from
hol
e " T
" to
TB
11- 2
(C
).
9. (
J) F
i ./;. Connect" 2 1/2" piece "Iced wi'e from TB9-3
(C)
to T
B 1
1-1
(C).
10.
(\1
Fig. 8. C
onne
ct th
e ou
ter
shie
ld fr
om th
e si
ngle
con
duct
or c
able
(fro
m h
ole
li)
to T
B21
- 1(C) and the inner conductor to TB21-2 (C).
13. (
le) Fig. 8. Cut one lead on
the
1650
, 5
wat
t res
isto
r, R
57, t
o 1
1/2"
and cover with a 1 1/4" piece of spaghetti. C
onne
ct th
is le
ad to
XV
7-3 (S2).
Cut
the
ot~e
r le
ad to
1/2
" an
d co
nnec
t to ground lug R
(Sl)
. Dre
ss a
way
from
the surrou,nding wires.
14.
("~t
Fig. 8. Connect a 3 1/2" piece of black wire from TB8-2 (C) to
TB
21-1
(C).
15. (
, /)
Fig.
8. C
onne
ct a
3"
iece
ofbl
ackw
iref
rom
TB
21- 1
(C
)toT
Bl1
- 3(C
).
16.
Fig. 8. Connect a 3 1/2" piece of black wire from TBll-
3 (C
) to
grou
nd lu
g n
G"
(C).
17. (
\i)/F
ig. 8
. Con
nect
the
grey
lead
from
hol
e " T
" to
XV
4-2
(Sl).
18.
F)g.
8. C
onne
cta
4"pi
ece
of o
rang
e w
irefr
omT
B10
- 2(C
)toT
B9-
2(C
).
/ /
19. ~
~fg. 8. Connect" 3 1/2" p;aca "hod whoa
froM
181
1-1
(C)lo
TB
I8-3
(C
).
20. (
'vi F
ig. 8
. Con
nect
a 4 1/211 pi
ece
of r
ed w
ire fr
om T
B18
- 3(C
) to
C37
-B (
C).
21. (
) F
ig. 8
. Con
nect
a 3
" pi
ece
of r
ed w
ire fr
omT
B18
- 3 (
C)
to T
B15
- 1 (
C).
22. (
"'r Fig. 8. Connect a 3 1/2" piece of orange wire from TB18-2 (C) to
C37
-A (
0).
23.
Fig. 8. Connect a 1" piece of bare wire to the dual concentric pots
in th
e re
ctan
gula
r ho
le a
t the
mid
dle-
fron
t of
the
chas
sis.
Con
nect
from
R24
-(Sl) to R25::-3
(C).
12. (~ Fig. 8. S
trip
bac
k th
e ou
ter
insu
latio
n 3/
4" fr
om o
ne e
nd o
f an
8"
24. (
\J f
ig. 8
. Con
nect
a 2
" pi
ece
of b
lack
wire
from
R25
- 3(S
2) to
TB
11- 3
(C
).\l/
25. (
\J)
Fig
. 8. C
onnect a 1 3/4" piece of green wire from R25-2
(51)
toX
V3-
7 (S
1).
11.
(J)
Fig. 8. Connect a 3 1/2" piece of orange wire from TB9-2 (C)
TB
18-2
(C
).
R59
(31
R55
R48
R53 R51
R49
(25
(33
(35
R45
C27
R47
R43
C23 R41
R39 (21
C17
TB
4 TBl TB20
TB
3 T
B2
~\ (
(I)
~I -,
~~:
~~
Lj1
rdIi
f~t"
'
j.. ,)
~
~:i
~ ~
Hi'
~'E
!10
-n-
~~~
, 4-
\.
'Ut
'" ~
:~..:~
~
"-\'J--. r
",.
:k~ I
~ o-
ff:~'
""=
,~~
. ~"1
- ,
!:51$
I
, -
"'~ ~ ~"
,'~
€)
' - '
,,1-
c~ 0
"';'
~~
~ 0
"dJ:
;!L
. ~U
,p'rr
~
~,L
\.
,- W
l'-' ~
R
. ~~
. c-"
"e--
- (9FJ 2
'" l1
'\~
,\1
----
----
~
II ,I
~) ~
...
" ,
~~,; ~~C
~ .~
'~ij 1'.
' ~ ~ ~
~:::
- ~
i.l:5"
""""
"
, ~ ~
-
:H:;~ _
i-
fi' ~I
'"i
t".-
. --:\ \
...)-
l"r'
7. -, o-
~~c~
~ ~ ~
~ (
!. "
'/'
?J",
~~. ,
",
--'c
...".
.
S ~
.~ W
""Y
,' ~
-V
..,
- -
t!
r-
: ~
Io -c
.
.~.
Q:
d2;
IIJ/
i) I!
iJI!
J.
.., ' -1
:: "!
'O0\
"'i!t
1,./
; ~ z~
~~~-
..
/h
,gJ(
g -~
~ '~.
,-
~
~ -
~ -
.-,,:
.....;
;.
~r'~"
u 12
' I ~
~)
..
~dO
l rtO
1 p=
i\O
\ 110
\ nO
! S
~?'
'Ii -"".
. ~"'
" ""
. ..
~, #-
-- 1W
l!'
r---
.I~ ~
,.0
-I'
~\:y
"t\ ~
'
~;J
""-~
t---
. I-
!t' ~
v.,"
'1Y
:'~/'\
~)
I.~L;
7."
""""
"" '
~;
~O
!!'"
~-
~ ~
,":,\
l---
~ ~
-~:,r
?;
i~ts
:~i1
);
\;J~,
'~J~
i- "
:w~u
;r:-
-i
H~
' '~~!
\"
f 0 '" '
-'tot., ",:""",
0 ~
---
0 ~o
~ ~-
' "
,,,' ~
~~
"~
,",
' ~~
. -'\
('/(
Y\
. . '
) J
'
. """
~)
~~.
C 1
----
-
-I-
/j,
~---
AJ/
i) 1!i
J/fi
J
, ~ ~
"'--
: ...
..
v:'
(1?r
f~~
~~
i" )
"" """ / ~
~' I-
---.
k
\ ~ '
......
. ~ ~
~ --
-- l!
f\!H
J
~~
----
.U
w b
----
(L ~
~'
(( '"
Y ~
\'\.\..
'
~I
g=
Fig.
9
-$-
R58 (32
R54
R52
R50
C34
R46
C28 (36
R40
C26 (24
E38 r44
R42 (22
(18
R24
1. (
\)Fi
g.9.
Con
nect
a21/
2"pi
eceo
fgre
enw
iref
rom
R24
- 5(S
l)to
XV
4-7(
Sl).
2. (
1) /Fig. 9. C
onne
ct a
9"
piec
e of
bla
ck w
ire fr
om X
V5-
8 (C
) to
T84
(C
).
3. ( ) Fig. 9.
Con
nect
a 9
" pi
ece
of b
lack
wire
from
XV
6-8
(C)
to T
B3-
1 (C).
4.
(viF
ig. 9. Cut all leads on two 47mmf, 10% di
sc c
apac
itors
, C31
and
C32
, to
3/4"
. Connect C32 from TB2-4
(C)
to T
B3-
1 (C
) an
d th
e ot
her
capa
ci-
tot, C31,
from 1Bl-4 (C) to 184 (C). Each lead is to be covered with a 1/
2"pi
ece
of s
pagh
etti.
5. h
)Fig
. 9. C
onne
ct a
1"
piec
e of
bar
e w
ire
from
TB
l-l (
S2)
to T
B3-
2 (S1).
6. (
) /
Fig
. 9. C
onnect a I" piece of bare wire frQm TB2-
1 (S
2) to
gro
und
lug
IIH;' (Sl).
7. (
\/,
Fi.g
. 9. C
ut a
ll le
ads
on th
e tw
o 22
KO
(re
d, r
ed, o
rang
e, g
old)
5%
resi
stor
s, R
58 a
nd R
59, t
o 3/
4". Connect R58 fr
om T
B2-
4 (S
3) to
TB
3-1 (S3)
and
R59
from
1B
1- 4
(S3
) to
184
(S3
). E
ach
lead
is to
be
cove
red
with
a 1
/2"
piec
e qf
spa
ghet
ti.8.
(\;1
Fig
. 9. C
ut all le
ads.
on
the
six
10K
Q (
brow
n, b
lack
, ora
nge,
silv
er)
... res istors, R40, R41,R52; R53, R54, and R55, to 1/2". Connect R55 from X
V8-
6-0 (S.2)
to X
V8-
2(Sl). Conne~t R53 re
sist
or f
rom
XV
7-8(
C)t
oXV
7-2
(Sl)
. Con
-ne
ct R
54 fr
om X
V10
- 8 (S2) to XV1Q;..2 (S 1) C
onne
ct R
52 fr
om X
V9-
8 (C
) to
XV
9-2 (S 1). Connect R41 from TB9-
1 (C
) to
1B
9-2 (C). Connect R40 from
TB
18- 1
(C
) to
TB
18- 2
(C
).
9. ~./) ~ig. 9..
Con
nect
a 3
" pi
ece
of g
rey
wire
from
TB
20- 2
(C
) to
XV
9-8 (S2).
10; (
fI) F
ig. 9
. Cut
all
lead
s on
the
two
330K
O (
oran
ge, o
rang
e, y
ello
w, s
ilver
)re
sist
ors,
R48
and
R50 to 1/2". Connect R50 from TB 19-2 (C) to TB 19-
1 (C
).Connect R~8 from TB20-
1 (C
) to
TB
20- 2
(C
).
11. (t)lFig. 9. Cutall leads on the two 330KO(orange,
oran
ge, y
ello
w; s
ilver
)re
sist
ors,
R49
and
R51 to 3/4". Connect R49 from TB 10-
1 (C
) to
XV
7-8
(C).
Con
nect
R51
from
XV
7-6
(C)
to g
roun
d lu
g"
I" (
C).
12. (
\;Fig. 9. C
ut a
ll le
ads
on th
e fo
ur. 0
25m
fd (
25K
or
25, O
OO
mm
f) d
isc
capa
cito
rs, C
33, C
34, C
35, a
nd C
36, t
o 3/
4". Connect C33
from
XV
5-1
(C)
to X
V7-8 (S3). Connect C35 from XV5-3
(C)
to X
V7-6 (S3). Connect C
34fr
om X
Y6-
1 (C
) to
TB
20- 2 (S3). Connect C
36 f
rom
XV
6-3(
C)
to T
B19
-1 (
S3).
13.
Fig 9. Cut al
l lea
ds o
n th
e tw
o 10
0KO
(br
own,
bla
ck, y
ello
w)'
gold
)
5% r
esis
tors
, R45 and R46, to 1/2". Connect
R45
fro
m X
V5-
1 (C
) to
TB
I0-
(S2)
. Con
nect
R46
from
XV
6-3
(C)
toT
B19
- 2 (
C).
14. (
Fig
. 9. C
ut a
ll le
ads
on th
e tw
o 10
0KO
(br
own,
bla
ck, y
ello
w, g
old)
5% r
esis
tors
, R44 and R47" to 3/4". Connect R47 from XV5-
3 (C
) to
gro
und
lug
" 1" (C). C
onne
ct R
44 fr
om X
V6-
1(C) to TB9-2
(C).
15.
,or)
Fig. 9. Cut all leads on th
e tw
o 22
5mm
f di
sc c
apac
itors
, C25
and
C28
to 3
/4" .
Connect C25 fr
om X
V5-
1 (S
3) to
TB
I0- l
(S3
). C
onne
ct C
28fr
om X
V6-
3 (S3) to TB 19-2 (S3).
16. (
\#) Fig. 9. Cut all leads on the tw
o 22
5mm
f dis
c ca
paci
tors
, C26
and
C27
, to 1". Connect C
27 f
rom
XV
5-3
(S3)
to g
roun
d lu
g"
I" (
53).
Con
nect
C26
fro
m X
V6-
1 (53) to TB20- 1 (S2).
17. (
\')'j:
ig.
9. C
ut a
ll le
ads
on tw
o 1.
8K
O (
brow
n, g
rey,
red
, gol
d) 5
% r
esis
-to
rs, R
42 a
nd R
43, t
o 3/
4". C
onne
ct R
43 fr
omX
V5-
8(S
2) to
TB
7-1
(S5)
.C
on-
nect
R42
ifrom
XV
6-8
(S2)
to T
B21
- 1 (C).
18.
~j
Fig.
9. C
ut a
ll 'le
ads
on tw
o 47
0KO
(ye
llow
, vio
let,
yello
w, s
ilver
)re
sist
ors,
R38
and
R39
, to
3/4"
. Connect R39 from X
V5-
6(C
) to
TB
9-2 (S5).
Con
nect
R38
from
XV
6-6
(C)
to T
B18
- 2 (S5).
19. (
,,~ Fig. 9. Cut all leads on tw
o 15
0mm
f dis
c ca
paci
tors
, C23
and
C24
, .to 1". Connect C23 from XV5-
6 (C
) to
TB
9-1
(S2)
. Con
nect
C24
from
XV
6-(C) to TB 18-1 (S2).
20. ('
)'Fig
.9.
Con
nect
al1/
4"pi
eceo
fbar
ewir
efro
mT
B7-
2(C
)toS
5-1(
S1).
21. (\) Fig. 9.
Con
nect
a 3
/4"
piec
e of
bar
e w
ire f
rom
TB
21- 2
(C
) to
XV
6-7(
Sl).
22. (
,. 1 F
ig. 9
. Con
nect
a p
I pi
eceo
fbar
ewir
efro
mX
V5-
2 (S
l) to
XV
5-6 (S3).
23. ,("J Fig. 9. Cut a 1/
1 pi
ece
of b
are
wire
from
XV
6-2(
S1)
to X
V6-
6 (S3).
24. (\/~
i9' 9. Cut all leads on four. 1 mfd (brown, bl
ack,
yel
low
, yel
low
)m
olde
d ca
paci
tors
, C17
C18
, C21
and
C22
, to
3/4"
. Cover each lead with a
1/2" piece of spaghetti. Connect C
17 fr
om X
V3-
9 (C
) to
TB
8-1
(S2)
. Con
-ne
ctC
18 fr
om X
V4-
6(C) to TBl1-2(S2). Connect C21 fr
om X
V3-
1 (C
)to
TB
7-2
(S4)
. Con
nect
C22
from
XV
4-1
(C)
to T
B21
- 2 (C). Dress the leads as
show
n an
d pu
sh a
ll ca
paci
tors
flat against the chassis.
J~,1
0 R
~9 J
13 R
\((')
)
~~r ~
~ j.
-\.~~ ~
00:
~~~
f:jJ
:J~..
T B
1 3
~~ /'
~ .
~"
J/ia
T
B17
il;L
, ~
, \"
~'
-r;~
:'
: ,
it\~ "
. '6J
/ V
TB
9....
.......
1I1
1~ M
,'.,~
s:!
", I"
€) ~
. O
Ft.
~ .'
. -
C47
.....
~ ~
l"':'~"
\, '"
~
r.o'
~ I
~ I
- ,
;;;\'1
: !~~
t. .
III ...
I'(2
)t5
.....
R12
JjA
~ ~
I' ~
-- ~
':1:-
, = ~
..
~ -
t ,
TB
2
~(
~~
=-
1$
v:F
L" r
R37
,1:
'I"
~/ ~
rv'
), ~
-r/
~)
I'
~~\
~ ~~
~r,~
~~ ,. """
......
.
~~ ~ J~
.j ~
~~J
~ ~"
f.'
- !
~~-
R35
- i&L
"~-:
:'~ ~.
~ .
, "
\t
t~~
r::::
:=--
~ ~-
~i:
.... T
B14
XV4 gL~
.....
~
. 1,(9)
~~ ~ ~
;J~ ~
~~jtP
s.~
C48
~,
' ~ 1ICJ'
11 (~
\0\-
~ -
~ ~ c
"'7'
R
34
"'"
~~
'-.t.
~ - '.1
: I""
'" ~
~~ - ..
r ~
J ' \ ~Ar3
~' c
-,
' .
8 ~
fro)
j
"""
~~...
~,'.,
\.-.r
Y'\!
, rf
J,-
;';'f'
,. s:
!
,(~~
~~
rl
~o
R27
~. ~ C--!
,'
~"U
" ~ I ,
' \l..
....~/
~
L/
~~-;
v- V,
. '
jjI'( I
/./-"
I7/(
tJ'g
-r
, ,c (01. ~
1)(\
r:J
. . ~
')!~I
~ ~
"",
,,' ~
......
~ ' y
0 --
- ~
-.a.
,., ,
i. L I
.(.J
.J
'0 fi
0 t01
R29 R
IJ:~
($
i:'~
..;r'
~'
\ 1'-'
.t1
fjtj.
' 15.
0)
. "
. ~ .
.I
,~rh. :A(.
.4J.
. 0;
(~
~ ~
. 'n
R36
~ . ~
-J"
llil
'P I
~~ -
~ .
......
~ If
(~,z
~t~
JI ~
k.... -
~/\
S5
!en~
Ji0"
'J 7~l(
0 '~'
(
~: (OJ,
~jJ.
;
----
-1IO
1no1
T
B JS
l)
-.. /"
.-r
~:.:.
./
1/ '"
=
--~
---
-
C1
J,
.."",
..- """
-- ""
. ~ -
--
~ 1.
11
!-. --
-.. JX
V1
", ".
,\ j T
/I I'
J--
~\--
F'7.
~ l
~ ~
,n..
0 II
~oilM
Jol r-
--T B 8
A ,1
;j,) 4~
""'-
........" o'--
' .
- .
., ---
I~ OJ
TfOUI.." I
\IT
B
1 5
C 1
6
~ ~
~ --
--=
::::::
:::: '
""
/JJ ft ~
~ 11
~iD
.
~1f
\~ \'
R
28-
~:D
~~
-I. I
I R
26(f
J\I
T
B 1
2
Fig.
$-.
! /
Ii'
1.
Fig. 10. Cut all le
ads
on tw
o 10
0KQ
(bro
wn,
blac
k,ye
llow
, silv
er)
')re
sist
ors,
R34
and
R35
, to
1/2"
. Con
nect
R34
from
XV
4-1 (S2) to TB 18-3 (S4)!
Con
nect
R35
from
XV
3-1
(S2)
to T
B9-
3 (S2).
---"
"""
""""
" "'
--"
""'.
."""
,.'
"2~
('v
) F
ig. 1
0. C
ut a
ll le
ads
\)n
two
150K
Q (
brow
n)' g
reen
)' ye
llow
, silv
er)
resistors, R26 and
R27
, to 1/2"
. Con
nect
R26
from
XV
4-6
(S2)
to T
B15
-1 (
52).
Con
nect
R27
from
XV
3-6
(S2)
to T
B11
- 1 (
S3).
3. (\
/) F
ig. 1
0. C
ut a
ll le
ads
on tw
o 1.
8K
Q (
brow
n, g
rey,
red
, silv
er)
10%
resi
stor
s, R
28 a
nd R29, to 1/2". Connect R28 fr
om X
V4-
8 (C
) to
181
1-3
(C).
Con
nect
R29
from
XV
3-8
(C)
toT
B8-
2 (C
).
4.
(J)
Fig. 10. Cutall leads on two. 02
mfd
(20
K o
r 20
, OO
Om
mf)
dis
c ca
paci
-to
rs, C
IS a
nd C
16, to 1/2". Connect C 15, f
rom
XV
3-8
(S2)
to T
88-2 (S4).
Con
nect
C16
fro
m X
V4-
8 (S
2) to
TB
ll-3 (S5).
5. (\~Fi,9. 10. Cut all leads on two 3. 3K
Q (
oran
ge, o
rang
e, r
ed, s
ilver
) re
sis-
tors, R3(/ an
d R
37, t
o 5/
8". Connect
R36
fro
m X
V4-
3 (C
) to
gro
und
lug
"(C). 96nnect R37 from XV3-3
(C)
to T
B21
- 1 (
C).
6. (/) Fig. 10. Cut all leads on two. 01 mfd O
OK
or
10, O
OO
mm
f) d
isc
capa
ci-
tors
, C47
and
C48
, to
3/4"
. Connect C47
from
XV
3-3
(S2)
to T
B21
- 1 (
C).
Con
nect
C48
fro
m X
V4-
3 (S
2) to
gro
und
lug
" G"
(C),
7.
('\l
Fig
. 10.
Con
nect
a4'
! pie
ce o
f or
ange
wire
from
C37
-C (
C)
to T
B15
- 2(C
).
8. (
,) Fi
g. 10. Connect a 3 1/2" piece of black wire from ground lug "
(C)
to"'~1
2-2
(C).
9. (V)
Fig.
10.
Con
nect
a 4
" pi
eceo
(ora
nge
wir
e from TB17 (C) to C
37-C
(C
).
10.
j,
Fig
. 10.
Con
nect
a 4
1/2
" pi
ece
of b
lack
wire
fro
m g
roun
d lu
g "
G"
(C)
to T
B14
-(C
).
11. (
\)/P
/ig.
lO. C
onne
ct a
4"
piec
e of
ora
nge
wire
from
Ta1
7 (C
) to
TB
13- 2
(C
).
12. (
'I~ Fig. 10. Connect a 3 1/2" pi
ece
of b
lack
wire
from
TB
l4-2
(C
) to
TB 13-
1 (C
).
13. (
\);F
ig. 1
0. Connect the bl
ack
lead
fro
m S
lA- l
O to
TB
12-2
(C
).
14. (
I) Fi
g. 10. Connect the brown le
ad fr
om S
lD-7
to T
B12
- 1 (
C).
15.
qn
Fig.
10.
Con
nect
the
shie
ld f
rom
the
sing
le c
ondu
ctor
shi
elde
d ca
ble
from SlB-5) to TB12-2 (C). Connect the inner conductor to TB12-3(
C).
16. (
.) Fig. 10. Connect the gr
ey le
ad fr
om S
IB- I
I to T
B12
-4 (
C)
17. (,) ~ig. 10. Connect the greylead from SlG-12 to TB14-4
(C).
18. (
" ")
Fig.
10.
Con
nect
the
shie
ld f
rom
the
sing
le c
ondu
ctor
shi
elde
d ca
ble
(fro
m S
1 G
-6) to 1814-2 (C). Connect the inner conductor to TB 14-3
(C).
19. (
\/) Fi
g. lO.
Connect the black lead from 51H-ll to TB14-2
(C).
20. (
\,) F
ig. 1
0. C
onne
ct a
1 1
/2"
piec
e of
bar
e w
ire
cove
red
with
a 1
1/4
"pi
ece
of s
pagh
etti
from
J8,
9, 1
0-2
(C)
to J
8,9, 10-5 (C).
21. (
). /
Fig.
10.
Con
nect
a 1
1/2
" pi
ece
of b
are
wir
e covered with a 1 1/4"
piec
e of
spa
ghet
ti fr
om J
l1)'
12, 1
3-2 (C) to Jll, 12, 13-5
(C).
22. (
,Fig. 10. Cut all le
ads
on tw
o 10
0KQ
(br
own)
' bla
ck, ye
llow
, silv
er)
resi
stor
s, R
68 a
nd R69, to 1/2". Connect R68 from J11, 12, 13-2 (S2) to Jll,
12, 1
3-; (
C).
Con
nect
R69
from
J8,
9, 1
0-2
(S2)
to J
8, 9
, 10-
3 (C
).
~3. (
,I) Fig. 10. Run th
e th
ree
cond
ucto
r sh
ield
ed c
able
from
sw
itch
waf
erS
~B
alon
g th
e ch
assi
s as
sho
wn.
Con
nect
the
shie
ld to
J8,
9, 1
O- 5
(S2)
; con
nect
the
brow
n le
ad to
J8,
9, 1
0-1
(Sl)
, con
nect
the
red
lead
to J
8,9,
10-
3 (S2);
""an
~ c
onne
ct th
e or
ange
lead
to J
8, 9
, 10-
4 (S
1).
24. (\) Fig. 10. Run the three conductor shielded cable from switch wafer
SlH
alo
ng th
e ch
assi
s as
sho
wn.
Con
nect
the
shie
ld toJl1, 121
13-5
(S
2); c
on-
nect
the
brow
n le
ad to
J11,
12,
13-
1 (5
1); c
onne
ct th
e re
d le
ad to
J11
, 12)
' 13-
(S2)
; apd
con
nect
the
oran
ge le
ad to
Jll, 12, 13-4
(St)
.
25.
I)
Fig
. 10.
Con
nect
a 2
" pi
ece
of g
rey
wire
from
TB
12- 4
(C)
to X
Vl-
2 (C
).
26. k) F
ig. 1
0. C
onne
ct a
3"
piec
e of
gre
y w
ire f
rom
TB
14-4
(C)
to X
V2-
2 (C
).
27. (') Fig. 10. Cut all le
ads
on fo
ur 2
00K
Q (
red,
bla
ck, y
ello
w, g
old)
5%
resi
stor
s, R
5, R
6, R
11 a
nd R
12t0
5/8"
. Con
nect
R5
from
C37
- C (C)
tp
XV
l-6(
C).
Connect R6 from TB13-2
(52)
to X
V2-6(C). Connect
R11
fro
m T
B15
- 2 (S2) to
XV
l-1 (G). Connect R12 f~
om T
B17
(S
3) to
XV
2-1
(C).
tI.)
tI.)
Fig. 11
TB
21R
13T
B12
R66
R19
R65
1. (V!
Fi9.
110
Cut
all
lead
s on
two
25m
fd e
lect
roly
tic c
apac
itors, C5 and
, to
1" a
nd c
over
eac
h w
ith a
3/4
" pi
ece
of s
pagh
etti.
Con
nect
the
posi
tive
(+)
end
of C
5 to
XV
I-8
(C)
and
the
nega
tive
(-)
end
to 1
B12
-2 (C). Connect
the pos;,l
ve (
+)
end
of C
6toX
V2-
8 (C
) an
d th
e ne
gativ
e (-
) en
d to
TB
14-2
(C)0
2.
1' Fig. 11. Cut all leads on two 2.
2KQ
(re
d, r
ed, r
ed, s
ilver
) re
sist
ors,
R7
and R8, t
o 3/
4" a
nd c
over
eac
h le
ad w
ith a
1/2
" pi
ece
of s
pa~
hetti
. Con
nect
R7
from
XV
l-8
(S2)
to 1
B12
-2 (
C).
Con
nect
R8
from
XV
2-8
(S2)
to 1
B14
-2 (
C).
10. (
,A'Fig. 11. Cut all leads on two IM
Q (
brow
n, b
lack
, gre
ensi
Ive
r) r
esis
-to
rs, R9 and RIO, to 3/4". Cover bo
th le
ads
with
a 1
/2"
piec
e of
spa
ghet
ti.C
onne
ct R
9 fr
om X
VI-
2 (S
2) to
gro
und
lug
" G
" (C
).. C
onne
ct R
IO f
rom
XV
2-(S
2) to
1B
J3-1
(S4).
3. (\) Fig. 11. Cut the ground end (i
f th
e ca
paci
tor
is s
o m
arke
d w
ith a
line
)of two. 25 mfd paper capacitors
, C 1
and
C2, to 1"
(If
it is
not
mar
ked, cut
eith
er e
nd to
1"
0 ) C
onne
ct th
is e
nd o
f C 1
to X
Vl-
6 (S
2) a
nd th
is e
nd o
f C2
toX
V2-
6 (S2). Cut the other end of both capacitors to 3/4". Connect th
is e
ndof Cl to 1B12-4 (S3) and th
is e
nd o
f C2
to 1
B14
-4 (
S3)
.
11. ~
YFi
g. 1
1. C
ut b
oth
lead
so(l
a22K
Q (
red
, red
, ora
nge
, silv
er)
1 w
att r
esis
-to
r , R61 to 3/4"
. Con
nect
from
f:.3
7-A
(S2
) to
C37
-B (
C).
/ '
12. (\yFig. 11. Cut both leads on a
68K
Q (
blue
, gre
y, o
rang
e, s
ilver
) re
sist
orR
60, to 1/2". Connect from C37B (S
3) to
C37
C (S
4)0
4.
U)
Fig
. 11.
On
two
lOK
Q (
brow
n, b
lack
, ora
nge,
silv
er)
resi
stor
s, R
3 an
d, cut one lead to 1/2" and the other lead to 3/4". Connect the 1/2" le
adof
R3
to X
Vl-
7 (S
1) a
nd th
e 3/
4" le
ad to
TB
12- 3
(C
). C
onne
ct th
e 1/
2" le
adof
R4
to X
V2-
7 (Sl) and the 3/4" lead to TB14-3
(C).
13. (
) F
ig. 1
1. C
ut a
ll I e
ads
on tw
o 68
KQ
(bl
ue, g
rey,
ora
nge
si I
ver)
res
isto
r,R 19 and R20 to 1/2". Connect R 19 from S3-2
(C)
to S
3-3 (C). Connect R20
from
S3
-)C
)
to S
3-6
(C).
14. (.!Fig. 1. Cut all leads on two 33
0KQ
(or
ange
, ora
nge
, yel
low
, silv
er)
resi
stor
sR65 and R66 to 1/2"
. Con
nect
R65
from
S3-
2 (S
2) to
S3-
1 (C
). C
onnect R66 ;10m S3-5
(S2)
to S
3-4
(C).
150 (~
i9'
11. From hole
" S
" co
nnec
t the
whi
te le
ad to
S3-
6 (S2), th~ brown
lead to S3-4 (S2), the blue lead to S3-3
(S2)
and
the
gree
n l,e
ad to
S3-
1 (S2).
5. (
.)Fig. 11. Cut both le
€lds
on
two
IMQ
(br
own
blac
kgr
een
silver) resis
~ to
rs, Rl and R2, to 1/2". Connect Rl fr
om 1
B12
-3 (
S3)
to 1
B12
-2 (
C),,
Con-
nect R2 from 1B14-3
(S3)
to 1
B14
-2 (
C).
6.
(v)
Fig
. 11.
Cut
aille
adso
n tw
o.00
12m
fd (
1.2K
orI2
00m
mf)
disc
cap
aci-
tors
, C41
and
C42
to 1
/2".
Connect C41 from 1B 12-1 (C) to TB 12-2 (S7).
Con
nect
C42
from
TB
14-1
(C
) to
1B
14-2 (S8).
16.
(\,,1
Fig. 1. Push the lin
e co
rd th
roug
h th
e gr
omm
et a
t the
rea
r of the
chas
sis,
near the fuseholder. 1ie a knot inside the chassis, 3" from the solder
lugs. Con~e
ct o
ne le
ad to
J16
-1
(S2)
and
the
othe
r le
ad to
J16
-2 (S2)0
17. (
~i9.
ll. Connect the
' bro
wn
lead
from
Sl F
- S to 1"B14-1 (S3).
/'
18. (
\jig
.
11. C
onne
ct th
e bl
ack
lead
from
SI
F-6
to g
roun
d lu
g " G
" (S
9).
19. (\rFig.11. Connect a l"
piec
e of
bar
e w
ire
from
S5-2
(Sl)
toX
V5-
7(S1
).
7.
Fig.
11.
Cut
all
lead
son
two.
025
mfd
(25
K o
r 25
000 mmf) disc capaci-
tors
C7
and
CS
, to
3/4"
. Con
nect
C7
from
XV
l-l (
S2)
to T
B12
-1 (
S3).
Con
-ne
ct C
~/fr
om X
V2-
1 (S
2) to
1B
14-1
(C
) .
8. y
) Fig. 11. Cut al
l lea
ds o
n tw
o 10
mfd
, 6 volt electrolytic capacitors
C3
and
C4
, to
3/4"
. Cover ~ach lead w
ith a
1/2
" pi
ece
of s
pagh
etti.
Con
-ne
ct th
e po
sitiv
e (+
) en
d of
C3
toX
Vl-
3(C
)and
the
nega
tive
(-)I
eadt
ogro
und
lug
" G
" (C
). C
onne
ct th
e po
sitiv
e (+
) en
d of
C4
to X
V2-
3 (C
) an
d th
e ne
gativ
e)
lea9
' to
1B13
-1
(C).
9.
Fig.
11.
Cut
bot
h le
ads
on o
ne 4
. 7K
Q (
yello
w, v
iole
t, re
d, s
ilver
) re
-si
stor
, R14
to 1
/2"
and
both
lead
sol1
asec
ond4
.;7KQ r~sistor, R13, to
3/4"
Con
nect
R14
, (w
ith th
e sh
orte
r le
ads)
fro
mX
V2-
3(S
2) to
TB
13-1
(C
). C
onne
ctR
13 (
with
the
long
er le
ads)
fro
m X
VI-
3 (S
2) to
gro
und
lug
"G"
(C).
20. ,,) F
j,Q; 1
1. S
trip
bac
k th
e ou
ter
insu
latio
n on
bot
h en
ds o
f a5" piece
of singl~
nduc
tor
cabl
e 1/
2"T
wis
t the
shi
eld
stra
nds.
Str
ip b
ack
the
insu
latio
n on
the
inne
r co
nduc
tor
on b
oth
ends
1/4
". On one end
, cut
the
shi e
ldst
rand
s an
d co
nnec
t the
inne
r co
nduc
tor
to S
5-3 (S 1). O
n th
e ot
her
end
, con
nect
the twisted shield strands to 1B21-1 (SS) and the inner condu,ctor on the same
end
to 1
B21
-(S
5).
21.
r ~
11. M
ount the top shiEddasshownininsert on figure 4.
Use
two #6 IVckwashers and two #6-
32 h
ex n
uts.
...~g
~.
.~...
~oO
~Off
i'o
::.,::
.
#8 Pk.
Tin
nerm
an A
ngle
Bra
cket
Cha
ssis
Bez
elC
ontr
ol P
late
#4-40x1/4 Screws
000
O~~
~\~~
:
Scre
w#8
-32 Tinnerman Nut
Side Bracket
#8-32x3/8 Brown Screw
#6 Pk.
Fig.
12
Brown Screw
FINAL STEPS
of the cabinet from the ou
tsid
e, u
sing
a s
mal
l scr
ewdr
iver
. The
fla
t por
tion
shou
ld b
e th
e ac
tual
res
ting
or c
onta
ct s
urfa
ce.
You
hav
e no
w c
ompl
eted
the assembly and wiring of your amplifier. W
hen
you
have
com
plet
ed th
e fo
llow
ing
step
s yo
ur ampl ifier will be re
ady
for
use.
9. ( ) Fig. 12. In
sert
the
perf
orat
ed c
over
into
the
"rai
ls" on the side pieces
and
slid
e it
forw
ard
fully
.
1) T
o ca
tch
any
wir
ing
erro
rs, i
t is
sugg
este
d th
at th
e en
tire
wir
ing
be c
heck
edpo
int-
by- p
oint
aga
inst
the
wir
ing
inst
ruct
ions
(an
d pr
efer
ably
als
o ag
ains
t the
sche
mat
ic w
irin
g di
agra
m in
ord
er to
bec
ome
mor
e fa
mili
ar w
ith th
e co
mpo
nent
layout and circuitry). W
hile
doi
ng s
o, c
heck
for
ros
in jo
ints
, loose lumps of
sold
er, p
oor
lead
s dr
ess,
and
acc
iden
tal s
hort
s or
leak
age
path
s ar
isin
g fr
om th
efl
owof
ros
in b
etw
een
cont
acts
(re
mov
e w
ith a
stif
f br
ush
dipp
ed in
car
bon
tet-
rach
lori
de, b
eing
car
eful
not
to s
prin
g co
ntac
ts w
hen
clea
ning
sw
itche
s).
10. ( ) Fig. 12. Mount the co
ntro
l pla
te o
n th
e be
zel (
loca
ting
the
hole
for
the
plas
tic p
ilot j
ewel
, abo
ve a
nd b
etw
een
the
focu
s an
d ba
ss c
ontr
ols,
ove
rth
e co
rres
pond
ing
hole
in th
e be
zel)
, usi
ng tw
o ea
ch #
4-40 x 1/4brass screws,
'410
ckw
ashe
rs a
nd #
4 he
x nu
ts to
fas
ten
it to
the
beze
l. Press the plastic pilot
jew
el in
to p
lace
on
the
cont
rol p
late
.
2) In
sert
tube
s V
I thr
ough
V12
in th
eir
sock
ets.
Be sure to insert the cqrrect
tube
in e
ach
sock
et. P
lace
a s
hiel
d ov
er tu
bes
VI,
V2,
V3,
and
V4.
See
tube
layout in instruction. In
sert
fus
e Fl
, in
fuse
hol
der.
11. ( ) Fig. 12. Fit the bezel and control plate over the projecting control
and
sl id
e sw
itch
shaf
ts, o
nto
the
ends
of t
he s
ide
piec
es a
nd th
e pe
rfor
ated
cover. Assemble the bezel to the side pieces with four #6 x 1/4 br
own
colo
red
P. K
. scr
ews.
Before tightening the screws finally, be sure there is
ade
quat
e. p
lay
to s
lide
the
perf
orat
ed c
over
out
.
3) If you have a VTVM
or
VO
M, m
ake
the
follo
win
g re
sist
ance
che
cks
befo
reco
nnec
ting
to th
e a-
c lin
e: C
heck
for
a c
old
d-c
resi
stan
ce o
f at
leas
t 1/2
0hm
across the a-c
I ine
plu
g; c
heck
for
a re
sist
ance
of
at le
ast 4
0 ohms between
grou
nd a
nd p
ins
1 of
XV
II a
nd X
VI2
; che
ck f
or a
res
ista
nce
of a
t lea
st 2
00K
Qbe
-tw
een
pin
30fX
Vll
, XV
12an
d gr
ound
. Allo
w s
uffi
cien
t tim
e fo
r th
e el
ectr
olyt
icca
paci
tors
to b
e ch
arge
d by
the
ohm
met
er b
atte
ry in
this
last
mea
sure
men
t.T
hese
mea
sure
men
ts c
onst
itute
a r
easo
nabl
e ch
eck
of th
e po
wer
sup
ply
com
-po
nent
s an
d w
irin
g be
fore
app
lyin
g po
wer
. If y
ou d
o no
t obt
ain
the
min
imum
resi
stan
ce v
alue
s in
dica
ted,
do
not p
roce
de to
the
next
ste
p un
til th
e ca
use
isdiscovered and the condition remedied.
12. ( ) Fig. 12. Fasten the perforated cover to the two tinnerman angle
brac
kets
(pr
evio
usly
mou
nted
on
the
rear
edg
e of
the
chas
sis
surf
ace)
and
the
two
angl
e br
acke
ts o
n th
e si
de b
rack
ets
usin
g fo
ur #
8 P.
K. T
y~e
Z s
crew
s.
13. ( ) Fig. 12. Set al
l con
trol
s to
the
furt
hest
cou
nter
-clo
ckw
ise
posi
tion.
Mou
nt th
e knobs on the shafts with the indicating dots pointing as fo
llow
s:IN
PUT
SE
LE
CT
OR
kno
b at
AU
X; a FUNCTION SELECTOR
at S
TE
RE
O; F
OC
US
at -5; LEVEL at 0; BASS knobs at -5; TREBLE knobs at -5.
5. (
) F
ig. 1
2. O
n th
e re
ar e
dge
of th
e ch
assi
s su
rfac
e, m
ount
the
two
tin-
nerm
an s
peed
nut
ang
le b
rack
ets,
usi
ng a #8 P. K. - T
ype
Z s
crew
for
eac
h.
14) OPERATIONAL CHECKS ON
CO
MPL
ET
ED
KIT
S: I
n th
e IN
ST
RU
CT
ION
part
of t
his
man
ual y
ou w
i II f
ind
a se
ctio
n titled "E
lect
rical
Inst
alla
tion
". Read
this
car
eful
ly a
nd c
onne
ct y
our
spea
kers
, phonograph)' and tuners to the ampl if
ier
in a
ccor
danc
e w
ith th
e in
stru
ctio
ns g
iven
. The
n re
ad th
e se
ctio
n tit
led
"Ope
r-ating Instructions II
and
oper
ate
all t
he c
ontr
ols,
che
ckin
g au
rally
for
the
resu
ltsde
scri
bed.
If
the
ampl
ifie
r do
es n
ot o
pera
te a
t all
or o
pera
tes
inco
rrec
tly, u
seth
e T
RO
UB
LE-S
HO
OT
ING
cha
rt a
nd th
e V
OL
TA
GE
& R
ES
IST
AN
CE
cha
rt
discover and remedy the difficulty. As the Trouble Shooting Chart presumes a
prop
erly
wire
d am
plifi
er, w
hich
may
not
be
the
case
, rec
heck
the
wiri
ng fo
rer
rors
or
reve
rsed
con
nect
ions
and
con
tinui
ty.
4. (
) Fi
g. 12. Assemble the le
ft a
nd r
ight
sid
e pi
eces
to th
e ch
assi
s. E
ach.
side
pie
ce is
mounted with two #8-32 x 3/8 brown colored sc
rew
s, tw
o #8
-hex nuts, and two #8 lockwashers.
6. ~ ) Fig. 12. On the bottom flange of each side piece, press a tinnerman
#8-3
2 -
Typ
e J
spee
d nu
t in
plac
e ov
er e
ach
of th
e th
ree holes. The sh
orte
rle
ngth
of
the
nuts
fac
e up
towards you.
7. ( ) Fi
12. M
ount
the
botto
m p
late
on
the
botto
m fl
ange
s of
the
side
piec
es,
using six 8-32
x 3
/8un
colo
red
scre
ws.
Not
e th
at th
e re
ar f
lang
e on
He
bot-
tom
pla
te fi
ts o
ver
the
outs
ide
of th
e re
ar c
hass
is a
pron
.
15)
If th
e am
plif
ier
is to
be
mou
nted
in a
con
sole
, rea
d ca
refu
lly th
e "M
echa
n-icol Installation II
sect
ion
of th
e in
stru
ctio
ns a
nd f
ollo
w th
e pr
oced
ures
out
l ine
d.
8. (
) F
ig. 1
2. In
stal
l the
rub
ber
feet
in th
e op
enin
gs p
rovi
ded
in th
e bo
tiom
plate. The method is
to w
ork
the
roun
ded
port
ion
of e
ach
foot
into
the
inte
rior
16)
Det
aile
d in
form
atio
n as
to c
onne
ctio
n of
pho
nogr
aphs
, tun
ers,
etc., to the
ampl
ifie
r in
puts
and
spe
aker
sys
tem
s to
the ampl ifieroutputs, os
wel
l as
a-c
line
plug connections and'
use
of th
e hu
m a
djus
tmen
t con
trol
, is
give
n in
the
"Ele
c-trical Installation"
sect
ion.
Rem
ove
the
back
ings
fro
m th
e tw
o la
rge
labe
ls s
uppl
ied
and place them on the
outs
ide
surf
ace
of th
e bo
ttom
pla
te. S
ee f
igur
e 4
for
plac
emen
t of
smal
l lab
el.
SER
VIC
E
cepted for repair. Instruments that sh
ow e
vide
nce
of a
cid
core
sol
der
or p
aste
fluxe
s w
ill b
e re
turn
ed n
ot r
epai
red.
NO
TE
: Before returning this unit, be
sure
all
part
s ar
e se
cure
ly m
ount
ed. A
ttach
a ta
g to
the
inst
rum
ent,
givi
ngyour home address and the trouble with the unit. P
ack
very
car
eful
ly in
arugged container, using sufficient packing material (cotton, shredded ne
ws-
pape
r, o
r ex
cels
ior)
, to
mak
e th
e un
it co
mpl
etel
y immovable within the con-
tainer. The or
igIn
al s
hipp
ing
cart
on is
sat
isfa
ctor
y, p
rovi
ding
the
orig
inal
inse
rts
are
used
or
suff
icie
nt p
acki
ng m
ater
ial I
s in
sert
ed to
kee
p th
e in
stru
-m
ent i
mm
ovab
le. S
hip
by p
repa
id R
ailw
ay E
xpre
ss, i
f po
ssib
le, t
o th
e E
lec-
tronic Instrument Co., Inc., 33-00 Northern Blvd., L.
C. 1
, New
Yor
k. R
e-turnshipmentwill be made by express collect. N
ote
that
the
carr
ier
cann
ot b
ehe
ld li
able
for
dam
ages
in tr
ansi
t if
pack
ing,
IN
HIS
OPI
NIO
N, i
s in
suff
icie
nt.
If y
ou a
re s
till h
avin
g di
ffic
ulty
, wri
te to
our
ser
vice
dep
artm
ent l
istin
g al
lpossible indications that might be helpful. If
des
ired
, you
may
ret
urn
the
in-
stru
men
t to
our
fact
ory
whe
re it
will
be
plac
ed in
ope
ratin
g co
nditi
on fo
r $1
2.pl
us th
e co
st o
f par
ts r
epla
ced
due
to th
eir
bein
g da
mag
ed in
the
cour
se o
fco
nstr
uctio
n. T
his
serv
ice
polic
y ap
plie
s on
ly to
com
plet
ed in
stru
men
ts c
on-
stru
cted
in a
ccor
danc
e w
ith th
e in
stru
ctio
ns a
s st
ated
in th
e m
anua
l. In
stru
-ments that are not completed or instruments that are modified w
ill n
ot b
e ac
-
MO
DE
L H
F81-
2 A
DD
EN
DA
Plea
se m
ake
the
follo
win
g co
rrec
tions
to y
our
HF8
1-2
book
:
Page
7C
, Ste
p 7.
Page 16, Symbol #R22, 23 Stock
#180
45
Schematic R22 and R23.
Part
sup
plie
d m
ay b
e du
al 5
00K
C in
stea
d of
750
KC
. Thi
s is
a d
irec
t rep
lace
men
t.It
doe
s no
t im
pair
the
perf
orm
ance
of
the
ampl
ifie
r in
any
way
.
Page 13. va, Pin 7 should read
1500
in
stea
d of
330
KC
E. 1209
Electronic Instrument Co., In
co,
Long Island City 1, N
ew Y
ork