21
AC POWER SUPPLY MODEL HP-23A
AC POWER SUPPLYMODEL HP-23A
Assembly
and
Operation
of the
AC POWER SUPPLYMODEL HP-23
A
TABLE OF CONTENT.S
Intrcductloa, *
PKTis Ust
St«p-By-Step AasBDiblyChassia Part? MoiitUinR, , . . ,
Transformer WiriiiE
Chassis Wiring. .,•...>•Component Installation, , . . ,
Final Wiring.
Final Aasemtity. , . • , . « .
,
Mtfal T^,„. « . 4 ^ > .
Opprotion, , ,
Jn Case Of DlHlcvOty.
Trmible^Octfing Chai^ . . . ^ . . .
SpeclJicatlona , ,
Circuit Deficrtiit^pn.
']^o«digEi«db, , . ^ . . .
«
Factory Repalir ^eipke. ^ .(fold-out
^^). ^ .
Heplacement Parts Price Lial. . ,
Z
3
4
7
1
B
1011
12
13
u13
16
17
IT
18
Id
19
HEATH COMPANYE^Er<ITOl^i HArtBOrt,. MICHIGAN ^aoaa
Page 2
INTRODUCTION
Supply IS used tn sflec^t the value of low B-i-
voltage available at the outpul socket. The switch
sdso wtU turn off the Power Supply, A circuit
breaker in the primary circuit proviitefl oyor-
load and sbort circuit proCectioo,
All output voltage connectiona Irom the PowerSupply are tnaJe^ througti thepoweroulput socket
on the ch;ispi..s. This provides an easy means of
rapidly chau^nig the equ^meat from mobile to
The Heaihkit Model HP-Z3A AC Power Supply
is designed to ;proiditoim tbe peceasaryc^ei^^iog voltages f6r fixed statioD operatitni cl
Heatbkit anialeurradJQtransceivers.The versa-
t^ity and many features of tbis Power Supply
Idso mB^:U Iteilforvae in^ittu^otheE types
d aau;teuF roi^ equlpmeot,
nwi^wgrn^ fty^iefttureaahlghvoltage source,
a choice of two low voltage sources, fixed and
adjustable bias Bources, and 6,3 and 12.6 volt
fflament MtureeSi Sactensive fllterliiE and good
regulation is provided for the DC sourcea. Tbepower iraiislormer has a dual primary Winding
iA4iict] can be connected for operatlonfroiti eitber
ISO or Z40 VAC ]^Dwer lines,
A aeries connection is provided at the power
ou^ut socket to permit turning the Power Sup-
ply oo or oft remotelyfrom ffi* *^^ment with
^rtiich It Is uaecL A toixte snCUelim tbe Power
Refer to the IQt Btiildere dulde fOr complete
informatioii uu anpackmc, parts Identification,
tools, wirlng,solderiiigandstep-by-BtepUsem-
bly procedures.
,3
PARTS LIST
To order replacement partiS, refer to tl»
Replacement Parts Price List and uaethe Part*
PART PARTS DSaCRIPTlOET'_Mi>. Per.Klt
"
WOTE: The numberB in i^ajentheBOB are keyed
tbe nun]t>erB oa tb# ^uts Pictorial ffold-oot
PARTNo,
PARTSPer Kit
DESCRlPll(»>
FtESISTWS
U) 1-15-2 1
1^24-2 S
CAPACITOftS
25-aB[4)25-34
1
4
HARDWARE
#6 Hardware
tS) 250-8
{7)252-3
(8)254-1
B
g
#e Hardware
(ft)2M-l37 6
{10)252-4 10(11)254-2 10(I2J259-2 2
MISCELLAJ«£OUa
10 K2 1 watt (broTPn-black- (13)10-57 1
orange) (14)57-27 7
1 ksa 2 watt tbrowD-blactc- (15)431-40 1
red) (16)431-55 1
100 2 itECti (bronm-tiiack- (I7j43l-l 3.
yellow)4S1-3 2
20 u-F electrolytic
40 (iF elertrnlytlc
125 JJ.F tat><-mount
eiectrblytiD
4Q X 3/8" sheet metal
out
«6 lock«tt«tier
8-32 X 3/8" screw8-32 nut#a lockwasher#6 Bolder Ing
(IB) 433-29
(19) 440-1
(20) 434-llB
(21) 435-1
(22)61-12
(23)65-17
t34)73-l(^)73-4
54-19fl
48^22200-505205-168-1100-638-1
screw ^26)261-6347-lB346-1
39-19
490-5597-260
m-m
10 Idl tid>^TTK»fi)i controlSiUcon diode
i-lug termiual atrip
6-Iug terminal strip
Metal capacttOT mountingwaferl^ienollc CBp&ottor raoimtinB
waferII -pin plug
Plug capll-pm socicet
Socket moiml^ig tiHgDPDT toggle switchCircuit breaJcer
3/B'' grommel5 'IP" c^rommelPower transformerFilter chokeChasBiaBottom plate
Cabinet shell
Rubber foot
Black sleeping
lAna cord
Nut starterParts Order FormKit Builder a Guide
Mamial (See front cover for
partmWnr.)Solder
STEP-BY-STEP ASSEMBLY
NOTE: Before you begin to assemble tlils l^t,
refer to the iQt SuUders Guide tor completeinformation oti wiring, soldering ^aml Btep-t^-step assembly procedures.
As you perform a step in the Step-By-Step As^Serably, first read the step completely through.
Then perform the operationaa directed. Position
each part and wire as showninlhe Pictorial that
accompanies the series of steps. The Details
HOLt THE SOCKtT 1h THE CHASSIS HOLt AMD 9il,Cf OhE ^H^Of THE VINC iHTOIHEfllOmOl ?.HtSOCKI|. USING A
THt SQCfin,
ipttoH IB
Loekwasbers and nuts will be used with mostscrews when mounting parts, unless the stepdirects otherwise. Consequently, only the sizeand type ol hardware to be used wlU generally becalled out in a atsp. Tor eirample, ihe phrase"Use 6-32 X 3'B" hardu/jre" means to use aB-32 X 3/8" screw, one or more #6lockwashers,and a G-3Z nut. Brier to the iJefAils assodatedwith the a(pp for the proper installation of thehardware aiid the correct number oi lockw^hers.
CHASSIS PARTS MOUMTrNG
Refer to Pictorial l for the following steps.
( ) Install the 10 kn tab-mount control at A onth« ebiuls as shown in T>etail lA, Positionthe control lu^s as shown m PicloriaJ USecure the control by bending the tabs
agidAatCte di>u£> aa adkovn.
Detail U
( ) Refer to Detail IB and mount the ll^plnsocket at B with the teyway posttloned asShown, Use the soclcet mounUog ring.
( } :tni^flie 3/d"^omoifitia h[^C.
NOTE: The Heath 6oi^any has provided a
plastic nut starter with this kit. Use this not
starter to hold and start 6-32 nuts cm sc»wa.Refer to Page 3 of the H3i BalUsrs Guide,
Detail 1C
WCTTE: To insure a good ground coiinei'tion, onthe underside of the chassis acrape away q smallamount of paint around the mouatingbolesfor thepolder lugs at the terminal strip at L, andQte two holes each for ci^usltors H asA %t
i ) SX^T to DetAll IC and install a metalCs^flUtltor mounting wafer at H and a 6-lugterininal strip at J, Install the mountingvafer on the top of the chassis and the ter-minal strip under the chassis. Use 6-32 x3/8" hardware. Position the terminal stripas shown in the P^ciif Be sure to use twolOtAwasheiTS wjth aU terminal atripfl,
( y ^if^tmt tli^ ^fat^ fetal rapacUor mountingVito:Sa'Mi'.:di'tfie chass;s atK.Use 6-32 x
{ ) in like manner, mounl phenolic capacitormaunimt; wafers on top of the cbaOKA at-l'
and C, Use 6-32 9t 3yfi" hardware.
( ) Refer to Detail ID andpreparelhe mountingfoot of a 4- lug terniinai strip. Cut the frontof the foot wlthdjational cutters, then spreadthe cut until an 6-3Z screw will fit thrcH^thoh^. This terminal strip willberaQudfidwith the filter choke in tha foUowing st^is.
Dsnll ID
Detail IE
{, ) Cut both leads of the filter dkomtoaleogUif 4-l/2'\ and remove 1/4'^ Of |n«a«titmfrom the cut end of each. Meftsurethe leads
(rom where they leftT* the cbCdM. A^ly fL
mM$X suaiount of Kdd«r to a«aado£ ch^^l&ad after entm^
( ) B^er to DeUll IE and position the filler
choke on top of the chassis witli its leads
through grommef D, Mount the choke with
B-32 a 3/B" hardware at L and M. with the
prepared A-lxkg terminal strip at L and two#6 solder lu^s at M, Be sure to use twolockwashers with the terminal strip. Posi-
tion the solder lugs and terminal strip asabowQ. &en4: tbe end irf the aolder lu^ opaway from^ ^issia.
ttEMUBE AU liAHi FFtirM WHfRETHEV |-Ej(Vt THE TRAAI onr^Zlf
BLA ]-
BtK -CS>< ]-
BLK SED ]
BL< -YLL
BED y
m y
eiu 4"
SIM IDQhDI
Dottll TF
NOTE: Use the scale un the fold-out from Pa.ge 8Iqr measxiPifis wires la me fi>lio«^ rflfi^
( ) Refer to Detail IT and cut the PowerTransformer leads lo the foliowine lengths
^measured from where theyleikve ttie traas-
WIRE COLOR LENGTH Detail 1G
Black
Block-redBlack-yellowHedRed- yellowYellow
Hue
3rX/2"
3-1/2"
3-V2"
3"
5"5"4"
do not cut
t ) Reiuove 1 4" of insulEition from (he end of
each cut trans£ormer lead, aniinieltajsmall
amount of sol^r on the t»re<t end bedd
( ) Mount thp power transformer In the large^OUt on the rha.isis as diown in DetailIG, use #8 loi'kwashers and 8-32 nuts.
I ) Refer to DetaU l.H and inslaU 12S tab-mount electrolytic capacitors In thejriflmrt-
Ing i*afers at F, G, H. :\nd K, Insert the
capacitor IiJsS^lto the wafers, makiDgsurethat the cibdn^^g lu;^ of each capacitor isoriented 3s shown on thE' Pictorial, XhenIwist each mounting lug 1/fl turn.
QHlEUr THE CflP^CIIOl SIIO*N 4h IHlFi,ct(*riaLhTheh push ike LUG^ tjt \HtGtPMCUOf INTO IM SLOTS Of THE HMttl,
CONNECTIklCLOS
in I'L fti;E
l/i TtJBh.
DINO
LUC 5
THE CAPiWITOl
AfP |lOXIIfl*«Ll'
TbiB completes the ChEisais Parts Mounting.
CAUTION: When the chassis is bottom aide t^j,
its vel(?ht will rest on the transformer and the
inoi;noil i^apacitors. Take care thai you do not
.^una^e the ci^acitorB during the remainder
TRAN^ORMER WRING
nef^r Pictorial 2 (fold^out from Page 9] fortue ^niowlrtEF at^s. Portion all virea andloado
LRftB COliCfft COHMECT TO
{ ) Red ]u(v 2 .iftermindlalrip J(NS),
( ) filii« lug 4 of termlnalBtrlp J(lf3).
[ ) Red-y«iao« Ii« 1 bf t9i^mr H
I ) Greea lug 8 of Socket B (S^l).
\ ) Yellow 11^ 2 61 socket B iff-lU
[ ) Houle the brown and yel]uw-br<jwn leads ag
flho-™ In the Pictorial. These leads will be
connected later.
Altemdia Ufm VolToffe Wiring
The power transformiEr In this Power Supply l9
equipped with a dual primary windi-iie- "'^"1''
(fljerated from either 105-125 VAC or 210-250VAC, depending on the way in which thepr&t^lTyleads are roiinecletl. Twu tt^ly wiring iustruc-
lionB are given. Use only the instructions which
120 VAC W^ltiB
{ ) Connect the black-yellow and black-red
tranfffonner I^ctsto-^^ftorsocket
C ) Connect the black and blacl^greezi trana-former leads toi h« C of termini B^ip
240Vja:"B^Miig
Befer to Detail 2A,
t ) Connect the black-r^d trwwiomBrlBad to
lug 9 trf soefcBt B f^l,
{ ) Connect the black trBuaformer lead to
lug ^ot^m^ au^ 2
( ) Connect the black-green and black-yellow
transformer ISadft tiQ'l^ 5 OCtenniiiBlSb-.lp
CHASSrS WIRING
{ ) Connect the red filter choke lead extending
through grdmihet D to lug I of c^^acttor K
( )Connect the blackfUtexchokeleadextcmdlAEthrouf^ grommetD totoglt^tennlnaivbTfp
( ) Cut a 9^' length of the B-wtre cable. Refer to
D^^iill SS and remove the individual wires
ttpXn file 9" cable. These wl^res wiU.beiuediaGwtoilowxng steps.
0«tari 2B
j^the foUowlDg step you will bedlrectedto prepare wirCB for coanection. To prepare awire, cut 11 to the stated length and remove 1/4"
Gf tlUulBtlon from each end. Meli a small amountat seA^r goto efcb esg^osed end to hold the
«1» ifl^^iadsitoie^Mr.
{ ) IVcpare tho fuUowing kn^tha of wire. TbH vHUH ut
( ) Conned a t-l/2'^ red we from 1 iV^TJ%|^|q«^(f^S) to h« 2of cipuitor F (NS).
( ) Corme(4 a 5" red wire frm 4 of uditt B{S4) to
to log 1 oftaniu^ itrip t (NS).
( ) ConneclMB^'yidlow wire from lw|iX<rfa<MJ«lB <S4)
to blgS ortBOuirul Bbip L
( ) Connect I fhibbj^T crfiikp^til
(S I ) u, hjg 1 of c4p4?itQr H ^l>,Ai» soUrr tuc*^tin mouoMng w>fer (S-l).
to log S of c«rvb«LAl&l>
COMPONENT INSTALLATION
Ref» to PlctoHal 3 for the foUovioff Rt^^
NC^; ra^iibw ived ftre Z ^tt uideafl
specified ote^rvise In. fte *t^a*
C ) Cetmect a 106 Icfl (erro«tb4ffiuA-yelIow)resistor from lug 2 of capacitor H (S-1) lo
lug 5 of capacitor F [S-lJ. Apply enoughbeat and soidtr toIt^2 of B to colder It toHie mounting mievt
( ) Ccmnect s 100 kfi Omvii-hlac^yeUow)resistor from lug 1 of aapafittcur H (5-3) tOlug 1 of capacitor F (NS|,
( J Connect a 100 kn (browi-black-yellow} re-Blator from ii^ 5 of c^acttor K (S-l) to
tuff 3 of ts^ftcttc^ 7
i ) Connect a 100 kO (bromi-bZack-yeUowJ re-sistor between higi 1 0^ imd 4 (&^1) ofcapacitor F.
( ) Bn&da a 1-1/4-- len^ CC&lick sleeving onCMC uad of a IQO ka (brdvm-black-TellowJresistor. Then connect this lead tolxigloiterminal atrip L fNS), Connect the otherlead to the indicated solder lug at M (NSJ.
( ) CenmeCt a lOOO p. (brown-black-red) re-Jristo from lug 3 (NS) to lug. 4 (NS) oft«rmliial atr^ L,
( ) Connect alQkQ (brown-black-orange) Iffatt
resistor from lug 1 of control A (S-1) to
tog 2'oCteraahttl'Atv^ (^1).
( ) Connect a lOkfi (b[ 0^tii-biack-oraiige)l_^Jtresistor trom lug 3 of control A.flMltOlug'3 of terminal atrip L (NS).
( } Cci&nect tiie posigve {+) lead of the 40electrolytic CG^^ltor to lug I of terminalatr^ L (S-4), Connect the other lead to 1hAIndicated solder lug at M(S-l), Positli3titl|l«
iC^^Qltpr aa sbpwn in the PlctorlaU
C ) Cut tlie negative {-) leads of eaoh of the
two 20 iJ-F electrolytic capacitors to a length
a 1-1/4", raw intu^i^mm 5* *^bM*^ietfrtxvfm the nega^™ l«ad0.
( ) Connect the positive (+) lead oTone ofihe 20jiF electrolytic capacitors to the indicatedsolder lug at M (NS), Connect the negativelead to lu^ 3 of terminal strip L Po-sition this capacitor next to the 40 tiF es-pacitor installed jstrei^ouaty,
( ) Cclinect the positive lead of the other
20 ixF electrolytic capacitor to the indicated
aoUer lug at M (S-3). Connect the negativelimd to log 4 of termioal etr^ h EKB),
Page 9
DfCflfl3«
Refer to DetaU 3A to Waidify the cathodeleads of thp silicDrt diodes Uut WlU bewd Inthe following ateps,
i ) Connect the c^:ithode lead of a sUlfjon diodeto lug 1 of ciipacitor F (S-4), Connect theomei' Uadto big 1 U^ftmn^^ J'^«
( ) Connect the cathode lead of a silicon diodeto \Mg 1 (S-2) andtheotherles«lto iBff Z (Nfl)'
of terminal strip J,
( J Connect the cathode leadof a silicon diode to
luff 2 (S-3) and theoQierleadtolug 3 (W) atterminal Strip J«
( } Coniieot the cathode lead a slUcoa cttOdfi
to lug 3 [S-2) and the other 1©acI t&lUS4{S-3) of terminal strip J,
( ) Connect the cathode lead of a silicon diodeto lug 1 of capacitor K (5-2). Connect theG^'Br lead to lu^ X ttf c^^tor Q (HG),
( > GonuBijite G^K)d«fleaUl ftf aaUlcon diodeto liig 1 itf (uaacltor G (S-3). Connet'l (In-'
other lead to big 5 of capacitor K (S-1),
Apply enough beat and solder to lug 0 toaolder it to tb« mounUag wafer.
FINAL WIRING
Rftfer tc ^ettmiX 4 fot the following sreps,
[ ) ibstajn E^T toggle flwllcb at N asfllioim in BeftiH 4A, Bae ffie l&ttctwarit
supplied wtlh tho switch, and pOsiUoa Ifeo
niii un Ihr- bu?ihm^ as shown,
CAimON. installing th« circuit breakerin the lallowinf^ step, make sure the circuit
breaker body clears the adjacBnt wiring of ea^pat^itoE H At least 1/S",
{ ) Refer to De-iail 4B and install the tircuU
breaker at P witli the solder lugs oriented
as Aiown. B^d ite imnintin^^^i&i4afi«hQ«n.
1 ) Connect the brown lead Irom the powert4^m^0maetT to lug 1 Cit ffv^teh K <B-1).
( ) Connect thti yellow-bruwii lead from the
power tranoEormer to lug 3ot#wltCh!4 (1^5).
C ) Install a I" length of black sleeving oneacBlead i f .1 -sjhcon diode. Connect the cathode
lead of thia diode to ;ug 3 of switch N {S-Z)
and the omer lead tbl^"4^t«n7lBiiial stt^
( ) Pr^afe the foUoii^ lextgOts Of w^e:
5" black1-1/2" black
{ ) CtBinect a 4" blue wire from lu^ 5 ol capaci-
tor G (E^l) to ii« 2 ^ awiteh N i^-lh
{ } Connect a 5" black wire Irom iuf ,5 ol
switch N {S-D to lug Id ttf
{ ) c3*OTiectal-l/2"blflckwlpefro[nluE4CS-!)
tob% S of OTTitcbK.
( ) Connect a 1-1/2" black wire from lug 6 of
switch N (S-2) to lug 2 of circuit breaker P
f ) Melt a small amount ctf solder onto each uf
the baT i d ends of the line cord Jo hold the
wire strands together. Then insert the end
Of tbe cord throi^ p'oinniet C ftOd tie
a knot 6'* from OWL
( J Connorl one of the line cord ^ritCS to lug 1oT circuit breaker P (S-IJ,
( J Connactthe remalninElinecordwlrptoiugetermina! strip J (S-3) [S-2 il wired for
240 V,] PuL any escesa line cord back
that is iM Insl^ the ctoailH shoipn,
iniis eoB^letcfi the wiring of the Power Supply,
Carefully examine all euoneClions, looking foriinscldered ^-tJiim^i-tjons, short clrcuita, andloose wires or components, Malce surethatnooe
the luRs of soclcet B are touching c^oh dtlKr.Tip and rthiike the- Power Supply to dislodfie
any wire clippings or bits of solder Oiat ja^haVe fallen into the wiring, then pv^&6^ &fiFinal AaBstnliay sectloa that follf^s.
FINAL J^SEMBLV
Bcfsr lo Pictorial 5 for the foUowing stepa.
C ) Install ioar rubber feet on the bcittomplate.Vae e-32 X 3/B" screws, #6 loelcwa^ers,and fi-32 uuts,
( ) histali the blue and white liAXtt fx^ ttie
battoth plate atme locatk^i sh^vn Ut EHc^torial 5, Carefully peel ,iway the backincpa±ier and press tiie label into position. Besure to rtf«r to the naiuberd cm^Blabdin any ronimunication^ v'>m hare "wi^ tile
Heath Company about thi^j kit.
TA>^lNC CARE NQl ID i;uT iHt IPJVEIE COND-JCTnR^IttMDVt iwt OUTfiC iMSUkAtlOh Of THt Cn^ll
REMOVS THE IFuNLP IhSUlftlI ON. IrtEN iPPtY
BOLDER TQ TH£ EVOS Qf THE IHNEX CONflUOTUrS.
( ) Install the bottom idate on the chassiswith #6 X 3/fl" sheet metal screws.
.( ) Install the cabinet shell on the Ch&MejB, UflQ
#6 X 3/a" sheet metat wrewtf.
Power CMb
( ) to Detail 5A An^ prepOM Ott eod CCthe S-Mre cable.
( ) PiacB the plug cap over the prepared endcf the cable and, referring to Deiail 5B,connect the c*U6 uiraa to tha IX-pUi
{ ) Kack a (a-1)
( J Orange 3 (S-1)
( ) Green i (S-1) lor -130 V bias, or
11 es^lj fen' «4justatae: bias.
< ) Aed 6 <S-1) for 12 V filainenU, orB ^1) lor 6 V fUAJoents.'*
more ^an 0 ranper^v ttf' fllAmant currentwill be drawn under 6 volt riper:LtiGn, s>aj'alliel
the red cable wire wit]i a lengtu of #18 wire,
( ) Brown fl (g^ij MLQW.
( ) Blue 10 OSb-l] 5EB NOTEJ ^ZiOW,
NOTE: If this Power Supply is to be UdCri with
©qulptnent that does ort hkve provisions for
switching the AC power on and ott. install aJumper wire between pins & (S-1) and 10 (S-1)of the U-p3n plug. Be sure that the brcnniaA^blue cable wirea are IfOT connected tothSMi^*
JUMP£ttID L/g.
tKS.THS.
SOLIU
DeCaik 5B
If this Power Si^ly is to be used with eciuipment
that dj^es !nve provisions for switching the ACpower un and oil, connect the brown and blue
< | ;%a^ £M cap ^&to m« t^dMw fiObU pln^
This cotupleies the assembly of your Heathkit
AC Power a^pfply. Proceed to. the Inttiftl T«stfl
INITIAL TESTSTo avoid possible damage, it is itnpurtani that
you use an ohmmeter lo make the following re^slfitance checks before connecting or. turning onOie Power Simply, If all measuremontHRrcflaHs-factory, proceed to the Operations secHon, It
any of the measurements do not agree with theTiluea m tte table, refer to the fa Grac df DH-flctilty sect inn, DO NOT turn on the PowerSupply until the difiicully has been corrected,
( ) Set tbe ohroEEieter to ifae R x 1 scale.
Because Homt at the circuits to be measuredcontain diodes, you'Will obtain different reslat-anec readings if tlu pti^My of ihe meter leadsis rCreFsed Id tint foUowing meaauremeats.
Therefore, in the first step you will detemaoethe polarity of the ohmmeter test leads andcomMCt tlie .proper lead to chaasts ground.
( ) C^ect.the negative loadolthemetertolug3 and the positive lead to lug 4 of termkni.^trip J, If theresistanoeifl^proxlmatelylOohms, connect the negative meter leadtopini (ground) of the power output socket forthe following resislancerhecks, If the meterneedle remains on or near the inlmity mark^ld£ scat«}, revei^e the meter leads. If younow get a readli^ofsqiproxii^ely 10 ohms,awmect the positive lead of tbe meter to pin
^f<vwor ontpot socket
Page 13
< )M ?6u^ c4a)4m«ter totheftTclOkFasfst-
Itbiv use ttA remaining meter lead to ^rerifT tiia
resislanre meaaureniptits In each of the follow-
LnR slepa. Note thai the resistance at pm il wxUvary with the setting of the BIAS ADJUST controLWbeu UieJiieter needle continues to move upscale,ttlricHeaies that there is a large capacilor in thecircuit. Give the needle a few seconds to com-plete its movement belore m^Jcii^ the reaiSinE.
SOCKET pm
C ) 1
( ) 2
( ) 3
( ) 4
Infinity
7& minimum
T5 ko minimum
aOCKET PXM
B'
6
7
8.
11
OHMS
Bctflnity
Infmity
.0 IE
Infinity
fitftelty
Infinity
IflOTE^ DO NOT tlfflimtbe Power Simply until
proper connef t"'r fnr vour equipment has beeninfltaUed. as outliLud tn Uje following Operations
fleets of tbis Mumat
OPERATION
CAtni(»J: The (ju1pii[ volta0:e of this PowerSupply can be leiiiifJ. Alji.>. ijie poti-ntia! storedm the large c^acitors is dangerouB, Allow timefor tbCBQ capacitors ifiecharge through ttaa
bleeder reslators before working on the PowerSupply. The capacitors can be dischArged moreqf^Hj by shortlog the ei^ftcaor' fa^ tta
ehftwls ndth a acrewdrtver blade. In a situa-tion where electrical shock is a possibility,stand on some dry insulating material and workWith one hand behiud your bac^ Never attemptto do any work on the Power Supply with theline cord camected to ajiAG aOiet,
Gonneclions yl the free end of the fl-eonductorpower supply cable will depend on the require-ments of^e equipment to be powered. With thecable wiretl ae directed in this Manual, the no-load voltages shown in Table 1 will be availablect the free end of the cable. It is recommendedthat a connector which attaches to the powrr inputsocket on your equipment, be permanently in-
taHvd on the £cee'AF»a of tiiia cable. Connectors
and ctmnection Instructu^ are oLq^pUed withHeath products designed for use wtttttftds PowerSupply.
Cable ^B^r«
Color
*Grean ' 1 30 ^-DC or- *-4Q'to "80 VDC^t .X mA>
Black Filament common.Orange t275 VDC or +350 VOC.Yellow +82D VDC,
*Hed 6 VAC or la v^.White Ground wire.*Brown AC awUch In Moment.*Blt«
"The voltage or function riv^llablc at theaecLible wires depends upon how the plug at theother end of the ^tras vlred M .^ BUj^pB
on Pa^e 12,
TA6LE 1
( } QGKmet tbe power caJaU from' tiK
Su^y to TOUT e<Bjipineiit.
( J CfflmeCt the line corCl plug to electrical
outlet Bupplyxng the voltage for "whlidi th©
Power Supply waa wired (120 VAdtrr 24&
VAC),
( ) Select the desired low &f voltage fay moving
the AC OFF switch tothe ri^hl Tor ^50 VDC,
or to the left for 273 VDC, 11 your eguipment
doea not have prbvlstoftfl for remote control
of the Power Supply, this wSll turn the Power
Supply ON, (Plate and filament voltages are
always turned on and off almultaiKous^
( ) H your equipment bafiprovlatanafar remote
ContrcA of the Powev ^4Sd7t tonillie equip-
ment flft-on switch mw''
{ ) If you axe uaing the acUufltjU^Le bU^, adjust
the blaa voltage afl neceHaxj ttiOl.tMtm^ADJUST aoBtrdU
{ ) 'the PoTTCir Siqjply may be turned off tjy the
AC OFF switch on th<^ chassis, or by the off"
on awitch on your equipmeut, pcuvldedthflt
It vas Tired fCO' rWOte COOtn^
IN CASE OF
This septlon of the Manual la :fivllted into two
pe^. The first part, tiUed General Trouble-
booting Information, describes ^*ftat todoabfftit
any dtlficultics that may occur Vi^bA after the
Power Supply is asaembled.
The second part, a Troubleshooting Chart, is
provided to asHist in servicing if tte GenerallQ-
formatlon does not clear up the problem, or if
difficulties occur after the Power Si^pplyhas been
in operatlocifor some time. This Chart lists Som«difficulties wMchcgiOd aiise^aodamralpOBsl-
GENERAL TROUBLESHOOTtNG iKFCRMATIOM
1. Hecbeek the ^ttS/t^ Tt^e each lead in col-
ored pencil on the Pictorial as it is checked.
It is frequently helpful to have afriend check
ybttf Vt&rK aomeone who is not familiar with
ttie lailt may notice something Eonaifltently
overlooked by the builder.
About 90% of the kite that are returned to
Heath Company for repair dtt tttrt ftaMtten
properly due topoor connections and solder-
ing. Therefore, many troubles can be elimi-
nated by reheating all connecticais to makesure that they are soldered as described In
the soldering section of the Kit Builders
DIFFICULTY
% Check the values of the parts. Be stLTfl that
tiie pvopr^r part has been wired IntothO cir-
cuit, as shown id the Pictorial diagrams and
as called out in the wiring Uutru^tlPPiB,
4. Check for bits of s.iKk r, wire ends or other
foreipi matter whLCh may be lodged in the
wiring,
5. aXtercareAdchcek8t£ffitrDtibleisstLllnot
loeBte>j, eheck voyage r^fbdlngs a^Ea^iat
thoEi' '-n thiT Schfrnnlif. NOTE: All voltage
readmgs were taken with an 11 megohm ii^nK
A renew of the Circuit DesCT^on. and a
study of theSchematicl4aglW''*lltieUiyau
locate a difficulty In tfea 5o»W Supply,
7, Check fqr top^ hardware 8o especially
careful that taetal c^citm^ mounti^'^nit?
fers lid ifvminal fitrtp mouitlBg. feet are
well grounded.
NOTE: Inanwito^eme case where you are unable
to resolTO* it&fiiCLiliy .: efer to Ihe Service and
Warranty aedmaa of the "Kit Buihlers Guiite"»
andto the "Factory Repair Service" information
on the fold-out SrOm BKge 13 of thia Mirauftl,
Page IS
Troubleshooting Cttart
Completely Im^riLtive. 1, Circuit breaker yptn,2, Switch defective,
3, Pin 9 or 10 ^ power output socket orLdiiicf piug ijptsn vT mcwrrectiy wirea*
4, RenK^te switching dlTGuit aaaocEiatodequipment l^ulty,
H, Power transJOiTner defectlvie.
i« oDori ID power Lrimsiornier wuiaioga,2- ^ort in rectifier or filter circifitCfl.
3. Short in associated equipment.
No high Bt voltage. 1. Diodes Dl, D2, D3 or U4 faulty.
2. 4oBpower ou^t socketorpcmr^eabiaplue; open or incorrectly wired,
;i. P'.v.'ei tfiriiisj'ornier defective.
No low Bt voltage- 1, Diode I35 and/or DS open,2. Filter choke LI open,3, Pin 3 of power ou^ut socket or cable plug
open or Incorrectly wired-4. Swilfh incorrectly wired or faulty,
3, Polarity of diodes or filter c^acltors iaineorrMt.
Mo teas vcfl^^^ 1, Diode.DTc^n.2, Heaistors R7, R& or R9 open,3, Pin 11 or 1 of power output socket or cable
High Bf voltage only hslf
o£ indlCBiad value with noliaad. l&'ir uaili^ Inad
Lot Bt -yf^tego on^ halfof lodkated value.
U Dtqde 135 or DB c^iea.
All voltages only half ofin<UC!ited values.
J, Power translLJrnier priiiiavy wi.reii lor 220VAC whm £ower diwtriausedoa 120VAG.
SPECIFICATIONS
HIGH VOLTAGE SUPPLY
GftttpUt VoUage
Effective Output Capacitance. . . . * •
RippE^. - . , . . .«
Duty Cycle.
LOW yOLTAGE SUPPLY (high t<p\
OiOtfltfmXa^ * * . .
HippieDUtjr G^dB . .
LOW VOLTAGE SUPPLY [low X(^>)
Output Voltage •*
Ripple. <«DiAy CTclfi
^Cff OUTPUT VOLTAtiES
Hxed Bias
Adjuatatile Bias,
Filaments.
GENERAL
'^(yw6V Requirements. • « . »
.
£UmenalDQs
Nel Weight
820 ¥olta DC, no load, - ——^-^760 volts DG at 350 mA.
Less than 1% at 250 mA.Continuous to 150 mA.50% At 300 mA,
350 volts DC, no load,
300 volts DC at 150 tnA (wtiJl 100 mA load on
LcBB than ,09% at IGO mA,CtmtiDUbufi up to 17E mA.
275 volts DC, naii>ad,
ZBO TCdi^ DC, atlOO inAfff^lOOBiAlt^oaVoitaiff}.
£e#B&wx.05%atlfiO niA.
-130 volts DC, no Load.
-100 yc^S DC, at 20 mA.
-80 to -40 volts DC, at 1 mA maxlauim.
6,3 volts AC at 1 1 amperes.12,6 volts AC at 5,5 amperes.
120/2^ AC, waits maximum,
B" long X 4-3/4" W1& X 6-3/4"
1^ Ph.
The Heath Conipany reB«rm^aS^J»6to«&-tlnue instruments and to diaiiee J^^e^it^timasjat
any time irtthout incurring aAj obligaticai toCorporate new featu^S in Instrumeats pre-idously sold.
Page 17
CIRCUrr DESCRIPTIONTo better underaland the cirt'ult operation, referto tht Sctiematic Diagram while re^d^ tilft
following description. Eacb aectton of tbaX^FlllQt
PRJMARX CIRCUIT
The AC .Cff? Switch, circuit breaker, ttaas-iorn^^e^xa^, and two terminals ofthepoiPCtrOT^IH^ flo^ftet kte wired in series acroitfi theAC line. The Power Supply may be conlrolledbyits AC OFF switch, or by the off-on switch inthe oqulpinent being uaed with it. The dual pri-mary winding may be connected In series for240 VAC line operation, or in parallelfor UBfl ona 120 VAC line.
HIGH VOLTAGE SECONDARY CIRCUIT
The higli voltage winding applies ^proximately2«2 veiU Ad Wi*5) to a full-^awe voltage doub-let roctifyinn clrcuii oonsSsUna of silicon diodesDl, D2, D3 and D4. and capacitors Cl and C2,Tliefle diodes are connected ao that during one-fulf cycle, capacitor C2 btcoraes rh-irEPr1: andduring the nexthalf cycle capacitor Cl charged,K^^tore H1,R£. R3. and R4 are connected In theCircuit to provide a discharge path fur 0 3pari1r,r.g
Cl and C2, The capacitors are cli.ir^td individu-ally, but discharge in series loprodu£.'(.' ii DC volt-age equal foapproximatelytwice the applied peakAC voltage. Excellent dynamic ret^ulatlon Is pro-vided by )ht hii'ec taparitance values of Cl andC2, The output the voltage doublerc;lrci|lt has a1q# ripple conttirt'j»Hl no further dfe^ac£*r^Quflred,
LOW VOLTAGE COKUIT
The low voltage wvnding is tapped so that either95 or 12B volte AC (RMS) may be a^lllW] to aMJ-'Wave TOltage-^uhler rectifying circuitGOiiaiiStlng of diodes D5 and DG, and capacitorsC3 and C4. Capacitor C4 is also used withChoke LI aOA e^iacltor C5 in a pi filter, C4heins ^e Input c^w^ltor In tfae filter network.ThP use of a hlgh-ciyjacttanee inpui |]i filter
network provides a well Uttered DC outputttutt has a very low perceataEB of r^le.
BIAS VOLTAGE CIRCUIT
lUe bias voltage is obtaliiea ft^m the lowtap onChe low voltage winriini;. About 95 volts AC (RMS)ifi applied to half-wave rectilier diode D7,GaiWUiitors CS and C7, with rttelBtor UT^ppG^vide a filter network to remove the ripplefrom the bias voltage. Either -130 volta offixedbias or from -40 to -BO volts of adjustable biasjnay be Udoit??; connecting to the appropriatepinof (hepower outpntsoeket.The adjustable bias isset by the Bias Adjusr control RO. Resistors R8nod HIO are used Co limit the range of the Bias
FlLAMEh4T VOLTAGE CIRCUIT
The 12,6 vo[t filament windlni- is center tapper!
so that either 6,3 or 12.6 volts AC can be ob-talnetl.
CHASSIS PHOTOGRAPH
REPLACEMENT PARTS PRICE LIST
To order iiarts. *lB«:ai0 Parts Order Form fur-nished wxUi xhla It^'^^oJtts OrCLec Fprm oot
available, refer^ ft^&Q^Mnii^l^lnttuIatBimdera Guide.
tiw fdUowiup prices apply only on purchflaea
from (he Heath Company where shipment is to a
U.S.A, destination. Add 10% (mlnUnum 26centa)to Gie price VftWtB ordering from an authorizedService Center or Heathklt Elcctromr^ Center to
cover local sales tax, postage and handling. Out-
aide the U,S,A, parts and service are available
from vour local Heathkit source and will reflect
additional transportation, tastes , duties andrates
PART PRICE ttEscmpmmMq^ Each
RE5I5TOR5
1-9-1
1-15-2
1-24-2
.10
-15
-IB
25-1925-3625-34
,S5
U052*25
10 kil 1 watt
1 k^2 watt
100 2 vait
20 wF etectroiytic
40 yF electrolytic
125 jjF tat>-mouilt
electrolytic
HARDWARE
#6 Hanhnrs350-fl ,05
250-69 .05262-3 Mm-i M
#6 X 3/8'^ sheet metal screw6-^2 x3/e" screw
PARTNo, Eack
#S Hardware250-137 .05
252-4 ,05
254-2 .05
259-2 ,05
MISCELUkKOUS
10^57 ,3557-27431-40431-55 .10
481-1 M«l-3 40
438-29 .45
440-1 ,20
434-113 .40
435-1 .1061-12 1,7065-lT .8573-1 .10
73-4 .10
ts,4o46-23 s.oo200-505 i.ao205-163-1 ^100-533-1 1,35261-6 ,10
347-1
e
,l5/ft
34Brl ,05/ft
3e-ifl ,55490-5 .10
331-6 .152,00
3-32 I 3/8" screw8-33 nut
#fl locfewagher
#8 solder lug
iO ki2 tab-mount oontrotSOicoQ diode4-lug terminal etr!p
G-lug terminal atrip
MeCo! c^acitor mountingwaferJ^taanoUe Captcltor mounting
Plug cap11-pin socketSocket mounting ringDPDT toggle switchCircuit breaker3/8" grommel5/18" grommetPower tru»tum«t-FUter ctMske
Chassis
Cabinet shell
Rubber foot
8-wire cableBlack sleevingLine cor<]
Nut starter
SQlder
part raiinber.)
UAOE Vim Ui li iwaoHH
VaLIV£TEII.
aCHEMATrc OF TH£HEATHRIT -
AC POWER SUPPLY
MOOEL HP-Z3A
UA-t
