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FET/RACK A Limiter

Main PCB Overlay, Schematic and Bill of Materials

(To CN3)

CN12

R71

CN2

CN4

CN5

(To VU)

+

+

C

EB

C

EB

C

EB

C

EB

EC

B E

C

B E

C

B

GSD

D

S

G B

B

C C

E

E

NormalOperation

-10V

+30V

Null Adj

Q Bias

Trac

king

Adj

SIGNAL PREAMP SIGNAL LINE AMP GR CONTROL AMP

GR METER DRIVER AMP

S

GD

DG

R23

R56

+ +K

+ +

RCA1

Power Transformer

(To CN9)

(To

CN2)

(To

CN6)

(To CN7)

(To CN8)

R21

R61

R4R5

R7R10 R6

R8

C1

C6

C3

C2

Q3

R9

R13

R17

R14

R11

R12

C4

C5

R15

C7

R1C

T1

C8

R22

R20

R19

R78

R62

R63

R64

R_OPT

R58

R65

R79

R66

R72

R76

R70

R73

Q7

Q8

Q9

Q10

R36

R37R38 R39

R40R41

R42

R43

R46

R47

R51

R48

R49

R50

R52 R53

C17

C18

C19 C20

C21

CR2

CR3

R54

R57

R59

R60

C22

C27

Q5

R25R24

R26

C10

R27

R30

CR1

R29

C11

R35

R31

C13

C14

C12

T2

R32

R28

R33 C15

Q12 Q13

R44

R68

R69

R75

R74

R67

CR9C26 C25

R82 R81

R55

SW1

10 11

XLR1

SW2

R77

R18

CR8

C24 C23

R80

CR4

CR5

CR6

CR7

XLR2

CN10

CN3

CN6

CN7

CN8

CN9

CN11

C7ALT

C10ALT

Q6

19

18

21

22

1517

7

IN+

IN-

OU

T+

OU

T-

TP1

C25_ALTC26_ALT

C24_ALT C23_ALT

R16

C9

R34

C16

R83

R45

CN1

CN17

RLY

1

CR10

Q1

Q2

Q4 Q11

PbLEAD FREE

CONTENTS

TO METER

Output

"0" Adjust

Tracking Adj

Null Adjust

GR Off

Power Off

Input

Attack

Release

"Q" Bias

To PowerTransformer

To VoltageSelector/LineVoltage

To PowerTransformer

Shunt P2, P3for NormalOperation

GR

GR

+4

+4

+8

+8

In

Out

(On attack pot)

56k 470R

270R

27k

2.2M

2.2M

2.2M

10k

0.15

uF

6.8pF

6.8uF

0.15uF

2N3391A3.9M

47k

4.7k

22k

9.1k

2.2k

100uF

100uF20k

1uF

250k

0.15uF

47k

56k 68k 47k 470R 1.5k 2.2k

10M120

3.9M

15k

10k

1.5k

2k

18k

4.7k

680

2N3707

2N37072N3707

2N37071M

470k

47k

4.7k

2.4k

270R

180k

47k

47k

47k

4.7k

8.2k 2.4k

180R

47k

47k

1uF

47uF

6.8uF

6.8uF

100uF

FDH333

FDH333

1.2k

5M

270k

2k

680

.22uF

0.012uF

2N3707

3.3M

15M

33k

1uF

12k

150k

1N91

4

1.2M

10pF

8.2k

3.3k0.001uF

0.033uF

100uF 39R560

560R.0047uF

2N3707 2N3707

2k

820 820

2k

1k

3.9k

1N47

40

2200uF 2200uF

1k 1k

25k

8.2k

3.6k

1N29

89B

2200uF 2200uF

75 3W1N400X

1N400X

1N400X

1N400X

V+

V+

AGND

GND

GND

GND

AGND

2N3053

AGND

2200uF2200uF

2200uF 2200uF

AGND

AGND

100k

6.8uF

8.2k

33pF

560

270k

1N4148

AGND

V+

Stereo Link

R21 R61

R4

R5

R7

R10

R6

R8

C1

C6

C3

C2

Q3R9

R13

R17

R14

R11

R12

C4

C5R15

C7R1CG$1

R1CG$2

R1CG$3

T1

R23

C8

R22

R20 R19 R78 R62 R63 R64

R_OPTR58

R65

R79

R66

R72 R71

R76

R70

R73

Q7

Q8

Q9

Q10R36

R37

R38

R39

R40

R41

R42

R43

R46

R47

R51

R48 R49

R50

R52

R53

C17

C18

C19

C20

C21

CR2

CR3

R54

R56

R57

R59

R60

C22

C27

Q5

R25

R24

R26

C10

R27

R30

CR

1

R29

C11

R35

R31 C13

C14

C12

T2

R32R28

R33C15

Q12 Q13

R44

P1P$

1

P2P$

2

P3P$

3

R68 R69

R75

R74

R67

CR

9 C26 C25

R82 R81

R55

R55G$2

SW1G

$1

SW1G

$2

SW1G

$3

SW1G

$4

SW1G

$5

SW1G

$6

SW1G

$7

SW1G

$8

10 11

SW2G$1

SW2G$2

SW2G$3

SW2G$4

SW2G$5

SW2G$6

R77

R18

CR

8 C24 C23

R80 CR4

CR5

CR6

CR7

CN10G$1

CN10G$2

CN10

G$3

CN10G$4

CN10

G$5

CN10

G$6

CN12G$1

CN12

G$2

CN12G$3

CN12G$4

CN12

G$5

CN12

G$6

CN2G

$1

CN2G

$2

CN2G

$3

CN2G

$4

CN2G$5

CN2G$6

CN3G

$1

CN3G

$2

CN3G

$3

CN3G

$4

CN3G$5

CN3G$6

CN4G$1

CN4G$2

CN4G$3CN5G$1

CN5G$2

CN5G$3

CN6G

$1

CN6G

$2

CN7G

$1

CN7G

$2

CN8G$1

CN8G$2

CN8G$3

CN9G$2

CN9G$3

CHASSIS

CN11G$1

CN11G$2

C7ALT

C10ALT

Q6

19

18

21

22

15

17

7

IN+

IN-

OUT+

OUT-

TP1

CHASSIS1

C25_ALTC26_ALT

C24_ALT C23_ALT

R16

C9

R34

C16

R83

R45P1P$1

P2P$2

P3P$3

P4P$4

P5P$5

CN17G$1

CN17G$2

CN17G$3

CN17

G$4

CN17G$5

CN17

G$6

RLY

1G$1

RLY1G$2

CR10

SW2G$7

SW2G$8

L1

Q1

Q2Q4

Q11

CW

CW

CW

CW

CW

CW

CW

CW CW

CW

Date: 26/04/2016 7:13 AM Sheet: 1/1

REV:

TITLE:

Document Number:

FET_RACK_A_v1.12

ANALOG

Quantity Part Value Part Number Description Package Notes

1 C1 0.15uF Capacitor, Film CAP_FILM_5X7.2

2 C2, C8 0.15uF Capacitor, Film CAP_FILM_6X17.5_VAR_PITCH

2 C3, C9 6.8uF Radial Electrolytic Capacitor RAD4/1.5

4 C4, C5, C12, C21 100uF Radial Electrolytic Capacitor RAD8/3.5

1 C6 6.8pF Capacitor, Ceramic CAP1-2

3 C7, C10, C17 1uF Radial Electrolytic Capacitor RAD5/2

2 C7ALT, C10ALT 1uF Capacitor, Film CAP_FILM_6X17.5_VAR_PITCH

1 C11 10pF Capacitor, Ceramic CAP1-2

1 C13 0.001uF Capacitor, Ceramic CAP1-2

1 C14 0.033uF Capacitor, Film CAP2_RECT

1 C15 .0047uF Capacitor, Film CAP2_RECT

1 C16 33pF Capacitor, Ceramic CAP1-2

1 C18 47uF Radial Electrolytic Capacitor RAD6.3/2.5

2 C19, C20 6.8uF Capacitor, Tantalum CAP1_POL

1 C22 .22uF Capacitor, Film CAP2_RECT

1 C23_ALT 2200uF/50V Radial Electrolytic Capacitor

3 C24_ALT, C25_ALT, C26_ALT 2200uF Radial Electrolytic Capacitor RAD16/7.5

1 C23 2200uF/50V Axial Electrolytic Capacitor

3 C24, C25, C26 2200uF Axial Electrolytic Capacitor CAP_AXIAL_18X41

1 C27 0.012uF Capacitor, Film CAP2_RECT Attack/Release PCB

2 CR1, CR10 1N914 Diode DO-35-0.4

2 CR2, CR3 FDH333 Diode, Low Leakage DO-35-0.4

4 CR4, CR5, CR6, CR7 1N4004 Diode DO-41

1 CR8 1N2989B Zener Stud Diode DO4

1 CR9 1N4740 Zener Diode DO-35-0.4

2 Q1, Q11 2N5457 FET N-CHANNEL TO-92_INLINE

2 Q2, Q4 J309 FET N-CHANNEL TO-92

1 Q3 2N3391A Transistor, NPN TO-92

7 Q5, Q7, Q8, Q9, Q10, Q12, Q13 2N3707 Transistor, NPN TO-92

1 Q6 2N3053 Transistor, NPN TO-39

1 R_OPT 10M 1/4 Watt Resistor MF1/4 Ratio PCB

2 R4, R41 270R 1/4 Watt Resistor MF1/4

1 R5 27k 1/4 Watt Resistor MF1/4

3 R6, R7, R10 2.2M 1/4 Watt Resistor MF1/4

2 R8, R66 10k 1/4 Watt Resistor MF1/4

2 R9, R65 3.9M 1/4 Watt Resistor MF1/4

1 R11 9.1k 1/4 Watt Resistor MF1/4

2 R12, R64 2.2k 1/4 Watt Resistor MF1/4 R64 Ratio PCB

9 R13, R22, R38, R43, R46, R47, R52, R53, R78 47k 1/4 Watt Resistor MF1/4 R22, R78 Ratio PCB

1 R14 22k 1/4 Watt Resistor MF1/4

1 R15 20k 1/4 Watt Resistor MF1/4

1 R16 100k 1/4 Watt Resistor MF1/4

4 R17, R39, R51, R70 4.7k 1/4 Watt Resistor MF1/4

1 R18 3.6k 1/4 Watt Resistor MF1/4 Meter PCB

1 R19 68k 1/4 Watt Resistor MF1/4 Ratio PCB

2 R20, R21 56k 1/4 Watt Resistor MF1/4 Ratio PCB

1 R24 15M 1/4 Watt Resistor MF1/4

1 R25 3.3M 1/4 Watt Resistor MF1/4

1 R26 33k 1/4 Watt Resistor MF1/4

1 R27 12k 1/4 Watt Resistor MF1/4

1 R28 560 1/4 Watt Resistor MF1/4

1 R29 1.2M 1/4 Watt Resistor MF1/4

1 R30 150k 1/4 Watt Resistor MF1/4

1 R31 3.3k 1/4 Watt Resistor MF1/4

1 R32 39R 1/4 Watt Resistor MF1/4

1 R33 560R 1/4 Watt Resistor MF1/4

4 R34, R35, R48, R77 8.2k 1/4 Watt Resistor MF1/4 R77 Meter PCB

1 R36 1M 1/4 Watt Resistor MF1/4

1 R37 470k 1/4 Watt Resistor MF1/4

2 R40, R49 2.4k 1/4 Watt Resistor MF1/4

1 R42 180k 1/4 Watt Resistor MF1/4

1 R45 200k 1/4 Watt Resistor MF1/4

1 R50 180R 1/4 Watt Resistor MF1/4

1 R54 1.2k 1/4 Watt Resistor MF1/4 Attack/Release PCB

1 R57 270k 1/4 Watt Resistor MF1/4 Attack/Release PCB

1 R58 120 1/4 Watt Resistor MF1/4 Ratio PCB

2 R60, R73 680 1/4 Watt Resistor MF1/4

2 R61, R62 470R 1/4 Watt Resistor MF1/4 Ratio PCB

2 R63, R72 1.5k 1/4 Watt Resistor MF1/4 R63 Ratio PCB

1 R67 3.9k 1/4 Watt Resistor MF1/4

2 R68, R69 820 1/4 Watt Resistor MF1/4

1 R74 1k 1/4 Watt Resistor MF1/4

1 R76 18k 1/4 Watt Resistor MF1/4

1 R79 15k 1/4 Watt Resistor MF1/4

1 R80 75 3W ERG-3SJ750 Resistor, 3 Watt MF-3W

2 R81, R82 1k Resistor, 1/2 Watt MF1/2

1 R83 560 1/4 Watt Resistor MF1/4

1 R1C 600 T Pad BOURNS_MODEL_51

1 R23 250k Potentiometer, Log Taper P260_1/4"

FET/RACK Rev A Bill of Materials

1 R55 25k Potentiometer w/Switch P260S-D1 Attack/Release PCB

1 R56 5M Potentiometer P260_1/4" Attack/Release PCB

3 R44, R59, R75 2k Trimmer Potentiometer 3386_TOP

1 R71 2k Trimmer Potentiometer 3306

1 RCA1 161-0390-E RCA Snap-Fit RCA-900

1 RLY1 V23105A5305A201 Relay V23105A5305A201

1 SW1 PBN-4 Push Button Switch Bank PBN-4 Ratio PCB

1 SW2 PBN-4-15T Push Button Switch Bank PBN-4-15T Meter PCB

1 T1 C-3837-1 Input Transformer INPUT_TRANSFORMER_1.13

1 T2 EA-5002-500 Audio Output Transformer EA-5002

1 U$1 Header 3PIN_.1_HEADER

1 J1 NC3FAH1 XLR Connector NC3FAH1

1 XLR1 NC3MAH XLR Connector NC3MAH

1 578305B00000G Heat Sink For Q6

1 695-1B Heat Sink For CR8

1 CN1 B5PS-VH Connector B5PS-VH

2 CN10, CN17 S6B-XH-A-1 Connector S6B-XH-A-1

1 CN11 B2B-XH-A Connector B2B-XH-A Meter PCB

1 CN12 06JQ-BT Connector 06JQ-BT Attack/Release PCB

2 CN2, CN3 B6B-PH-K-S Connector B6B-PH-K-S CN2 Ratio PCB

2 CN4, CN5 B3P-VH Connector B3P-VH Meter PCB

2 CN6, CN7 B2B-PH-K-S Connector B2B-PH-K-S CN6 Meter PCB

2 CN8, CN9 B3B-PH-K-S Connector B3B-PH-K-S CN9 Meter PCB