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Polytone PA378B

IN
BLK WHT




B C EE C B
C6 + R4
R7 C3 C4



Q1
R6




R3
C B E

Q2
R9 C2 +




C7
R1
C5
C1 R2 R12 R5
RED
E




R10




R14
R15




R8
D6




GRN
B




E B C
Q3
D3




C8
-

C10
+
R11

ORG
+ C9
C




D1




R13
D2
Q5
R17
PNP


C B E
R18



D4
Q4
+ OUT ORG




C
Q1 = PT 1583 RED
replaced by 2 x 2N5210
R19




GRN

D7
B
Q2, Q4 = NSDU57 = MPSU57
~ - BLU
C.T.
E
R16


replaced by MJE 172 BLU CR1
Q6
+ ~
C12




NPN
Q3 = NSDU07 = MPSU07
replaced by MJE 182
-
C11




Q5 = MJ 4502 +
Q6 = MJ 802 - OUT
R23 R22 BLU
D1 - D7 = 1N4004
R20
POLYTONE ENOTYLOP
PA378B
R21 B873AP