PREAMPLIFIER CIRCUIT DIAGRAM
PREAMPLIFIER PC BOARD
FIGURE 6
FIGURE 7
REPLACEMENT PARTS LIST
Reference
Part
Designation
Number
A l
90A8216
A2
R134
C102, 107, 108, 110
86S628R
C103
86AE629
C106
86W628R
D101, 102, 103, 105, 106
86A415R
D104
86A8405
D107
86C429
L1, L2
80A253
MP2
RK245
MP3
49A66
P1
95A8077
P2
95A247
Q101, 105
86A350
Q102, 103, 104
86A348
S101, 102
55A8031
T1
51A286
W1
C107
Description
Printed Circuit Board Assembly
Microphone Cartridge-Housing
Capacitor, Electrolytic, 1 µF, 50 Wvdc
Capacitor, Electrolytic, 33 µF, 16 Wvdc
Capacitor, Electrolytic, 15 µF, 63 Wvdc
Diode, Computer, 75V, 0.4A
LED, Green
Diode, Current Regulator, 1.3 mA
Ferrite Bead Ring
Swivel Adapter
Windscreen
Connector, Receptacle, 3-pin Miniature
Connector, Receptacle, 3-pin
Transistor, NPN
Transistor, PNP
Slide Switch, SPDT
Transformer
Cable and Connector Assembly
Commercial
Alternate
None
None
None
Mallory VTL33S25
None
TI, GE 1N4148
None
Motorola, Teledyne
1N5300
Stackpole 57-0180
None
None
Switchcraft TB3M
Switchcraft D3M
Motorola, National
Semiconductor 2N5210
Motorola, National
Semiconductor 2N5087
None
None
None
