ZETRON 37-MAX - Connection to a GE Custom MVP

Section 5. Installation
5-10
Connection to a GE Custom MVP
For: Zetron Model 37-MAX
To: GE Custom MVP
Using: 709-7179 Generic Radio Cable
37-MAX End
Function
J1
pin#
Wire
Color
Radio End
Connection/Notes
+12 volts DC 1 RED Inside front panel, S701 (switch side)
Ground 2 BLACK Chassis ground
Discriminator Input 3 WHITE IF detector board, junction of R606,
R608, C622
Ground 4 BRAID No connection
TX Audio Output 5 BLUE Exciter board, P902, pin 4 (Mic Hi)
Ground (spare) 6 N/C
PTT Output 7 ORANGE System Audio Squelch board, J911
(PTT)
Ground 8 BROWN Exciter board, P902, pin 5 (Mic Lo)
COR Input 9 YELLOW System audio squelch, J912 (CAS)
CTCSS/DCS Encode 10 GREEN Exciter board, P902, pin 9 (CG Hi)
GE MVP Configuration
Follow these steps:
1. Cut the circuit trace on top of the System Audio Squelch board which runs from U902 pin
6 toward R11. Cut the trace close to U902. This disables the receiver muting on PTT.
2. Install a jumper between J904 pin 2 (RX OSC Control) and J904 pin 1 (10 volt regulator)
on the System Audio Squelch board (SAS board). This provides a source of switched 10
volt to the receiver oscillator at all times.