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Wiring For Comspec's SS-64 CTCSS encoder board


1. Locate a row of 9 eyelets on the right front section of the main pcb. These eyelets are labeled as follows:
AF I/P; AF O/P, GA, SQ, 8V O/P, PTT, GND, MOD I/P, MOD O/P

2. Wire as below:

SS-64 CTCSS Encoder Connection points on the radio
+ Voltage (Red) (Pin 1) Collector of Q49 (TX+)
(This will allow the SS-64 to start encoding in less than 10ms)
Ground (Blk) (Pin 2) Gnd Eyelet
CTCSS Output (Yellow) (Pin 3) Base Of Q28 With A 100 K Ohm Resistor In Series

Link to Board Layout (RCI 5054DX)

Note: set the deviation level of the CTCSS output to 750hz

*If reverse phase burst is desired, perform the following steps:

A. Locate J10 on the main pcb.
B. Cut the purple wire labeled PT, insert the PTT input and PTT output on the SS-64 in series with the purple wire (the SS-64 will now control the transmit PTT line).
C. + Voltage: connect to 8V O/P eyelet (do not connect to TX+).
D. On SS-64: install jumpers on JP1 & JP2.


Note:
For optional hookups and programming information for SS-64, please refer to manufacturer's instructions sheet.

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