>
> There is a 3 pin cord on the PA on the back of the radio, do you know 
> what this was for?  And does it need to be reconnected.  Thanks.
>  
> Mathew


That sounds like the antenna relay control line.  Yes - it needs to be 
connected to the amp and should be connected to the large board on the 
bottom of the radio.  It will be switching the antenna to the 
transmitter any time the radio is keyed.  You can move a wire in the 
connector back at the large board (the system audio/squelch board) and 
keep the relay keyed all the time.  If this is done, you don't have to 
use the Darlington arrangement for the PTT operation.  A simple 
transistor switch is all that is required.

Keep me posted on your progress -

73 - Jim  W5ZIT





 
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