LAB599 Discovery TX-500 radio to DIY PA-500 amplifier keying cable

This is for keying your DIY PA-500 amplifier from your LAB599 Discovery TX-500 radio. Cable from your LAB599 Discovery TX-500 radio (REM/DATA 7 pin connector) connect to your DIY PA-500 (CAT/CNTRL 6 pin connector) amplifier for KEYING the amplifier.

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