Beacon:
This keys the rig for a few seconds every minute. Useful for testing without transmitting too much.
Cross-band Repeater:
This is for connecting 2 handhelds where the PTT and microphone are on the same wire.
Both rigs must have some output which goes high when the squelch opens. I connected the squelch control to the positive battery terminal through a diode so the battery could be removed and a wire clipped on.
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