Could anyone in the group advise on the pin-out wiring for the main handset
to the Seavoice RT660 vhf radio? It's a telephone type handset with mike,
earpiece and PTT combined.

6 wires (2 red on PTT, 2 black on mouthpiece/mic and 2 white to the
earpiece/phone speaker) Could be simple, but the 6 wires run to a 5 pin
plug, so at least 1 pair will be commoned, I presume. Trial and error could
run it down, but I may fry the rig in that process.

Any help on which colours to connect to which pins on the plug would be
greatly appreciated. Also any advice on how best to solder this lot as the
pins are tiny, the multicore wires are very thin and the insulating sleeves
melt with the soldering iron a meter away!

Constructive comments/help greatly appreciated please....Keith