On 12/05/2021 18:45, Moshe Braner wrote:
Does anybody know how to connect headphones (listen-only) to an Icom A5
handheld radio?Â* It has a 3.5mm (1/8") jack, but the official thing to
plug in there is an adapter for aviation headsets (including mic & PTT),
and the plug of that adapter has 4 wires (tip & sleeve and 2 rings,
looks like an iPhone connector).Â* Can I plug headphones into it, without
bypassing the internal mic & PTT?Â* I'd build the needed adapter if
necessary, but need to know the wiring diagram.Â* But if the physical
presence of the plug in that socket disconnects the internal mic & PTT
then the answer would be "no".

I don't have the wiring for A5, but as it is a combined mic/speaker plug
the probability is that the presence of plug will disconnect internal
microphone. Other models have separate sockets for microphone and
speaker and therefore what you want is then possible.