Thanks for the info about the Heil Sound adapter selector. Looks great. Not sure how all this works, but looks like you plug it all together in this order:
(for mic) headset; AD-1Y; AD-100; mic jack on radio
PTT device; AD-1Y
(for speaker) headset; external speaker jack on radio
Is that right? Then I need to buy a PTT device (thought it would be with the headset, but I guess not). The cost sure adds up when you need so many pieces. I think a hand held PTT would be good. Any suggestions?
The headsets are pricey. They list traveler, which sounds small/inexpensive, but looks like it's no longer made. Heil sells a headset for an HT, but it's not on the list, so guess that won't work.
The diagram they use to show how to plug it all together says to plug the headset into the "headphone output". But for my radio, it's designated for an external speaker. Will it work? I was told any external speaker must have the right impedance, so don't know if that would work. But if Heil says it'll work, guess they know what they're talking about.
In my radio manual, it says: AF output impedance = 4 - 16 ohms. Is that for the external speaker? It doesn't really say.
Looks like I'm well on my way to getting all the info I need. Thanks so much.