JimT
Joined: 27 Feb 2006
Posts: 22
Location: Auburn, ME
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 Posted: Sun Feb 08, 2009 3:39 pm Post subject: Head sets, iontercoms and Hand helds |
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This seems that it should have an easy answer, but In this area I am a neophyte.
In my 2 seat project, I have a Avcom AC6PA intercom. I was going to run the output of a Nav 122 into a switch on the audio input of the intercom. This should let me monitor this as Nav 1 without an audio panel.
I also have a hand held, the sporty JD200.
What would be the repercussions of wiring the hand held as one of the passenger head sets. The real goal is being able to hear over the intercom. The hand held speaker port expecting to see a 150 ohm head set, but would instead see the 5 volt bias for the microphone. Would this work at all , or over/under drive the intercom. I am afraid I don't know what amplitude of signal is expected or supplied. Going in the other direction would be a similar mismatch. The hand transmitter would be seldom used , in my plan, so driving that via the intercom would be less important, and I would expect to use the integral PTT.
So would this work, or would I make expensive smoke?
JimT
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