Steve Nosko wrote:

I believe there was an article in QST within the last three months
describing the aircraft interface. It needs power for the mic. The
interface hasn't changes for a long time and you can still use a carbon
mic., so it provides a fairly high level output.
--
Steve N, K,9;d, c. i My email has no u's.

"Wolfgang K. Meister" wrote in message
...
Hi to all,

Someone offered for an reasonable price an Aviation Headphone / Mic
(Avcomm). Noise canceling for the headphones by beeing very closed
earcups and something like a 'noise reduction chip' in the Mic.

Are those devices useable for Ham Radio?

Anyone ever tried this with an ICOM or Yeasu tranceiver?

Any comment is welcome!

73
Wolfgang
OE1MWW

It won't work without an adapter.

The microphone (it is an active device) needs power supply.
The industry standard is a 12V power supply thru a 470 ohm
resistor to the 'hot' lead of the microphone. The audio
is AC coupled from the 'hot' lead. The output level is
usually adjustable from about .25Vrms to about 2.5Vrms.
The AC output impedance is very low - probably a few tens
of ohms.

Bob.