Compatibility of David Clark & Flightcom

[Okavango]

I've got a personal set of David Clark's but bought a cheap pair of Flightcom's for passengers on Ebay. I thought the mic wasn't working on the Flightcom set as passengers couldn't talk to me (but could hear me). When I tried the Flightcom set the radio check was fine. Is it just that the two sets aren't compatible?

[A and C]

It's not the headsets that are the problem................. it is the third rate intercom in the aircraft.

[martinprice]

Did you experiment with the squelch setting on the intercom? That's fixed about 90% of similar issues I've had. Failing that it could be a dodgy electrical connection somewhere between the passenger headset jacks and the intercom but I'd experiment with squelch first.

[Whopity]

Some Intercom systems (typically old PA28s) wire the Mics in parallel, if they are of a different impedance i.e. different type of mic, quite often one stops the other working. The easy way around it is to get a portable intercom box which isolates the mics.