On Mon, 06 Nov 2006 02:26:25 GMT, USER wrote:

RST Engineering wrote:
My best guess is that the "cloners" didn't take into account RF pickup by
the headset leads and you are getting RF into the mic circuit, which
rectifies in the first transistor junction it comes to, becomes an audio
signal, feeds itself into the transmitter modulator, gets on the output,
feeds itself into the headset leads, and round and round we go.

Jim

thanks jim. it hasnt been evident for 6 years. I wonder why it clears
after some flying time. hmmm.....whats about to fail....



"Stealth Pilot" wrote in message
...
radio is an icom a200
headset is a clone of a dave clark


Ahh Jim You are correct... a lot of problems with Altronic headsets due
shielding etc.... Some of our customers have fitted ferrite beads on
the headset line and that seems to work well.
Australian or otherwise, they are NOT a David Clarke !! and fall well
short as a clone.

Regards Michael @ XCOM

interesting comments. they have been in use in the aircraft for 6
years without problem up until recently so i suspect that your
comments are not quite correct.
a friend and I have flown in his thorp and swapped the dave clarks and
the altronics for 15 minutes about. neither of us could tell the
difference. we dont believe that they fall short as a clone.

the latest dave clarks at $aus1,350 or so a headset are more expensive
than gold for the weight if my calc was correct.

Stealth Pilot