On Thu, 14 Feb 2008 19:16:09 -0700, Mark Hickey wrote:

Jay Maynard wrote:

snip
If this doesn't help it's likely that the mixing is occurring
somewhere else. If it's outside the aircraft, there's not a lot you
can do (though that would mean that almost everyone would have the
problem). If the mixing is happening in the aircraft, it'll be "more
fun" to find.

snip
Mark Hickey

Also you might try putting a 20-30 db attenuator on your radio connector.
If the signal remains then probably originating (ie mixing products)
outside the radio. If the interference goes away it is most liking
occuring inside the radio.
John