My old IC730 is giving me some problems with the TX audio. It used to
be fine, but I started getting poor audio reports. I checked my signal
with another reciever and my audio is quite distorted. I've posted a
sample at http://www.zshare.net/audio/696470222a13632b/ .
I've tried several mics and I'm pretty sure I'm not overdriving it.
Someone suggested it might be RF feedback, but it still happens when
using a dummy load and ferrites on the mic lead. I'm armed an
oscilloscope and circuit diagrams, but if ayone could give any
pointers on what I might look for I'd be very grateful.


Cheers
Tom 2E0WNT