Solved same problem with 302/303 and Dittel FSG70M by rerouting the cable
from 302 to 303 (display). Turn everything on, squelch off and get teh
noise. Then start unplugging cables-start with the 302 to 303 cable. As soon
as the noise quits, you have found it!
Good luck!
--
Hartley Falbaum
ASW27B "KF" USA

"Chris Davison" wrote in message
...
A problem with interference, all advice welcome.

.radio by itself works fine...but when I turn the
vario on I get huge amounts of noise (even some with
Squelch ON). Radio is a Dittel FSG50, vario is Cambridge
302/303.

Where do I start looking?

Chris