In article ,
says...
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?

What did Cambridge tell you about the problem?

Is the vario connected to anything besides power, the GPS antenna, the
temperature probe, and the 303 display?

Does the cable to the 303 have the ferrite cores on it?
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Eric Greenwell
Richland, WA (USA)