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All,

I had an interference problem (doesn't sound like Don's however) which had a
non-intuitive solution. My faithful old Skylane always broke the squelch
when near TV and FM towers and the closer I got to the towers the more
garbled the received signal became. The problem was on both the KX175B and
the KX155. I rescreened all leads that had screens, played with the
grounding of the intercom and radios, nothing helped. On a trip to PDX I
almost lost communications entirely, so in desperation I started asking
around. One bright spark said "It's your ELT! It picks up radiated signals
distorts them (intermodualtion distortion) and reradiates enough energy
across the aviation VHF band to screw you up entirely!" "Balderdash!"
thought I but I was desperate. I disconnected the ELT from it's antenna and
took the plane to a convenient FM tower (couldn't fly it without an ELT, so
I drove it), dead quiet. I thought the radio had died, but all was working
perfectly. Apparently this is a well know problem with old SHARC ELTs. New
ELT all is now well.

Hope this helps others if not Don.

Pat
"Only three short years to go!"
http://www.teleport.com/~peweston


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