Stuart has a very good point. I have been bitten, and am a former
unbeliever. The antenna switch or even antenna contacts can do this.
Similarly, a really big loop with no isolation on the outside of a coax
feed can bring in tremendous AM BC signals to the rig. I had a LOT of
BC problems and cured them by removing my antenna switch and going
direct to the line. I found I could also reduce the problems by a good
line isolator on the coax feed. Interesting stuff.
Clark
WA3JPG
On Monday, March 24, 2003, at 06:38 PM, Stuart Rohre wrote:
Make sure your band switch contacts are clean and not acting as diode
detectors!
If cleaning does not fix it, (Is there an alternate antenna switch)?
then,
put a BC tuned series coil and cap trap in the antenna lead to
ground. A
variable cap allows any AM station to be nulled.
73, Stuart K5KVH
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