[Elecraft] K3 Overload from WYFR
dj7mgq at muenchen-mail.de
dj7mgq at muenchen-mail.de
Mon Jun 15 07:08:46 EDT 2009
> Further to Joe's suggestion: I've heard of a strong local signal being
> rectified in rusty guttering giving problems to a beam in just one
> direction. Took years to find that one.
Reminds me of something which happened many years ago here in Southern
Germany.
The interference monitoring and abatement service (at the time they
were part of the German Post Office) received several complaints about
TVI. The nearest ham was about 2km distant and when they checked his
transmitter, the signal was clean. When they measured at the TV
receiver there was a large harmonic on the same frequency as one of
the TV stations.
It turned out that one of the ham's neighbours had a narrow band, high
gain television reception Yagi pointing towards the 2km distant TV. It
turned out that there was some oxidation at the feed point of the
Yagi, which acted as a diode.
As you can imagine, this is the very short version of this true story.
vy 73 de toby, DD5FZ
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