[50mhz] Birdie on .125

Ray Brown raybrown at ipa.net
Sat Jul 16 23:16:00 EDT 2005


----- Original Message ----- 
From: "John Geiger (NE0P)" <ne0p at lcisp.com>


> Recently a kind of nasty birdie has shown up on 50.125, which makes listening to the calling frequency frustrating.  The Autonotch
and beat cancel on the TS2000 will handle it pretty well, but still not as well as if it wasn't there.  I have tried turning
off/unplugging several things in the home (computers, VCR, DVD players) with no luck so far.  One ham had a problem with his
internet router, so I tried unplugging that also, along with the cable modem.  No luck there.  Has anyone on the list have this
problem before, and if so, what was the final cause of it?  It peaks about S3 from the NE direction, and will get weaker when I move
the miniquad to the direct south or NW.  That suggests that it could be outside the house, and might go drive around the
neighborhood a little this weekend to try and localize it, but would like to eliminate things in the house first.

  Sorry for the late reply, I was out of town for the past 10 days on business...
We had a local discussion about this with a local 6m Elmer, and he thinks that
the problem is the 14th harmonic of the 3.579 MHz color burst crystal.
It's awfully close.  About the only way to find out would be to get up about
0500 your time and listen then, and if your birdie is gone, there's your proof...

                _Ray_        KBØSTN





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