[Johnson] Valiant Chirp - update

Chris Kepus ckepus at comcast.net
Sat Jan 3 13:16:40 EST 2009


Again, thanks to everyone who contributed ideas re my chirp problem.  A
special thanks to Al, W8UT, whose Valiant problems and fixes message archive
immediately became one of the hottest request items on the lists! :-)

The info in that archive and Al's message pointed out that the chirp is
likely being caused by RF feedback from the amp into the VFO, especially on
40 M.   I managed to get an hour or so last night to play so I loaded up on
80M CW.  Wow!  It was like a different rig.  Had some real nice QSO's and NO
chirp reports!   My monitor receiver also confirmed a nice T-9 signal.  It
appears that RF feedback is the villain. 

My next task will be to fashion a grounding method for the tuning shaft by
copying Al's method.  I'll report back then.  I receive my Johnson list
messages in digest form so there may be some delay in my responses to
comments.  Please reply direct to me for a faster response.

73,

Chris

W7JPG

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