At 23:35 12/5/2009, AB2CD wrote:
ferrites can't substitute for sound engineering practices.
I agree with this Jim, but I think sometimes they are necessary. My
rig has about 25 ferrites
right now, but I think there is only one that matters (I just haven't
tried removing the others yet).
The "last" one I added was on the unbalanced, unshielded lead between
the mic output and the
cable that connected it to the F3K. Actually, I added one at each
end. That killed my problem
dead. My theory is that the RF (which is fairly strong with my 1KW
antenna about 9' from the
cable in question) was getting into the RJ-45 mic input of the F3K
and raising heck inside the F3K case.
How would you "sound engineering practice" your way out of this
problem without modifying the
F3K and voiding the warranty? I considered a shielded cable from
the mic to the back panel where
it could come in thru pins 1&2 of the Flexwire, but I was afraid that
might cripple future use of
the Flexwire. Any comments?
--
Dave Gomberg, San Francisco NE5EE gomberg1 at wcf dot com
All addresses, phones, etc. at http://www.wcf.com/ham/info.html
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