This is admittedly off-topic, but if any expertise exists I figure it
will be among the denizens of this list.
I have a Kenwood TS-930S with the Piexx enhanced microprocessor board
installed. That board uses a small, on-board switching power supply. The
board works flawlessly, as does the rig. The problem is that the
transformer, which uses a two-piece ferrite core, "sings" at a frequency
that I can't hear, but that my kids can and find annoying. Chris at
Piexx said to squeeze the transformer a bit and, in messing with it,
I'll probably silence it. Indeed, I managed to do so and in the process
found several situations where even I could hear it and it was
surprisingly loud , but the problem has returned. Chris is sending me a
metal clip that is now used on the transformer in hopes that it will
permanently solve the problem.
If the clip doesn't do the trick, can I get away with getting the
transformer silent and then applying Q-Dope or some thinned epoxy to
hold it in whatever position keeps it quiet (sort of a half-baked
potting process)? Or will that, instead, guarantee that I'll never be
able to fix it if the ferrite halves shift a tiny bit as everything sets up?
Kim N5OP
--
Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)
/"In theory there is no difference between theory and practice. But, in
practice, there is." //-- Attributed to many people; it's so true that
it doesn't matter who said it./
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