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I just completed installing the Rich Measures QSK circuit in one of my
SB-220s and it works great. Clackity-clack absolutely gone, noise and relay
delay no longer perceptible. Really fast, smooth VOX. VOX delay set now to
minimum.
Every measurement in testing is exactly as in the Measures circuit diagram.
I am now going to modify another SB-220 with this circuit. There is plenty
of room for a circuit board for this entire circuit after the clackity clack
is removed. Has anybody ever produced such?
And to Rich - The silicone adhesive really stops or greatly dampens the
noise. I believe the thick silicone insulation on HV test lead wire (26KV
type) will dampen the relay noise and would be an acceptable alternative to
the tedious copper foil fabrication and soldering for two of the
connections. Perhaps slitting and removing the insulation from a length of
HV test lead and applying it to the heavy wire to the HV RF section with a
dab or so of silicone will dampen the noise also.
Great project fun.
Bob, N5CNN
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