A while back, I had a problem where sometimes my K3 would shut down and
immediately power back on when I would attempt to touch the main vfo knob. I
had installed the encoder properly by inserting a star type of washer on both
sides of the front panel to provide a good ground. However, I suspected that it
was likely a poor ground of the VFO A encoder but I didn't really want to
remove the front panel from the rig (to do the ground on the back side of the
front panel) as I had quite a time to install the front panel on there to start
with. So, I removed the PTO A knob, nut and washers and carefully removed just
enough paint around the hole where the encoder was mounted so that the star
type of washer would bite into bare metal to ascertain that I had a good ground
but being very careful as to not scratch the front panel so it would be good
idea to use a bit of masking tape just in case one slips.
Now, I haven't a problem since so I suspect that this is what the problem
was with a poor or none existent ground to the A PTO encoder. Jus thought that
I'd pass this one just in case somebody else experiences the same problem. Now
what I would do if putting a new K3 together is to remove enough paint on the
back side of the front panel around the holes of both the A PTO and B PTO
encoders (I never did have the problem when touch the B encoder).
Cheers from Fern VE7GZ
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