I had some time today to mess around with my main tuning knob problem. I
once again removed the knob, and felt washer. Everything appeared normal,
there was nothing wrapped around the shaft, all nuts were secure, nothing
needed to be cleaned, etc. So I put it back together and all is working
fine. I also tried several times to change the clearance between the knob
and felt washer to try and reproduce the problem to no avail. I think the
VFO A encoder had some kind of problem from lack of regular use that has now
gone away. Remember, I only had the problem while rotating the knob
counter-clockwise, the tuning knob worked perfectly in the clockwise
direction. Anyway all is now well again in K3/KB2M land..
73 Jeff kb2m
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jeff KB2M
Sent: Tuesday, November 10, 2009 7:02 AM
To: 'Elecraft Reflector'
Subject: [Elecraft] Main tuning knob rough
I just noticed a problem with the main tuning knob on my K3 #1516 this
morning. I noticed it when I was tuning around using the finger dimple. The
odd thing is it only feels rough when you turn the knob counter-clockwise
while applying slight pressure to facilitate using the finger dimple. I took
the knob off, repositioned it(making sure it was clear of the front panel
and not crooked, it wasn't) and still have the problem. It is bad enough
that after several turns it causes the rotation to stick. Once again this
only happens when turning counter-clockwise, with slight finger pressure in
the dimple.
What I find interesting is that I hardy use the tuning knob as I use an
LP-Pan with PowerSDR and tune around with a mouse. I get the feeling that
the problem is with the VFO A encoder. Any ideas?
73 Jeff kb2m
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