Thanks for pointing out the likely culprits, Don. That's quite a record of
repair jobs...it's no wonder you know your way around the K2!
I figured it was unlikely to be the encoder but I thought I'd check just in
case.
73,
Steve VE3SMA
On Monday, June 10, 2019, 10:21:10 a.m. EDT, Don Wilhelm
<donw...@embarqmail.com> wrote:
Steve,
It is rare to find a faulty encoder. Those encoders are the optical
type and almost never fail. I have seen only one failure in the time I
was repairing K2s and I have dealt with over 1000 repairs.
I would first reflow the soldering on the encoder wires and Front panel
U3 as well as P1, RF Board J7 and Control Board P2. Also reflow Control
Board U6 pins 8 and 16.
73,
Don W3FPR
On 6/10/2019 9:09 AM, Steve Kavanagh via Elecraft wrote:
> One of my K2's has developed a problem where it is (somewhat intermittently)
> unresponsive to turning the tuning knob. Turning the knob may or may not, at
> different times, cause the radio to change frequency. Pushing on the
> case/panels and tapping the tuning knob sometimes seem to help, so I am
> suspicious of the board-mating connectors and solder joints for the encoder.
> This happens regardless of tuning step size or VFO A/B choice and does not
> affect the RIT.
>
> A few questions before I tear into it:
>
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