[Elecraft] [K2] Erratic tuning solved, I think

[skavanagh72 at yahoo.ca]

I took the front panel and control boards off the RF board and reassembled them....the intermittent lack of response to tuning knob returned after a couple of minutes.

So I tried Don's first couple of steps (reflowing solder on encoder lead and front panel board U3) and that seems to have done the trick. Thanks, Don!

Just before I did this I also noted that when the tuning was not working the ENC A (or B, I didn't note which) was at a constant 4.3 V instead of switching between 5 V and something below 1 V as the tuning knob was turned, and that the overall power supply current dropped either 20 or 40 mA from the normal value.  I am not sure quite what wasn't getting current but the solder reflow seems to have stopped it from happening.

Now if only I had gotten to this before last weekend's contest!

73,
Steve VE3SMA