[Elecraft] PLL upgrade

[TJ Campie]

 So quite a while back, I posted on this reflector about a "problem" I was having with my K2 changing apparent frequency (not displayed) drastically based on squeezing the case. It seemed as if the BFO was moving but I eventually got it to settle down and I was just more careful. 

Today I decided I would dig more into the situation because I was tired of the thing swinging all over every time I moved the radio, which is fairly often as I do go portable somewhat often. I hooked up the Freq counter to TP2 (BFO) and squeezed here and there and got the radio to behave as before but I did not notice the frequency shifting at all. The issue was not in the BFO as first thought. I looked some more and hooked up to TP1 (VFO) and saw right away what was happening. The VFO would shift by up to 10k every time I squeezed the case and eventually settle back where it was previously. With the lid off, I looked around and poked and prodded until I noticed that touching the PLL upgrade board caused the mystery behavior. I did not see anything odd on the board but I wiggled it a bit and moved it further away from the nearby IC and it finally stayed stable. I re-assembled the radio and could not get the mystery behavior to return. I have squashed the beast! 

Anyway, I wonder if any others have had this problem. Hopefully this will help as I have searched but found no other references to this issue. 


73, W0EA
-- 
TJ Campie