[Elecraft] K2: squeezing rig causing frequency change...

[Don Wilhelm]

Steve,

It is normal that squeezing the bottom panel will cause a BFO shift due 
to the proximity of the BFO inductor to the panel.  One normally does 
not squeeze th epanel during operation, so it is not usually a problem.  
The BFO may also shift during the time the KPA100 is being put into place.

Now if reasonable pressure down on the mounted KPA100 causes a BFO 
shift, you either have something loose or the enclosure is being 
deformed in some manner - that behavior is not normal.

73,
Don W3FPR

Steve Kallal wrote:
> I was trying to calibrate the frequency on my K2/100 and noticed that 
> the received beat frequency changed when attaching the top cover (the 
> KPA100 option). After putting the mounting screws back in, I noticed 
> the frequency will again change when squeezing the top and bottom 
> covers towards each other with my fingers. The change is about 50 to 
> 100 Hz or so.
>
> Is this normal? Somewhat I don't think so, but hadn't paid attention 
> before. I've been monitoring WWV on 10 MHz in CW mode beating against 
> the spot tone. There is constant carrier to beat against, and I that's 
> how I noticed the beat frequency changed.
>
>