[Elecraft] K2 frequency drift

[adamkern at uchicago.edu]

Hi again,

As a few people pointed out, I misspoke in my earlier email.

When I calibrate C22 I immediately run CAL PLL and CAL FIL.  
True, the K2 does not directly reference C22 during normal 
operation.  My calibration of C22 and then CAL PLL and CAL 
FIL is all by-the-book.

That being said, I still do notice a temperature-dependent 
frequency drift during normal usage.  The drift is 
predictable, with the zero beat on the dial I get with 
reference to WWV drifting by as much as 70-80 Hz if the 
temperature difference between ambient and the max temp the 
rig hits with the KPA100 under heavy use is large.  The 
frequency at which I can zero-beat WWV does not change 
unpredictably.  The radio consistently zero-beats low (e.g. 
WWV zero-beats at 10.000.07) when cold.

Is this a really big deal?  On SSB, certainly not.  On CW I 
like to zero-beat dead-on with the narrow filters.  Perhaps 
I'm just being a perfectionist.

Adam, N1KO