[Elecraft] A minor C22 question

[Howard W. Ashcraft]

Last night I redid my C22 reference oscillator adjustment using WWV on 10mhz as the zero beat reference.  This is the third time I have adjusted C22 and each time I am able to adjust C22 to a precise offset balancing TP1 and TP2.  However, when I put the cover back on the K2/100 I find that WWV zero beats a few tens of hz off.  (After last night's adjustment, the zero beat was 10000.03)  One should expect to be +- 10 hz as that is the finest resolution of the VCO, but it would be nice to get a little closer.  

The unit was thoroughly warmed before adjustment although there may be some temperature difference between having the cover on and having the cover off.

This is hardly a big deal, but I wonder whether others manage to get an exact setting or whether this is a process that you repeat until you finally nail the adjustment.

HOWARD W. ASHCRAFT, Jr.  W1WF
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