[Elecraft] Adjusting reference frequency some time after tx compensation

[David Orman]

Hi,

A while ago (months) I did the extended temperature compensation procedure
using the XG50, which seemed successful. I decided to tune up to 20MHz
recently, and noticed when in CW mode, if I ran spot (manual) I was off, by
a small margin (33Hz). I'm assuming this is normal as time goes on, is this
a correct assumption?

Second question: assuming it is normal, and I should periodically
re-calibrate using the XG50 or a known signal like WWV, is it safe to go to
ref cal in the menu, unlock it, and manually tune/zero beat to adjust the
frequency - without losing the calibration gained from doing the extended
temperature compensation procedure? I'd rather not have to repeat that
process any more than necessary, so I'm hoping the look-up table that
generates is for something like offset based on temperature and so remains
constant, and only the main reference calibration needs changing? I did
this to test, and the menu item is still 'REF*CAL'. Tapping CMP while in
this menu option, I have verified it is set to 'CUSTOM'.

I appreciate any feedback,
David