[Elecraft] Poor choice of wording - DRIFT

[Don Wilhelm]

Jim,

When re-calibrating the reference, let things stabilize.  That means to
configure your K2 the way you will operate it - in your case, KPA installed.
Let it warm up for at least an hour.
Remove the KPA100 cover and quickly calibrate the reference oscillator.
Then replace the KPA100 and run CAL PLL and CAL FIL.  Yes, it is a bit of
trouble to button things up each time after changing the probe, but it will
make a difference.

73,
Don W3FPR

----- Original Message ----- 

> Sorry, I used a poor choice of wording there. I have noticed NO drift on
> any received signals or has anyone reported I drifted during a contact. I
> have not found it necessary to compensate for any shift in tuning. I just
> noticed that my calibration of the 4.00mhz oscillator had apparently moved
> for some reason. Since I had just installed the KPA100 I was curious if
this
> could be the cause.
> My PLL reference oscillator range is great, right where it ought to be. I
> am familiar with the WWV format and have in the past used Spectrogram to
> make sure I was using the proper reference. I recently had experienced an
> intermittent in the receiver that plagued me for days, but apparently I
> finally cleared that problem. So I recalibrated, this time waiting for the
> "tone" to go off to zero beat WWV. And yes, I ran CAL PLL and CAL FIL
after
> the calibration. :-) :-)
> I seem to remember a comment by someone somewhere that a reason for
> outboarding the KPA100 was to prevent temperature rise in the K2 itself.
> Right now I am very happy with the K2/KPA100 as it is. I will re-calibrate
> and see if maybe I moved something while doing the KPA100 install.
> Thanks for all the comments and suggestions
>
>