[Elecraft] CAL PLL with the top off

[Don Wilhelm]

Vic,
I have always done CAL PLL and CAL FIL with the top off (right after setting
C22).  I never thought about it - just did it because it was easier (you
have to remove the probe after doing CAL FIL).  My K2 is quite consistent in
being able to zero to WWV at all the frequencies that I can receive, so
something must be right.  One warning though - I learned early on that the
bottom cover MUST be on for CAL PLL and CAL FIL or subtle strange happenings
occur.

Some folks seem to be concerned about temp drift, but my shack is usually in
a conditioned environment, so it is usually at a temperature that makes
keeps my body comfortable too - and that is good enough for me.  If I do get
into a situation where the K2 is subjected to quite cold or quite warm
conditions, you can bet that I will be busy keeping either the chatter of my
teeth quiet or wiping the sweat from my brow and will not be so concerned
about VFO calibration <G>.

----- Original Message -----
>
> This implies that I could do the whole process of setting the 4 MHz
oscillator
> and doing CAL PLL and CAL FIL with the lid off.
>
> I've noticed that putting the lid on affects the frequency a bit, so I
find
> myself struggling to adjust the oscillator so it will be right when I put
the
> lid back on!
>
> Does anyone disagree with this?
>