[Elecraft] "de-sensitizing" C22

[Vern Kollas]

Good morning to all....

First of all my K2 (base CW) is finally complete and
has passed all of the basic tests with flying colors. 
Now that I can receive on all bands, I decided to go
back and do a more thorough calibration of the 4MHz
reference clock and then start on the filters before
moving on to build the SSB module and the 100W amp. 
After reading through some of the reflector archives,
checking some of other resources on the Elecraft site
and passing some emails back and forth with Tom, N0SS,
I finally got a good understanding of how the
calibration works and what needed to be done.  I am
able to get pretty close, in fact I had it within 50Hz
to start with, and at one point had it at about 23Hz
off.  However, that is about as good as I have been
able to get it. Once I get to a certain point, just
breathing seems to move the frequency when adjusting
C22.  I know I am really close, but I would love to
see if I can really get it closer.  So my question for
the group here is there any way to make C22 not so
sensitive to even just touching it with an alignment
tool??  I have read where some have added a cap in
parallel with C22 to "extend" the range, but would
this also help it to not be so touchy to adjust??  Or
should I just look to replace C22 entirely with a
different cap??

I know I shouldn't be quite so picky, but hey, that is
the fun of building the radio.  You can tweak things
and make it do what you need/want it to do.  I also
must say that I am REALLY impressed with this radio so
far.  It does receive very well, and the filters seem
to be working VERY well with just the default
alignment.  I am really getting excited to see how
well it will work once I get Spectrogram and "do it
right".

Anyway, thanks for letting me ramble on here and
thanks in advance for the help!!

73!

Vern -- KC8YOH  

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