[Elecraft] vfo stability mod (again)

[David A. Belsley]

Well, I just pulled down my /p station here on Martha's Vineyard and am 
ready to take the trip back to the home qth in the morning after a great 
month.  The K2 (barefoot -- I switched back to the stock lid) behaved 
beautifully despite the rotten band conditions, and I was able to work a 
bunch of other K2s.  I was also able to take advantage of being on the 
island to have a good time in the IOTA contest.

But my main interest in writing is to note that the vfo mod is really 
effective.  I did this mod a long time ago, but never was able truly to 
test it, since my shack has fairly constant temperature.  However, here in 
my /p shack in the loft of a converted barn, the temperature variations 
were quite high.  During the heat of the day, in the uninsulated loft, the 
temperature went often into the high nineties, while at night it could drop 
off into the low sixties.  Over this range, I noticed no measurable 
temperature variation after about 20 minutes of warm up.  Within 20 minutes 
of power-up, there would be a change of about 40Hz -- then complete 
stability.  Sure can't complain.

best wishes,

dave belsley, w1euy

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David A. Belsley
Professor of Economics