[Elecraft] K2: K2/100 birdie @ 3589

[VK7JB]

Hi All,

I've just finished K2/100 #6998.  After blowing the PA transistors of the
base K2 by accidentally dropping the frequency probe into the works, I've
completed the KPA100, installed it and all is working very well.  Made
several SSB contacts tonight and I couldn't be happier.  I have a great
sense of achievement :)

I'm curious about a prominent birdie, zero beat at 3589khz.  It's present,
and more prominent, with the antenna disconnected and has its origin
internally.

There are some postings about this birdie from around 2008, but I don't see
any resolution.  I can live with it, even though it's inconveniently located
right where I like to work on SSB phone.  Did anyone work out where this
comes from and whether or not there is a simple fix?  

Also, I've calibrated the K2 reference oscillator several times according to
the N6KR method.  The result is that my frequency display is 20hz off
frequency after the rig has warmed up:  eg it reads 9999.98 for 10000.00 WWV
signal.  Am I correct in understanding this is about as good I can expect
given the DAC parameters of the K2?  I can't seem to improve on it further
by repeating it.

73,

John
VK7JB
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