[Elecraft] K1 BFO Alignment - more

[Paul Barlow]

I now have taken the advice offered to use Spectrogram - why didn't I think
of that? D'oh!!!
I can now see the filter pass band and move the peak around using c20, but I
can't get the pass band centre anywhere near 700 Hz, perhaps only 450-500Hz.
This seems a bit low. Where should I look, or do I just have a recalcitrant
crystal? I don't see any other variable which might interact with the BFO
frequency.

72/73

Paul M0CDP