[Elecraft] K2 off freq on 10 meters

[Julian, G4ILO]

David Woolley (E.L) wrote:
> 
> 
> Older K2's needed calibration of the reference oscillator tweaking (CALL 
> PLL) on different bands, but modern ones just proportion the corrections 
> from those on 40m.  I suppose it might still construct seperate tables 
> for each VFO range, and one of those may have been corrupted.
> 
I think you have hit the nail on the head there, David. The K2 does not
generate its VFO steps with synthesizer accuracy. It guesstimates the
voltages needed to tune the PLL to specific frequencies in between the
coarse synthesizer steps.

If the VCO voltage is not within the range it should be then the
voltage/frequency curve will be very non-linear and this could account for
the error Aaron is seeing. I would check this first, and remedy it if
necessary - I can't recall how, exactly, but it's probably a matter of
adjusting the turns on the appropriate inductor - and then re-do the
calibration procedure.

-----
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Blog    http://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
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