[Elecraft] K2 off freq on 10 meters

[David Woolley (E.L)]

Aaron wrote:
> 
> I finished my K2 about a month ago without any issues. The radio is spot 
> on with all bands except 10 meters. If I dial up 28.400.00 I am off 
> freq. To be on I need to dial to 28.400.17. Any ideas on this or how to 

There is nothing, other than corrupt firmware/faulty EEPROM, that could 
cause this result on a recent K2.  Even then, it would be difficult to 
imagine firmware errors that would result in a selective failure on 10m, 
as there is no reason why it would need to do a table lookup, based on 
band, when setting the synthesizer ratio.

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.

The only user tweakable factor that might cause an apparent band 
sensitive error would be a wrong calibration of a filter.  However, that 
would affect all bands, although the fault would switch between LSB and 
USB when you pass the point where the IF inverts, but there is only one 
place where that happens.

> correct it?  All other band are right on the money. I have installed the 
> SSB, NB, and KPA100 if that helps at all.
> 

-- 
David Woolley
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