[Elecraft] K2 Frequency Adjust

[Don Wilhelm]

John,

If you go through the whole alignment procedure for the K2 Dial 
Calibration, those shifts will go away.  If they get smaller but do not 
disappear, then just do it over again.

It is important for you to do the entire procedure each time - set the 4 
MHz reference oscillator, then run CAL PLL, then 'change' *each* BFO 
setting.  If your BFOs are set to properly position the passbands, you 
do not actually have to alter the BFO setting, but you do have to make 
the firmware think it has been changed - move the BFO frequency a small 
bit and then move it back to where it was so the processor will think it 
has been changed and it will write new DAC values into the EEPROM.  You 
must do that for each BFO separately.

If you are within 20 Hz of 10 MHz WWV, that is close to the limit of the 
DAC resolution, and you may not be able to get it any closer than that - 
but you can try for 10 Hz if you have enough patience.

73,
Don W3FPR

John Huffman wrote:
> I noticed my K2 frequency is a bit off.  I zero-beat WWV at 9999.95 and 
> will use the N6KR method for setting the 4 MHz reference oscillator.
> 
> But, I noticed this, too.  If I switch from CW to CW-R, the carrier tone 
> is the same.  But, if I then go from LSB to USB the 600 hz. WWV 
> reference tone is 590 hz in LSB and 620 hz in USB.
> 
> What do I need to adjust to get the 600 hz WWV reference tones to be 600 
> hz in both LSB and USB?
> 
> Thanks to Spectrogram for making this nit-picking possible  :-)
> 
> 73 de K1ESE
> John