[Elecraft] Frequency Accuracy and stability

[Bob McGraw]

I ordered my K3S with "KTCX03-1-F TXCO 1ppm f/w correction to 0.5ppm".   
K3S-F s/n 10163

I use CW mode and CWT mode and tune to each of the WWV frequencies.  By 
pressing SPOT the radio resolves to the WWV frequency but will show any 
error either + or - of the WWV frequency.   By tuning up about 25 Hz and 
then pressing SPOT and then tuning down about 25 Hz and using SPOT one 
can easily see the error amount.    If all is correct, it will return to 
the WWV frequency +/- 0.0 difference.

I check 4 or 5 WWV frequencies and note any discrepancy.  I then can 
adjust the REF CAL up or down as needed and then re-check the WWV 
frequencies as described above.

I find this method is preferable to the "zero beat" method and assures 
the radio on all bands is +/- 2 Hz or better.   Good enough for me.

73

Bob, K4TAX