[Elecraft] N6KR's 4 MHz oscillator cal method for the K2

[John R. Lonigro]

Folks:

You can zero in WWV very easily and consistently, using one of these 
methods:

1) (if musically inclined):  The pitches they send are usually 500 Hz or 
600 Hz.  See their website for the schedule.   500 Hz is approximately 
the note B on a piano (B is about 494 Hz, certainly close enough). 
 While in USB or LSB, try to match (zero beat) their 500 Hz tone with B. 
 If you can do that, you are within 6 Hz of dead on.

2) (not musically inclined): Tune in WWV on USB until you think it is 
right (based on voice pitch of the announcer, for example).  Then switch 
to LSB.  The voice pitch should not have changed.  Also, you can check 
with the tones they send.  Switching from USB to LSB and back shouldn't 
change the pitch of the tones, if you have them tuned in precisely. 
 (Skip over CW mode.)  Other than the finite tuning step size of the K2, 
you should be able to tune in until it sounds the same on USB or LSB.

3) You could match the 600 Hz WWV tone with your 600 Hz sidetone (in 
CW), but uncertainties in the sidetone frequency may make this method a 
little less accurate than either of the two above.

John AA0VE (K2 #3401)

Steven Gibbs wrote:

> Uncertainties in your method arise from
> * difficulty in *consistently* judging when the standard
>   frequency is zeroed in;