[Elecraft] K2 Alignment Part II

[Don Wilhelm]

David,

Bypass that - that initial "4 MHz Oscillator Test" is just to make 
certain the 4 MHz oscillator is working.
What you are doing is comparing the 4 MHz oscillator output to what the 
firmware "thinks" is a 4 MHz source.  So as long as it is oscillating, 
the test will always pass.

If calibration of the 4 MHz oscillator is your goal, and you have the K2 
capable of receiving WWV (or some other station of known frequency), go 
to my website www.w3fpr.com and look at the K2 Dial Calibration 
article.  The N6KR method will provide you with precise setting of C22 
with no external equipment, and that method compensates for any 
variables in the various oscillators involved.

The use of Spectrogram or other audio spectrum analyzer software to 
detect the tones transmitted by WWV is strongly recommended.  Tuning to 
the "standard" station correctly is the key to success when using that 
procedure.

73,
Don W3FPR

On 8/27/2011 3:30 PM, David Dietrich wrote:
> Hi Everyone!
>
> I am starting the second part of the K2 alignment.  I went and redid the first part of the alignment because I tweaked R1 by accident.  Some of the numbers came out different than the last time because I had more stuff on the board.
>
> I do have a question about the 4 MHz Oscillator Calibration:
>
> This may sound like a stupid question, but what am I supposed to be listening for on my receiver when I zero-beat to the crystal?  I am hearing a tone, and it changes when I adjust C22, but I am not sure to what tone I need to adjust it to.
>
> Any clarification on this would be great!
>
> Thanks&  73,
>
> David
> KC9EHQ
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