[Elecraft] K2 off frequency

[Don Wilhelm]

  Adi,

The PLL range has no relationship to the adjustment range of C22.
How confident are you that the external frequency counter is accurate?  
That is an important consideration.

An alternate (and better) method is to tune the K2 to a station that you 
know the broadcast frequency with precision.  We here in the US can use 
WWV, but there is a standard frequency station in Russia that works well 
for those in Europe.  I am not familiar with its tone transmit 
structure, so you will have to gain some information about that station.

Take a look at the N6KR method for setting the reference oscillator 
detailed on my website www.w3fpr.com article on K2 Dial Calibration - 
substituting your standard station for WWV.  That method does not depend 
on anything other than tuning that standard station correctly (ignoring 
the dial of the K2).
Once you have set C22 properly, continue with the steps in the procedure 
and your K2 frequency readout should be correct to within 20 Hz.

73,
Don W3FPR

On 6/7/2011 6:17 AM, Adi Toplician wrote:
> Hello Om’s
>
>
>
> I am the happy owner of a K2 and I need some advices on the alignment
> procedure.  My K2 is off frequency by about 300Hz. (I'm using an Orion for
> the test)
>
> I start from “4MHz Oscillator calibration” using an external counter. On TP3
> the frequency on the internal counter is abt 12078 and 12.043 to 12044 on
> the external one. I try to modify the value of C22 but no chance to make the
> two equal. Until now I make all the measurements with the internal counter
> and on the "PLL reference oscillator range test" the range was around 18 KHz
> which I think is too much.
>
>
>
>