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Re: K2 off frequency

Posted by yo2liw on Jun 08, 2011; 5:08am
URL: http://elecraft.85.s1.nabble.com/K2-off-frequency-tp6448902p6452364.html

Hello Don



Thanks for the replay and all the useful info’s. It was quite easy to find
another counter (don’t know how calibrated) and now the difference is around
40Hz which is a great improvement from 300Hz.



Anyway I will try to use the RWM station signal also. Thank you everyone for
your time and advices. It is my first Elecraft, and I am really happy with
the rig.



Dave, Vincent, Dave thanks for additional info about RWM and calibration.



Best wishes!



73! Adi

Yo2liw



On Tue, Jun 7, 2011 at 7:05 PM, Don Wilhelm <[hidden email]> wrote:

>  Dave and all,
>
> Actually the frequency of the station makes no difference at all.  The
> "secret" is that the difference between the VFO and BFO frequencies (in
> LSB or USB only) is equal to the frequency of the station you are tuned to.
> With 10 (or 15 MHz) WWV, the subtraction is easy since all but the first
> digits of the station frequency are zeros, so all the lower order digits
> will match.  When using RWM or some other station that transmits on a
> XXXX.00 frequency, that match will only occur in the digits after the
> decimal - one should do the subtraction as a confirmation that there is
> not a 1 kHz error.
>
> 73,
> Don W3FPR
>
> On 6/7/2011 11:41 AM, Dave Sergeant wrote:
> > But bear in mind this is at 9996kHz, 4 kHz away from 10MHz. I thought
> > the way the K2 PLL worked meant you had to calibrate at exactly 10MHz,
> > so calibrating against RWM may not give correct tracking on all
> > frequencies. It also transmits a pure carrier only for a few minutes
> > each hour, making it hard to use.
> >
> > It is a pity that WWV is very rarely at a strong enough signal in
> > Europe to be used as a calibration reference and there is currently no
> > other one to use.
> >
> > 73 Dave G3YMC
> >
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--
==============
Adrian Toplician
0721 367 850
Timisoara
YO2LIW
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