Posted by
Don Wilhelm-3 on
Apr 17, 2007; 12:48am
URL: http://elecraft.85.s1.nabble.com/K2-frequency-adjustment-tp445744p445746.html
Brett,
Since you can probably hear 10 MHz WWV at your QTH, why not use that
signal in LSB or USB to set C22 very accurately. The method to do that
is on the Elecraft website on the Builder's Resource page.
I also recommend that one use Spectrogram to tell when WWV is tuned
'just right' - I place markers at 500 and 600 Hz and watch as the
transmitted tones line up with the markers. Once you get it right, you
can expect proper dial calibration within 20 Hz typically. The whole
procedure is in the K2 Dial Calibration article on my website
http://w3fpr.qrpradio.comWhen you are done, if the K2 tunes in WWV in LSB or USB mode with
accuracy, all bands will also be accurate. Then if you find yourself
off frequency, you can blame the other radio.
73,
Don W3FPR
Brett gazdzinski wrote:
> Funny, I had today off and decided to do the same thing.
> I used the 756 pro as a source, did the adjustment, redid
> all the filter bfo settings, and went from 4000 Hz off to about 500,
> but I could not tell as I could not zero beat and did not think
> of changing the filter.
>
> When both the 756 and the K2 are tuned to the same frequency,
> they hear each other, but at maybe 400 or 500 Hz differences.
>
> Close enough for me anyway...
>
> Last time I did my filters, I paid a lot of attention
> on getting things to sound the same between filters and
> CW normal and reversed.
> Tune a signal in spot on the nose (same as sidetone) and
> switching between cw normal and reverse does not change the pitch.
>
> That is useful if you have qrm on one side.
>
> Listening on CW or ssb and changing filters does not change the
> pitch any, which is nice...
>
> The radio really does work well!
> I enjoy listening to cw (at speeds to fast for me to copy)
> for hours! ssb sounds good in the headphones, the little speaker
> inside the K2 does not really cut it for ssb...
>
> Brett
> N2DTS
_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help:
http://mailman.qth.net/subscribers.htmElecraft web page:
http://www.elecraft.com