Login  Register

Re: K3 question/problem

Posted by dave.wilburn on Jan 02, 2008; 7:26pm
URL: http://elecraft.85.s1.nabble.com/K3-question-problem-tp457849p457851.html

I have had a great deal up success using Spectrogram as Don describes.
This page is very helpful for understanding what goes on, minute by
minute, with the WWV signal.

http://tf.nist.gov/stations/iform.html 
-  

David Wilburn
[hidden email]
K4DGW
K2 S/N 5982


On Mon, 2007-12-31 at 18:32 -0500, Don Wilhelm wrote:

> Cary,
>
> 500 Hz high?  Now that sounds like you did the zero beat correctly, but
> at one of the WWV tones rather than the carrier.  I suggest you try
> again.  If you want to try an alternate to audible zero-beat, see below
> - there will be no confusion about whether you are zero beating a WWV
> tone or the carrier.
>
> You might try an alternate to the Zero-Beating method by connecting the
> K3 to a computer running Spectrogram.  Tune the receiver in LSB or USB
> mode to 10.000.000 and listen to the WWV signal - put markers (pointers)
> in Spectrogram at 500 Hz and 600 Hz.  WWV transmits one of these tones
> on alternate minutes.
>
> Then enter the CONFIG menu and find REF CAL.  Tune the VFO A knob until
> the tones from WWV line up with the markers in Spectrogram.
>
> I consider the above method more accurate than using a frequency counter
> of unknown calibration.  Of course the audible zero-beat method works
> fine too, but there is always the possibility of confusion about whether
> one is zeroing the carrier or one of the transmitted tones.  The warning
> about being certain you are zeroing the carrier goes back to the days
> when we were calibrating our secondary frequency standards - one must
> wait for a silent minute to be certain we zero the carrier.
>
> Happy New Year.
>
> 73,
> Don W3FPR
>
>
>
> H. Cary III wrote:
> > ... I have done the frequency synthesizer alignment using the zero beat with WWV but when I tune WWV at 10 MHz, I have to get the dial to about 9.999.92 or so to be right on it.
> >
> > I have a sked on Sundays with two friends, W5ZNN and WA6EBB, and was hoping to have my K3 operational so they'd be my first contacts.  Well, in a sense they were but apparently my signal is about 500 hertz higher than my receive frequency AND the audio sounds narrow and broken.  I think the problem may be with the frequency synthesizer alignment...I used the zero beat method until I can get my hands on a frequency counter from some of my more electronically astute ham friends...am I looking in the right direction or should I be looking somewhere else?
> >
> > Best New Year Wishes to y'all.
> >
> > 73,
> > Cary, K4TM
> > Lynchburg, VA
> > _______________________________________________
> > 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.htm
> > Elecraft web page: http://www.elecraft.com
> >
> >
> >  
> _______________________________________________
> 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.htm
> Elecraft web page: http://www.elecraft.com

_______________________________________________
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.htm
Elecraft web page: http://www.elecraft.com