Re: K3- To zero beat or not to zero beat

Posted by Bob McGraw - K4TAX on Feb 22, 2019; 7:16pm
URL: http://elecraft.85.s1.nabble.com/K3-To-zero-beat-or-not-to-zero-beat-tp7649117p7649137.html

This is a good method.   See my article in ARRL QST, September 2015,
TRANSMIT AND RECEIVE ON FREQUENCY.   I suggest using software for PSK-31
as the AFC will always lock onto the audio frequency and then show the
actual frequency.  It is usually good for 1 Hz resolution.

73

Bob, K4TAX


On 2/22/2019 11:28 AM, Randy Farmer wrote:

> A better method is to tune the receiver to the carrier frequency of
> the highest WWV frequency you can hear. Then put the receiver in SSB
> mode and look at the line out audio with a soundcard-based spectrum
> analyzer such as Spectrum Lab
> (https://www.qsl.net/dl4yhf/spectra1.html). Check to see if the 500 Hz
> and 600 Hz tones are correct. If not, adjust the REF CAL to make them
> right. Be sure to check on both USB and LSB; you may have to split the
> (usually very small) difference between the two sideband responses.
>
> 73...
> Randy, W8FN

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html