[Elecraft] K3- To zero beat or not to zero beat

[Bob McGraw K4TAX]

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