http://elecraft.85.s1.nabble.com/Zero-Beat-Procedure-for-the-Elecraft-K3s-DRAFT-tp7641639p7641652.html
That would make the text a great deal less daunting. <smile>
> Clay and all,
>
> That is good work, but I feel it is overly complex.
>
> The secret to using the zero-beat method for the Reference Oscillator
> is in the ability to correctly tune WWV (or other standard station) to
> zero-beat.
>
> I make use of an audio spectrum analyzer running with my PC and
> soundcard. Spectrum Lab will do fine, but I use Spectrogram v16. For
> those who want Spectrogram 16 or 5.17, they are available on my
> website www.w3fpr.com - scroll down near the bottom of the opening
> page and you will find the links. Those files are local to my website
> and have been scrubbed many times for virus.
>
> With Spectrogram running, first tune WWV and feed the K3 audio to the
> soundcard input using SSB mode. Knowing that WWV transmits 500 and
> 600 Hz tones with a 1 second 1kHz tone at the start of each minute, it
> is easy to properly tune WWV (in SSB mode).
>
> Now switch the K3 to CW mode, and you should see the carrier displayed
> at your sidetone pitch on the Spectrogram screen. Adjust the tuning
> slightly if not true.
>
> Now that WWV (or other standard station) is tuned properly, lock the
> VFO and follow the other instructions in the Zero-Beat (Method 2) in
> the manual.
>
> All done.
>
> 73,
> Don W3FPR
>
> On 6/4/2018 12:32 AM, Clay Autery wrote:
>> It was not until recently that I acquired the TMP connectors and
>> crimp tool to make a proper jumper cable from my K3s' J1 connector on
>> my K3s’ TXCO (TMP) to my frequency counter (BNC), so I have always
>> used the "zero-beat" method. Periodically, I go back and repeat the
>> TXCO calibration using a modified "Method 2 (Zero-Beating)" procedure
>> (K3s Owner's Manual, Rev A1, p.53). It originated (and grew) from a
>> post snippet from this reflector. (Thanks Scott, K9MA) IF you have
>> an Elecraft P3 Panadapter, or other, connected to the K3s’ IF Out,
>> you can use it to great facility in visualizing and verifying what
>> "is" and what you "do". I have written this procedure with the
>> assumption that the P3 is not present or is not being actively used
>> beyond observation. I may write an addendum later to include the
>> active use of the panadapter vs. as an observational tool only.
>>
>> For obvious reasons, the manual says to use the highest WWV frequency
>> available, and references 10, 15, and 20 MHz. Just in case you
>> missed it, NIST put WWV at 25 MHz back on the air sometime in 2015,
>> but they switched it to circular polarization around July of 2017.
>> Link:
>>
http://www.arrl.org/news/wwv-25-mhz-signal-swapped-to-circular-polarization
>> OR, back to the half-wave dipole depending on which reference you
>> read. <confused> Point is, that I am having great luck using it as a
>> reference signal.
>>
>> Of interest to some may be the inclusion of a very simple equation
>> that tells you how much and which way to adjust REF CAL in one shot.
>> No fuss, no muss, no futzing around and back and forth. You make one
>> observation, one calculation, one input and you're done. (Usually)
>> MOST of the procedure is in the setup.
>>
>> Go here to grab a PDF of the DRAFT document of the procedure I use:
>>
http://www.montac.com/pdfs/Elecraft_K3_Zero_Beat.pdf>>
>> 73,