[Elecraft] K3 Frequency Calibration

[David Hachadorian]

That Keuwlsoft Audio Frequency Counter is pretty cool!  Thanks for 
pointing it out.

I found the easiest way to use it is to put the K3 in reverse CW, tune 
to 10.000000 MHz, and set REF CAL to a setting that "eyeball averages" 
best to your PITCH setting.  Even with the eyeball averaging, it is 
pretty obvious which REF CAL setting is best. Use reverse CW, because if 
you rotate REF CAL to the right, the pitch will increase, so it is more 
intuitive than normal CW.

I will use this as my go-to cal procedure.

Dave Hachadorian, K6LL
Yuma, AZ


On 12/19/2021 5:18 AM, Nate Bargmann wrote:
> * On 2021 18 Dec 23:09 -0600, David Hachadorian wrote:
>> After exchanging emails with N4ZR, who started this thread, we think this is
>> the easiest procedure:
>>
>> Tune the rig to 10.000 MHz in CW mode.  Listen to the tone of the WWV
>> carrier, which should be close to your CW PITCH setting.
>> Switch back and forth between reverse cw and normal cw, adjusting REF CAL
>> until the tones are equal in pitch on normal and reverse.
>>
>> This procedure should get you calibrated well within 1 Hz, much better than
>> required for any amateur radio application that I can think of.
> In addition, I installed the "Keuwlsoft Audio Frequency Counter" app on
> my Android phone and set it next to the speaker.  Its display in Hertz
> makes dialing in the reference calibration value quick and easy.  On my
> K3 it shows about .5 Hz difference between Norm and Rev.  I certainly
> cannot hear that!
>
> 73, Nate, N0NB
>