Multiple applications can very accurately measure the audio frequencies, such as freely available FLDGI
Tune in WWV and adjust the dial until the audio frequency?in a single sideband mode is exactly where it should be, as an audio tone.
The dial displayed frequency now displays how far off from perfect your calibration is.? ?
Do some math and reset the software's understanding of the crystal frequency so as to correct for the error.
When you get it right, you should find that the single sideband tone is precisely at the right audio frequency?when your dial is precisely at the WWV frequency.
On 2021-05-31 13:30, Curt via wrote:
> Jerry
>
> Why not tune in the same cw signal with your ubitx and ts590. It will
> be as good as your ears, so it will be just fine.
*** I was thinking something like that.? Or how about this:
The 590 has an AM receive mode.? I make up some sort of resistive
combiner/dummy-load so I can receive WWV and listen
to my ubitx transmit at the same time.
? ?In the meantime, I ordered one of those cheap GPS-disciplined
oscillators on Ebay.
