Using WWV as a reference for precision frequency calibration is a bad idea. Propagation creates doppler effect. WWVB is better but still not perfect. A cheap GPS reference is the best (but still not perfect) option.
Sent from my iPad > On May 25, 2019, at 2:39 PM, Rick Bates (WA6NHC) <[email protected]> wrote: > > By ear is very close but if you already have WSJT-X, there is a calibrate > mode for the last few Hertz. > > Rick WA6NHC > > Smell Czech correction happen > >> On May 25, 2019, at 11:08 AM, Don Wilhelm <[email protected]> wrote: >> >> Hank, >> >> You don't need a highly accurate frequency counter. You can get closer with >> the beat note method. >> >> You can use an audio spectrum analyzer (like Spectrogram or SpectrumLab) >> running on your computer and the K3S rear headphone jack connected to your >> soundcard Line In. >> >> That will give you a visual display. When you turn on SPOT, if the two >> audio frequencies are far enough apart, you will see two both of them. >> When both frequencies are quite close, they will appear as one signal. >> When they are VERY close, you will see the "signal" begin to oscillate in >> amplitude - when that oscillation slows to zero, that is the beat point you >> are seeking. In practice it is difficult to get it to exactly zero, but get >> it as slow as possible - one or two oscillations each minute is practical >> using that method. >> >> If you need Spectrogram (Windows application), go to my website >> www.w3fpr.com and scroll near the bottom of the opening page to find the >> links. Those are internal links on my website, and the files have been >> thoroughly scrubbed for virus - although Norton does not like them because >> they do not have a large enough user list for that application. >> >> 73, >> Don W3FPR >> >>> On 5/25/2019 1:23 PM, [email protected] wrote: >>> I have just installed the 1 PPM TXCO in my K3S. I bought the K3S last >>> October as a kit and have installed many options since then. >>> One thing I'm concerned with is the reference calibration. Without a good >>> frequency counter, I'm using WWV on 15Mhz and using beat cancelation. My >>> ears are pretty good, but no match for a good frequency counter. >>> Any guys in the NW GA area (Tennessee, Alabama, and North Carolina area >>> really) that would be willing to help me set that reference calibration with >>> a good counter? I'd be willing to pay you for your time! >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
