Hi Remember - there's more than one station on 5, 10, 15 and 20 MHz. You may be picking up the modulation from one of them. Ionospheric shift can easily give you a few Hz on HF.
Back when I was doing FMT stuff there was no ionosphere involved. I was within ground wave of Newington …. Bob On Sep 19, 2013, at 9:48 AM, quartz55 <[email protected]> wrote: > I was playing with SpecLab and my TS-2000 just to see how accurately I could > measure frequencies in the HF region. I notice when I set the rx on cw and > listen to the 750 Hz output of WWV at 15 or 20 MHz with SL, I get like 2 and > sometimes more tracks about 2 Hz apart constantly shifting around. I assume > this is Doppler going in and out? If that's so, how can anyone reasonably > expect to measure any ionospheric HF signal in the mHz range? > > Dave > N3DT > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
