Quality of reported transmit frequency

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Joined: 2014/04/09 - 14:38
Quality of reported transmit frequency

Question to all: do you also experience so many spots with a big spread in Hz? Not many spotters are spot on.

I have 2 wspr beacons, sending once every hour on 5 bands.

I do see a very big difference in reported frequency on all bands and for all beacons. Although the beacons themselves are gps controlled and stabilized. Even when not one would expect the spotters to be close to one frequency.

Is this mis-measurement increasing since a few years ago?

Could it be due to the low entrance barriers due to using Raspberries and other simple receive solutions?
Or do the operators currently not care for calibrated frequency control anymore?

I will try to do the historical analysis based on the archives of previous years.

Hope to hear your reactions,