Variable frequency WSPR on 20m

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gm1oxb
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Last seen: 2 weeks 3 days ago
Joined: 2017/09/21 - 09:15
Variable frequency WSPR on 20m

Has anyone noticed a "variable carrier frequency" WSPR transmission just below the
conventional 20m WSPR band? It looks like a deliberate gradual frequency change of +20Hz then -20Hz
during the normal 2 minute transmission. It does not look like the drift seen due to temperature
or battery voltage.

Regards

David Owen
GM1OXB