Roger G3XBM's (Mainly) Amateur Radio Blog

The modern way of getting (simply) into 10GHz WBFM appears to be using very low cost 10GHz Doppler radar modules with a 100MHz FM receiver. ...

G0LRD has already shown that what I have described as Doppler on 6m is, sometimes, the drift as my FT817 goes from TX to RX and cools down....

G0LRD compared spots of his signal from G4IKZ and from me and noticed greater drift on my reports than from Nick G4IKZ. I think Nick uses...

G0OQK (98km) is coming in here regularly today on 6m WSPR. Looking at his traces on my WSPR screen, there is clear evidence of airplane inv...

G0OQK (98km) has just spotted me on 6m WSPR with a large 4Hz Doppler, suggesting reflection/scatter from aircraft somewhere along the path....

On 6m it is amazing how much Doppler there is on longer distance GDX stations. The screenshot shows just how much Doppler there is on G4BRK ...

Even if Es is not around for me on 6m WSPR, then GDX certainly is. Just a few moments ago G4BRK   (134km) was spotting me at -18dB S/N wit...

CX2ABP (11127km) in Montevideo (GF15wc) has just been spotted here at -25dB S/N on 10m WSPR even though propagation is supposed to be "...

Today, so far, it has been exclusively local G4IKZ (18km) on 6m WSPR  One thing I have noticed both on his spots and those b y G4FFC (45km...

There must be more local flying activity at Cambridge Airport on Sundays (private flying?). On my 6m 1624z transmission there was 3Hz Dopple...

Very quiet, so far, on 6m with just G4IKZ (18km) and G4VXE (136km) spotting my 1W ERP WSPR today as yet. No Es yet. G4VXE' signal he...

On shortish distance WSPR , especially on 6m and shorter wavelengths, Doppler shift from aircraft is a real issue: signals arrive directly a...

Note Doppler on signals at 1742z This evening some very strong signals have been coming in from North Africa on 6m by Es. CN8LI has been...

This afternoon, before working some QRP DX on 10m and 12m SSB I had my WSPR system running and spotted FR1GZ (Reunion Is) several times at ...

Just decided to do a little 6m WSPR beaconing this afternoon and evening. So far no reports of my signal, but I'm copying EA4BMG quite ...