[K3VOA] A multipath MFSK32 moon

[Kim Andrew Elliott]

Some interesting reception this weekend on my Shortwave Radiogram 
<http://swradiogram.net> project.

One of the broadcasts is Saturday, 1600-1630 UTC, 9400 kHz, from a 100 
kW transmitter in Bulgaria.  I received it using an SDR near Edmonton, 
Alberta.  The signal had a pronounced echo, indicating it was being 
received via both short and long path (or long and longer path).  The 
MFSK32 image transmitted at 1618 UTC also showed the effects of the 
multipath.  It's not often that the moon eclipses the moon ...

Another Shortwave Radiogram transmission was this morning at 0800-0830 
UTC on 5850 kHz from WRMI in Florida. I had a very weak signal using an 
SDR in Japan.  The MFSK32 text decoded only about 50%, but the image 
managed to get through ...

During the broadcast, we transmitted about 5 minutes of Thor Micro, a 
very slow mode.  It was received in Japan more successfully than the 
MFSK32 (see attached).

Fun with HF.

Kim

KD9XB






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