Shortwave Radiogram, 1-4  October 2020: Digital modes that will get to Mars before the next rover


Last week’s experiment with MFSK16 produced some successful decodes when
the MFSK32 and MFSK64 text was less than 100%. I had a couple examples
on 15770 kHz from WRMI Florida using SDRs in Russia and Ukraine. For
some reason, my decodes of the MFSK16 from WINB on 9265 kHz were largely
unsuccessful, even though the MFSK32 and MFSK64 text decoded correctly.
WINB audio is a bit strange.

We also had fun with the retro black-and-white test pattern, transmitted
in MFSK16, 32, and 64, to compare resolutions of the decoded images.
Thanks for the results submitted to the @SWRadiogram Twitter and via

Videos of last weekend’s Shortwave Radiogram (program 171) are provided by Scott in Ontario (Friday 1300 UTC) and Frigid RF in Virginia (Sunday 2330 UTC). The audio archive is maintained by Mark in the UK. Analysis is prepared by Roger in Germany.

This weekend’s show is in the usual MFSK32 and MFSK64, with eleven images, all MFSK64.

Here is the lineup for Shortwave Radiogram, program 172, 1-4 October 2020, in MFSK modes as noted:

1:46  MFSK32: Program preview
2:48  TikTok launches US election guide
5:29  MFSK64: Next NASA Mars rover will be target for lasers*
11:49  This week’s images*
28:25  MFSK32: Closing announcements

* with image(s)

Please send reception reports to

And visit

Twitter: @SWRadiogram or (visit during the weekend to see listeners’ results)

Facebook group:

Shortwave Radiogram Gateway Wiki

Shortwave Radiogram Transmission Schedule

| UTC Day  | UTC Time      | Frequency        | Transmitter       |
| Thursday | 2330-2400 UTC | 9265 kHz         | WINB Pennsylvania |
| Friday   | 1300-1330 UTC | 15770 kHz        | WRMI Florida      |
| Friday   | 1500-1530 UTC | 15750 kHz DRM    | WINB Pennsylvania |
| Saturday | 0230-0300 UTC | 9265 kHz         | WINB Pennsylvania |
| Saturday | 1330-1400 UTC | 15770 kHz        | WRMI Florida      |
| Sunday   | 0800-0830 UTC | 5850 and 7730 kHz| WRMI Florida      |
| Sunday   | 2330-2400 UTC | 7780 kHz         | WRMI Florida      | 

The Mighty KBC transmits to North America Sundays at
0000-0200 UTC (Saturday 8-10 EDT) on 5960 kHz, via Germany. A minute of
MFSK64 is at about 0130 UTC.  Reports to Eric: . See also and

“This is a Music Show”  Most of the show is a music
show, but the host transmits some MFSK text and image near the end of
the broadcast. It’s transmitted on WRMI, Thursdays at 0200-0300 UTC on
5850 kHz (Wednesday evening in the Americas) and a new time also on
WRMI, Wednesdays at 2100-2200 UTC on 7780 kHz (aimed towards Europe) .
Also look for a waterfall ID at the beginning of the show. .

New York and Pennsylvania NBEMS nets. Most weekends, as
KD9XB, I check in to the New York NBEMS (Narrow Band Emergency
Messaging Software) net Saturday at 1200 UTC on 3584 kHz USB, and the
Pennsylvania NBEMS net Sunday at 1200 UTC on 3583 kHz USB (with
out-of-state check-ins now starting at 1130 UTC). Check-ins are usually
in Thor 22, and messages are in MFSK32. Messages generally use the Flmsg
add-on to Fldigi. If you are a radio amateur in eastern North America,
feel free to check in. Outside the region, use an SDR in the eastern USA
to tune in and decode. You do not need Flmsg to check in, and most of
the messages can be read without Flmsg. If you can decode the net, send
me an email to , or tweet to @SWRadiogram , and I
will let them know you are tuned in. USEast NBEMS Net: Please also note the USEast NBEMS Net, Wednesdays 2300 UTC (7 pm EDT) on 3536 kHz USB.


Bobby in Louisiana, using an SDR in Texas, shows us the test pattern
comparison, and other images, 26 September 2020, 0230-0300 UTC, 9265
kHz from WINB Pennsylvania …


Fuente: Shortwave Radiogram, 1-4  October 2020: Digital modes that will get to Mars before the next rover


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