Shortwave Radiogram, 5-8 December 2019

Shortwave Radiogram

propagation – nearing the winter solstice in the northern hemisphere – has resulted in interesting reception in many parts of the world. The Sunday 0800-0830 broadcast is now almost routinely received in Europe, more likely on 5850 kHz which is beamed in that direction from WRMI Florida, rather than 7730 kHz which is directed more towards western North America and the Pacific. Reception of this broadcast is also now possible in Japan, with both 5850 and 7730 worth trying.

Even if the images are fuzzy or can’t be decoded at all, the text might be largely successful, especially the slower MFSK mode. It is helpful if you estimate what percentage of the text characters decoded correctly, in your reports via email and to the Twitter account @SWRadiogram .

Speaking of reports, during the past week, I received the first reception report to Shortwave Radiogram from a cruise ship. It was from Jake aboard Holland America’s MS Rotterdam, off the Pacific Coast of Central America. A few years ago I received and decoded VOA Radiogram on another Holland America ship, in the Caribbean, out on our stateroom’s balcony, in heavy seas, with occasional saltwater spray.

Videos of last weekend’s Shortwave Radiogram (program 128) are provided by Scott in Ontario (Sunday 0800 UTC on 5850 kHz), Jeff in Oklahoma and HFZone (location unknown) (both 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 nine images.

Here is the lineup for Shortwave Radiogram, program 129, 5-9 December 2019, in MFSK modes as noted:

1:44 MFSK32: Program preview

2:55 Canadian Coast Guard completes 2019 Arctic operations*

9:04 MFSK64: Satellite accidentally captures comet outburst*

13:18 Businesses need to rethink where they put cell towers*

17:49 This week’s images

28:10 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 Transmission Schedule           |
| UTC Day  | UTC Time      | Frequency     | Transmitter site    |
| Friday   | 0030-0100 UTC | 9265 kHz      | WINB Pennsylvania   |
| Friday   | 1300-1330 UTC | 15770 kHz     | WRMI Florida        |
| Friday   | 1500-1530 UTC | 13690 kHz DRM*| WINB Pennsylvania   |
| Saturday | 0330-0400 UTC | 9265 kHz      | WINB Pennsylvania   |
| Sunday   | 0800-0830 UTC | 5850 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 7-9 EST) on 5960 kHz, via Germany. A minute of
MFSK is at about 0130 UTC.  Reports to Eric: . See also and

“This is a Music Show” is the newest addition to
digital modes via analog shortwave. 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 0100-0200 UTC on 5850
kHz and 0130-0230 UTC on 9395 kHz (Wednesday evening in the Americas).
Also look for a waterfall ID at the beginning of the show. . @ThisIsAMusicSho

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 1300 UTC on 3584 kHz USB, and the
Pennsylvania NBEMS net Sunday at 1300 UTC on 3583 kHz USB (with
out-of-state check-ins now starting at 1230 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, Thursdays at 0000 UTC (Wednesdays 7 pm EST) on 3536 kHz USB.

Ralf in Germany received these images, MFSK32 text with no errors,
and MFSK64 text with only a few errors, 1 December 2019, 2330-2400 UTC,
7780 kHz from WRMI Florida …  


Fuente: Shortwave Radiogram, 5-8 December 2019: Digital modes impervious to any comet outburst


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