Shortwave Radiogram, 3-6 September 2020: Brought to you by the color blue


This weekend (5-6 September), The Mighty KBC moves to its winter frequency of 5960 kHz
(replacing 9925 kHz), for its transmission from Nauen, Germany to North America, Sunday 0000-0200 UTC (Saturday 8-10 pm EDT). A minute of MFSK64 is at 0130 UTC.

This past weekend, the Sunday 2330 UTC Shortwave Radiogram transmission
had a surprise: a signal on 15770 kHz as well as the usual 7780 kHz. I
have not heard back yet from Jeff White at WRMI as to whether 15770 will
continue, or if it was a one-time-only transmission.  Try it this
weekend.  It might improve reception in western North America, where
7780 is usually difficult to hear.

Also this  past weekend, our experiment with Thor 100 (352 wpm, 1800 Hz
bandwidth) was more successful than I expected. There were 100% decodes
of the text across the Atlantic and the Pacific, and in many places in
North America. Thor 100 did show some errors in difficult conditions,
especially deep fades, situations in which MFSK64 and especially MFSK32
were more successful. You can see the Thor 100 text decoding – and use
the audio to decode it yourself – from this video provided by youngalientype in (I think) Ohio.

Videos of last weekend’s Shortwave Radiogram (program 167) are provided by Scott in Ontario (Saturday 1330 UTC) and Ralf in Germany (Sunday 2330 UTC). The audio archive is maintained by Mark in the UK. Analysis is prepared by Roger in Germany.

This weekend’s broadcast will be mostly images: sixteen MFSK64 photos, designs, and a painting all featuring the color blue.

Here is the lineup for Shortwave Radiogram, program 168,  3-6 September 2020: Program preview and closing announcements in MFSK32. All of the images in MFSK64.

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(+15770?)kHz | WRMI Florida      

The Mighty KBC transmits to North America Sundays at 0000-0200 UTC (Saturday 8-10 EDT) on new 5960 kHz, via Germany. A minute of MFSK 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.


Kapazitätsdiode in Germany received these images 30 August 2020 at 2330-2400 UTC on 7780 kHz from WRMI Florida …


Fuente: Shortwave Radiogram, 3-6 September 2020: Brought to you by the color blue


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