Shortwave Radiogram, 6-9 August 2020: Supersonic exotic modes


During last weekend’s Shortwave Radiogram, there were several examples of the MFSK16 text successfully decoding under difficult conditions. You can decode from this reception in Russia on 15770 kHz from WRMI Florida. See also my tweet about decoding the MFSK16 via an SDR in the Philippines.

Inspired by recent text mode experiments by Peter John on The Mighty KBC, this weekend Shortwave Radiogram includes brief segments in Hell 80 and 32xPSK63R.
The RSID should switch your Fldigi software to the correct mode, but if
a manual mode change is necessary, the 32xPSK63R can be found here: Op
Mode > PSKR > MultiCarrier. The 32xPSK63R mode is very wide (220
to 2888 Hz) and very fast (1760 wpm). As a phase-shifted mode, 32xPSK63R
probably works better in SSB than in AM. On the other hand, you might
need AM to accommodate its wide bandwidth. If you can, try receiving and
decoding in both SSB and AM.

Videos of last weekend’s Shortwave Radiogram (program 163) are provided by Scott in Ontario and Frigid RF in Virginia (both Friday 1300 UTC). The audio archive is maintained by Mark in the UK. Analysis is prepared by Roger in Germany – with special attention to his experiment involving the art of the week.

This weekend’s show is in the usual MFSK32 and MFSK64, with nine MFSK images, plus the segments in Hell 80 and 32xPSK63R.

Here is the lineup for Shortwave Radiogram, program 164,  6-9 August 2020, in modes as noted:

1:47  MFSK32: Program preview
3:00  Virgin Galactic plans Supersonic commercial aircraft*
7:15  Hell 80: Contact information
8:17  MFSK64: Trial of commercial long-range wireless power*
13:57  This week’s images*
27:35  32xPSK63R**: Contact information
27:44  MFSK32: Closing announcements

* with image(s)
** Under PSKR > MultiCarrier

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 9925 kHz, via Germany. A minute of
MFSK is at about 0130 UTC.  Look for text modes under Peter John’s DX
Headlines between 0130-0200 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.


Zach in Alabama received nearly perfect images despite an “unusually weak signal” from WRMI on 5850 kHz,  2 August 2020, 0800-0830 UTC …


Fuente: Shortwave Radiogram, 6-9 August 2020: Supersonic exotic modes


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