Shortwave Radiogram, 29-31 March 2019

Shortwave Radiogram

Slow Scan Radio has been transmitting two streams of text
simultaneously. We have tried this a few times on VOA/Shortwave
Radiogram, and will try it again this weekend.

Near the end the half hour will be a simultaneous transmission of a news
item from in two languages, both in MFSK32, with the
English version centered on 1500 Hz and the Spanish version centered on
2200 Hz.

Why 2200Hz? The “primary” MFSK32 occupies audio spectrum approximately
from 1250 to 1750 Hz. This sometimes results in an audio harmonic from
2500 to 3500 Hz. MFSK32 at a 2200 Hz center frequency occupies 1950 to
2450 Hz, placing it above the primary MFSK32 but below the harmonic.

One way to decode both is to run two instances of Fldigi, one with the
RxID turned on, and the other with the RxID turned off. For the second
instance, manually adjust the audio frequency using the ten-second
tuning tone.

Another method, requiring only one instance of Fldigi, is to record the
broadcast of Shortwave Radiogram, and decode the 2200 Hz text from the

This simultaneous transmission  begins at 25:02 into the half-hour broadcast.

Last week’s Thor 50×1 performed well, especially for its speed, but not
as well as MFSK32, and sometimes even not as well as the faster MFSK64. I
was able to test this during the Sunday 0800 UTC broadcast using an SDR
in Japan tuned to 5850 kHz. This is one time of the year that the
Sunday 0800 UTC show has a better than usual chance of successful
reception and decode.

Videos of last weekend’s Shortwave Radiogram (program 92) are provided by Scott in Ontario (Friday 2030 UTC), Ralf in Germany (Saturday 1400 UTC), and “youngalientype” in Alabama (Sunday 2330 UTC Thor50x1 segment). The audio archive is maintained by Mark in the UK. Analysis is prepared by Roger in Germany.

Here is the lineup for Shortwave Radiogram, program 93, 29-31 March 2019, in MFSK modes as noted:

1:47  MFSK32: Program preview
4:05  SSTV transmissions from the ISS on 1-2 April
5:49  MFSK64: Improved design for lithium-sulfur batteries*
10:15  Images of the week*
24:56  MFSK32: Swiss worry about 5G antenna health effects**
28:27  Closing announcements

* with image(s)

** simultaneous English and Spanish, as discussed above

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   | 1500-1530 UTC | 13755 kHz DRM*| WINB Pennsylvania   |
| Friday   | 2030-2100 UTC | 7780 kHz      | WRMI Florida        |
| Saturday | 0230-0300 UTC | 9265 kHz      | WINB Pennsylvania   |
| Saturday | 1400-1430 UTC | 9400 kHz      | Space Line Bulgaria |
| Sunday   | 0800-0830 UTC | 5850 7730 kHz | WRMI Florida        |             |
| Sunday   | 2330-2400 UTC | 7780 kHz      | WRMI Florida        |

Slow Scan Radio transmits SSTV images and text modes
Saturdays at 1300-1330 UTC on 6070 kHz and 7440 kHz via Channel 292 in
Germany. Also Saturday 1730-1800 UTC on 9265 kHz via WINB Pennsylvania.
The website is Reception reports to

The Mighty KBC transmits to Europe Saturdays at
1300-1400 UTC on 11600 kHz from Bulgaria, with the minute of MFSK at
about 1330 UTC (if you are outside of Europe, listen via ). And to North America Sundays at 0000-0200
UTC (Saturday 7-9 pm EST) on 5960 kHz, via Germany. The 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, 5850 kHz, Thursday 0100-0200 UTC
(Wednesday evening in the Americas). Also look for a waterfall ID at the
beginning of the show.

Franco, HB9OAB, is transmitting digital SSTV in the KG-STV
format via WINB (Pennsylvania) analog, Saturdays 2200-2215 UTC, 9265
kHz. Best reception will be via receivers in the western USA.

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 in Thor
22 (or maybe IFKP), and messages are in MFSK32 (PA NBEMS is
experimenting with Thor 50×1 for messages). Messages usually 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.

Images received by Merkouris in Greece, 24 March 2019, 2330-2400 UTC, 7780 kHz from WRMI Florida

Fuente:Shortwave Radiogram, 29-31 March 2019


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