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Shortwave Radiogram, 9-12 April 2020: Transmitting digital modes, not viruses

Por elradioescucha el 09/04/2020 • ( 0 )

Last weekend, it was, as usual, difficult to find a Shortwave Radiogram signal bad enough to provide a good test for our slow modes: Olivia 64-2000 and MFSK16. There were, however, a few instances of Olivia 64-2000 succeeding where the other modes, and the voice introduction, failed. You can decode from this example received in South Australia.

Videos of last weekend’s Shortwave Radiogram (program 146) are provided by Lolo sdr in Spain (Friday 1300 UTC), 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.

To keep us busy during COVID-19 stay-at-home requirements, we will try
another Olivia mode this weekend: Olivia 32-2000 – 32 tones, 2000 Hertz
wide. In the Olivia modes, as the number of tones increases, the speed
of the mode in words-per-minute decreases. As the bandwidth increases,
the speed also increases. With half the tones, Olivia 32-2000 is about
twice as fast as last weekend’s Olivia 64-2000. How will Olivia 32-2000
compare with Olivia 64-2000 in robustness?

This weekend’s show also includes the usual MFSK32 and MFSK64, with nine MFSK64 images.

Here is the lineup for Shortwave Radiogram, program 147, 9-12 April 2020, in modes as noted:

1:46 MFSK32: Program preview
3:15 Olivia 32-2000: New insights into Saturn’s atmosphere**
9:16 MFSK64: Turkmenistan marks World Health Day*
12:39 Boeing’s Starliner spacecraft will try again*
15:49 This week’s images*
28:04 MFSK32: Closing announcements

* with image(s)

** Turn Fldigi squelch (SQL) off. If RSID does not change the
mode, use Op Mode > Olivia > Custom > Bandwidth 2000, Tones 32.
Or create an Fldigi macro: <@GOFREQ:1500> <MODEM:OLIVIA:2000:32>
(You might need to fine-tune the audio frequency after the
Olivia 32-2000 begins.)

| 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
MFSK is at about 0130 UTC. Reports to Eric: themightykbc@gmail.com . See also http://www.kbcradio.eu/ and https://www.facebook.com/TheMightyKbc/.

“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 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.
thisisamusicshow@gmail.com . www.twitter.com/ThisIsAMusicSho/
@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 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 radiogram@verizon.net , 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.

Images from WINB Pennsylvania received by Johnny in Texas on 9265 kHz 2 April 2020 at 2330-2400 UTC. Using an Airspy HF+ and 440ft longwire antenna …