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Shortwave Radiogram, 29-31 March 2019

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 swissinfo.ch 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 recording.

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.

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 radiogram@verizon.net

And visit http://swradiogram.net

Twitter: @SWRadiogram or https://twitter.com/swradiogram (visit during the weekend to see listeners’ results)

Facebook group: https://www.facebook.com/groups/567099476753304

Shortwave Radiogram Transmission Schedule
UTC Day UTC Time Frequency Transmitter
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 kHz
7730 kHz
WRMI Florida
Sunday 2330-2400 UTC 7780 kHz

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 http://www.slowscanradio.com. Reception reports to x@xdv.me.

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 websdr.ewi.utwente.nl:8901/ ). 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: themightykbc@gmail.com . See also http://www.kbcradio.eu/ andhttps://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, 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 radiogram@verizon.net , or tweet to @SWRadiogram , and I will let them know you are tuned in.

 
Thanks for your reception reports!

Kim Andrew Elliott, KD9XB
Producer and Presenter
Shortwave Radiogram

Reporting on international broadcasting at https://twitter.com/kaedotcom

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