Shortwave Radiogram, 25 al 28 de Marzo 2021, programa 197

 This Sunday, 28 March, begins the change of clocks to summer time in most of Europe. Because our transmissions on Sunday remain at the same UTC time, most European listeners will hear them one hour later by local time.

Shortwave broadcast stations will also begin their A21 frequency season on Sunday, 28 March. The only Shortwave Radiogram frequency to change will be the WINB DRM transmission, 26 March at 1500-1530 UTC on 13655 kHz but on new 15750 kHz starting  2 April.

Last week’s experiments with Flmsg were generally successful. (See, and expand the size of, Roger’s compilation.) The reception of fully formatted web pages across oceans was a dramatic touch. Some listeners think that plain text is a better idea on shortwave, because difficult reception can make formatting codes go bad. Let me know your preferences.

A video of last weekend’s Shortwave Radiogram (program 196) is provided by Scott in Ontario (Friday 1300 UTC). A segment of reception on Japan (Sunday 0800 UTC on 5850 kHz) was recorded by kurama10goo. The audio archive is maintained by Mark in the UK. Analysis (showing all the Flmsg content) is prepared by Roger in Germany.

This weekend the program will contain one Flmsg item: a plain text form. If you have not set up Flmsg, see instructions in last week’s email or this web page from If you do not have Flmsg, you will still be able to see the content as text in the Fldigi receive pane. Most of the program will be non-Flmsg text.

Here is the lineup for Shortwave Radiogram, program 197, 25-28 March 2021, in MFSK modes as noted:

  1:52  MFSK32: Program preview
  3:00  Shortwave Radiogram schedule information**
  5:38  Atomic clocks bring more precise time measurement
  9:05  MFSK64: ESA mission to test sat-nav in lunar orbit*
13:40  This week’s images*
27:35  MFSK32: Closing announcements

* with image

** Flmsg plain text form (ignore any checksum error)

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   | 0030-0100 UTC | 9265 kHz         | WINB Pennsylvania |
| Friday   | 1300-1330 UTC | 15770 kHz        | WRMI Florida      |
| Friday   | 1500-1530 UTC | 13655 kHz DRM    | WINB Pennsylvania |
| Saturday | 0100-0130 UTC | 9955 kHz         | WRMI Florida      |
| Saturday | 0330-0400 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 7-9 pm EST) on 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. . @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 1300 UTC on 3584 kHz USB, and the Pennsylvania NBEMS net Sunday at 1230 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, Thursdays 0000 UTC (Wednesdays 7 pm EST) on 3536 kHz USB.

Thanks for your reception reports!


Kim Andrew Elliott, KD9XB

Producer and Presenter

Shortwave Radiogram

Philippe near Paris received these Flmsg items and images, 20 March 2021, 1330-1400 UTC, on 15770 kHz from WRMI Florida …




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