Thursday, June 01, 2023

Shortwave Radiogram schedules


Hello friends:

This weekend on Shortwave Radiogram, we will experiment with three flavors of MFSK: MFSK16 (60 wpm), MFSK32 (120 wpm) and MFSK64. We use MFSK32 and MFSK64 most weeks. MFSK16 is slow, but it is often successful in poor reception conditions.

Bad reception can actually be useful this weekend, because it allows us to test the limits of MFSK16. One caution about MFSK16 is that the audio frequency must be tuned precisely. Generally, the RSID will set your Fldigi or TIVAR/Andflmsg to the correct audio frequency. If that does not work, adjust the audio frequency until a successful decode is achieved.

In addition to comparing the text decoding performance of the three MFSK modes, we will also send the same image three times, once each in MFSK64, MFSK32 and MFSK16. You will notice that the image takes about the same amount of time to transmit in all the modes. The resolution of the images will differ, however:
MFSK64 will be the most crisp, but also susceptible to interference lines.
MFSK16 will be fuzzier but less degraded by interference.

Here is the image in "studio" quality ...

Here is the lineup for Shortwave Radiogram, program 307, 1-6 June 2023, in MFSK modes as noted:

 1:40 MFSK32: Program preview
 3:08 MFSK16: Batteries, EVs and the environment
 7:39 MFSK32: Batteries article continues
10:18 MFSK64: Batteries article continues
12:59 MFSK64: Image of Crimson Rosella (parrot)
14:40 MFSK32: Same image of Crimson Rosella
16:44 MFSK16: Same image of Crimson Rosella
19:16 MFSK64: This week's images
28:35 MFSK32: Closing announcements

A video of last weekend's Shortwave Radiogram (program 297)  is provided by Scott in Ontario (Friday 1300 UTC). The audio archive is maintained by Mark in the UK. The analysis is prepared by Roger in Germany.

Please send reception reports to
Twitter: @SWRadiogram or (visit during the weekend to see listeners' results)

Shortwave Radiogram Transmission Schedule
UTC Day UTC Time Frequency Transmitter
Friday 0530-0600 7780 kHz WRMI Florida
Friday 1300-1330 15770 kHz WRMI Florida
Friday 1400-1430 15735 kHz DRM WINB Pennsylvania
Saturday 0230-0300 9265 kHz WINB Pennsylvania
Saturday 2300-2330 7570 kHz WRMI Florida
Monday 0800-0830 5850 kHz WRMI Florida
Tuesday 1430-1500 9955 kHz WRMI Florida

The Mighty KBC has expanded its transmission schedule. Times are UTC, frequencies are kHz, all from WRMI Florida:
Sunday 0000-0100: Dave Mason 9455
Sunday 0100-0200: Eric van Willegen 9455
Sunday 0200-0300: Eric van Willegen 5850
Sunday 2100-2200: Dave Mason 5950
Sunday 2200-2300: Eric van Willegen 5950
Wednesday 1600-1700: Eric van Willegen 15770
Friday 1100-1200: Eric van Willegen 15770
Saturday 0200-0300: Dave Mason 5850
Saturday 0800-0900: Eric van Willegen 7780
A minute of MFSK64 is at about 30 minutes past the hour on at least some of the Eric van Willigen programs.  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-64 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). Also look for a waterfall ID at the beginning of the show.    @ThisIsAMusicSho

Pop Shop Radio from British Columbia, Canada, includes "a whole variety of pop music, such as records from the 1960s and 1970s that were played on Top-40 radio stations not only in North America but also on offshore radio and stations like Radio Luxembourg." The programs now include some MFSK text and an image. Website: Twitter: @popshopradio1  Email:

Thanks for your reception reports!

Kim Andrew Elliott, KD9XB
Producer and Presenter
Shortwave Radiogram
Reporting on international broadcasting at