Shortwave Radiogram transmits digital text and images on an analog shortwave broadcast transmitter. The program is produced and presented by Dr. Kim Andrew Elliott.

For the current Shortwave Radiogram transmission schedule, see the most recent post at this website.


See listeners' results at swradiogram.bsky.social


Please send comments and reception reports to radiogram@verizon.net


To decode the digital text and images transmitted on Shortwave Radiogram, most listeners use Fldigi for PCs or the TIVAR app for Android devices.

    • rss
    • archive
    • radiogram@verizon.net
    • Shortwave Radiogram, 13-18 December 2024 (program 381): Mathematician solves problem of decoding MFSK on a moving sofa

      I hope the holidays of December are unfolding well for you. Activities in our house might result in repeat broadcasts at the end of December, or early January. I will let you know.

      Here in the Washington DC area, pirate shortwave broadcasters have been active in their usual 6900-7000 kHz neighborhood. They’ve been audible even during the daylight hours, indicating that they are not far away. One of the stations, in a synthesized voice, informed listeners that it is transmitting in C-QUAM stereo. It advised using the QAM mode on KiwiSDR receivers. I did that, and indeed it was stereo. It was a weird sort of stereo, wavering quickly between left and right channel. But interesting to listen to.

      A video of last week’s Shortwave Radiogram (program 380) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 381, 13-18 December 2024, in MFSK modes as noted:

       1:43  MFSK32: Program preview
       2:53  MFSK32: Mathematician solves the moving sofa problem*
       7:48  MFSK64: Are buildings made of wood sustainable?
      13:16  MFSK64: This week’s images*
      27:52  MFSK32: Closing announcements

      * with image(s)

      Please send reception reports to radiogram@verizon.net

      And visit http://swradiogram.net

      Bluesky: swradiogram.bsky.social

      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      mutantspore.bsky.social in Florida (near Tampa) received these images 6 December 2024, 0030-0100 UTC, 9265 kHz from WINB Pennsylvania …

      image
      • 3 days ago
      • #shortwave
      • #digimodes
    • Shortwave Radiogram, 6-11 December 2024 (program 370): Using Android devices to study the ionosphere, and then to decode our MFSK

      Thank you for your patience during the repeat broadcasts of Program 379. Thanksgiving week was busy with writing deadlines, appointments and a few holiday activities, so I needed a break from producing the show.

      A reminder that Shortwave Radiogram is now on Bluesky at swradiogram.bsky.social. You do not need a Bluesky account to read what is posted there. Shortwave Radiogram on X/Twitter also continues at @SWRadiogram. Maintaining both Bluesky and X accounts is rather time consuming, so eventually I’ll have to settle on one. 

      A video of the previous Shortwave Radiogram (program 379) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 370, 6-11 December 2024, in MFSK modes as noted:

       1:42  MFSK32: Program preview
       2:48  MFSK32: BepiColombo spacecraft flies by Mercury again
       6:16  MFSK64: Using smartphones to study the ionosphere
      10:14  MFSK64: This week’s images
      27:58  MFSK32: Closing announcements

      Please send reception reports to radiogram@verizon.net

      And visit http://swradiogram.net

      Bluesky: swradiogram.bsky.social

      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      THE SHORTWAVE RADIOGRAM TRANSMISSION SCHEDULE IS IN THE IMAGE BELOW.
      IF THE SCHEDULE IS NOT VISIBLE FULL WIDTH, CLICK ON IT
      .

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      C M Curtin @KD8TTE in Ohio received these images 4 December 2024, 1330-1400 UTC, 15770 kHz from WRMI Florida …

      image
      • 1 week ago
      • #shortwave
      • #digimodes
    • Shortwave Radiogram, 22 November-4 December 2024 (program 379): Digital modes that do not depend on undersea data cables

      PROGRAM 379 WILL BE REPEATED FOR ANOTHER WEEK: 29 NOVEMBER-4 DECEMBER 2024.

      I’ve had a few inquiries about where the Shortwave Radiogram X/Twitter account @SWRadiogram will move to Bluesky, as many other X users are now doing.

      The @SWRadiogram X/Twitter is task oriented and generally non-political. Shortwave Radiogram listeners use it to report their decodes, and repost these to the over 4000 followers. The account has largely escaped many of the quirks and “features” of X under its present ownership. With such a great community of friends making good use of @SWRadiogram, I am not under much pressure to migrate.

      Nevertheless, I have an swradiogram.bsky.social account, online but so far inactive, ready to deploy if necessary. Let me know your thoughts.

      Also, kaedotcom.bsky.social, reporting on international broadcasting, eventually to replace @kaedotcom.

      My mediafreedomusa.bsky.social  is up and running, reporting on “attempts to restrict and to protect media freedom in the United States during the second Trump administration.” At this point, it links to articles speculating what will happen after January 20. After Trump’s inauguration, it will be more interesting, reporting on what the Trump Administration actually does, and what news outlets, journalists and press freedom advocates do to resist. It will be quite a scrum.

      Three X or Bluesky accounts are the limit for my old brain.    

      A video of last week’s Shortwave Radiogram (program 378) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 379, 22-27 November 2024, in MFSK modes as noted:

       1:45  MFSK32: Program preview
       2:53  MFSK32: Social platform Bluesky welcomes X users
       7:29  MFSK64: Germany assumes sabotage after data cable damaged*
      10:44  MFSK64: This week’s images*
      27:33  MFSK32: Closing announcements

      * with images

      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      THE SHORTWAVE RADIOGRAM TRANSMISSION SCHEDULE IS IN THE IMAGE BELOW.
      IF THE SCHEDULE IS NOT VISIBLE FULL WIDTH, CLICK O
      N IT.

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      C M Curtin @KD8TTE in Ohio received these images 18 November 2024, 0800-0830 UTC, 5850 kHz from WRMI Florida ….

      image
      • 3 weeks ago
      • 3 notes
      • #shortwave
      • #digimodes
    • Shortwave Radiogram, 15-20 November 2024 (program 378): Digital modes tuned by an oboe playing the note A (440 Hz).

      As we approach the second Trump administration, the future of shortwave becomes a topic of some interest to the politico-bureaucratic world, and of much interest to us in the Shortwave Radiogram community. Project 2025, widely considered to be a blueprint for the next administration, discusses the importance of shortwave for the US Agency for Global Media (USAGM), even as newer media become more prominent. Maybe USAGM shortwave sites will be preserved, for now.

      I believe that shortwave broadcasting in the other direction – from other countries to the USA – could also become more important during the Trump administration. I’ve written an article explaining this, but, so far, no publication is interested in using it. Apparently, mention shortwave, and the author is dismissed as a crackpot.

      Now that the fall time change has taken hold, please note in the schedule below that most of our transmissions stay with their UTC times, but some have stayed with local time at the transmitter site, this changing the UTC time. And make the conversion from UTC to your local time is correct. (Saturday at 2300-2330 UTC, if you don’t hear Shortwave Radiogram on 7780 kHz, try the former 7570 kHz frequency, which might be repaired by this weekend.)

      A video of last week’s Shortwave Radiogram (program 377) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 378, 15-20 November 2024, in MFSK modes as noted:

       1:37  MFSK32: Program preview
       2:44  MFSK32: Antimatter can travel by truck
       5:28  MFSK64: Why is the oboe used to tune an orchestra?*
      11:51  MFSK64: This week’s images*
      28:02  MFSK32: Closing announcements

      * with image(s)

      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      THE SHORTWAVE RADIOGRAM TRANSMISSION SCHEDULE IS IN THE IMAGE BELOW.
      IF THE SCHEDULE IS NOT VISIBLE FULL WIDTH, CLICK ON
      IT.

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      PopShopRadio in British Columbia received this text and these images 9 November 2024, 0330-0400 UTC, 9265 kHz from WINB Pennsylvania …

      image
      • 1 month ago
      • 1 notes
      • #shortwave
      • #digimodes
    • Shortwave Radiogram, 8-13 November 2024 (program 377): Audible in that slim skyscraper.

      All the changes to the Shortwave Radiogram schedule due to the fall time shift are now complete. WINB’s 9265 kHz stays with Eastern Time, so Shortwave Radiogram  on 9265 kHz is now one hour later by UTC – same local time in most of North America and Europe. The new schedule is listed below.

      A video of last week’s Shortwave Radiogram (program 376) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 377, 8-13 November 2024, in MFSK modes as noted:

       1:43  MFSK32: Program preview (now)
       2:52  MFSK32: Slim Dubai skyscraper just one apartment wide*
       7:55  MFSK64: Laser communications for historic moon flyby
      13:10  MFSK64: This week’s images*
      28:39  MFSK32: Closing announcements

      * with image

      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      THE SHORTWAVE RADIOGRAM TRANSMISSION SCHEDULE IS IN THE IMAGE BELOW.
      IF THE SCHEDULE IS NOT VISIBLE FULL WIDTH, CLICK ON I
      T.

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      Zach in Alabama received these images 31 October 2024, 2330-2400 UTC, 9265 kHz from WINB Pennsylvania …

      image
      • 1 month ago
      • #shortwave
      • #digimodes
    • Shortwave Radiogram, 31 October-6 November 2024 (program 376): Digital modes absorbed by that ultra-thin film

      Thank you for allowing me the repeat broadcast of program 375 last week. It gave me time for some appointments and to finish some writing projects.

      WRMI is still repairing some antenna facilities damaged by Hurricane Milton. Because of this, the Shortwave Radiogram transmission Saturday at 2300-2330 UTC is now on 7780 kHz – replacing 7570 kHz for the time being. The schedule below reflects this change.  

      Also, most of North America shifts back from Daylight Time to Standard Time on November 3. The only WRMI frequency used by Shortwave Radiogram that stays with Eastern Time is 9955 kHz. So, as of this Sunday, Shortwave Radiogram on 9955 kHz is at 1530-1600 UTC, shifting from 1430-1500 UTC. (It’s still 10:30-11 am Eastern Time.) This is also included in the schedule below.

      WINB’s schedule on 9265 kHz also stays with Eastern Time, so those UTC times for Shortwave Radiogram will shift next week.

      A video of the previous Shortwave Radiogram (program 375) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 376, 31 October-6 November 2024, in MFSK modes as noted:

       1:43  MFSK32: Program preview
       2:51  MFSK32: Daylight saving time linked to lost productivity
       8:01  MFSK64: Ultra-thin film absorbs electromagnetic waves*
      12:37  MFSK64: This week’s images*
      28:27  MFSK32: Closing announcements

      * with image
       
      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      THE SHORTWAVE RADIOGRAM TRANSMISSION SCHEDULE IS IN THE IMAGE BELOW.
      IF THE SCHEDULE IS NOT VISIBLE FULL WIDTH, CLICK ON IT
      .

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      Ciro in Italy received these images 19 October 2024, 0230-0300 UTC, 9265 kHz from WRMI Florida …

      image
      • 1 month ago
      • 1 notes
      • #shortwave
      • #digimodes
    • Shortwave Radiogram, 24-30 October 2024 (program 375 repeated).

      Because of appointments and meetings, we are repeating last week’s program 375 this week.

      The content below in this email is basically the same as last week – except trying a new rtf format for the transmission schedule …

      A video of the this week’s Shortwave Radiogram (program 375) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis of program 375 is provided by Roger in Germany.

      **Here is the lineup for Shortwave Radiogram, program 375 **(repeat), 24-30 October 2024, in MFSK modes as noted:

       1:42 MFSK32: Program preview

       2:55 MFSK32: Chickpeas may be key crop for future food security

       8:22 MFSK64: Mild habanero peppers: flavor without the heat*

      13:21 MFSK64: This week’s images*

      27:28 MFSK32: Closing announcements

      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      Thanks for your reception reports!

      Kim

      Kim Andrew Elliott, KD9XB

      Producer and Presenter

      Shortwave Radiogram

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

      • 1 month ago
      • #shortwave
      • #digimodes
    • Shortwave Radiogram, 17-23 October 2023 (program 375): Chickpeas and habaneros

      WRMI is still making repairs after Hurricane Milton, but the WRMI frequencies used for Shortwave Radiogram have been restored.  During the past week, 7570 kHz was off the air Saturday at 2300 UTC. And 5850 kHz was temporarily replaced by 7730 kHz. These frequencies are now back to normal.

      Because of the minimal disruption last week, I have produced a new show (375) for this week. However, program 375 will be repeated next week (October 24-30) due to family activities.

      The last Sunday of October will be the beginning of the B24 HF (shortwave) frequency season. Some shortwave broadcast stations will make seasonal frequency changes. I am not aware of any planned changes of frequencies used for Shortwave Radiogram on WRMI and WINB, but be alert for any unexpected changes.

      Most of Europe will turn clocks back one hour on that same last Sunday of October. Most of North America will do the same one week later, November 2. The schedule for Shortwave Radiogram via WRMI will stay with UTC, except for 9955 kHz, which stays with US Eastern time. WINB’s 9265 kHz will stay with US Eastern time. I will provide an updated schedule at the end of October.

      A video of last week’s Shortwave Radiogram (program 374) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 375, 17-24 October 2024, in MFSK modes as noted:

       1:42  MFSK32: Program preview
       2:55  MFSK32: Chickpeas may be key crop for future food security
       8:22  MFSK64: Mild habanero peppers: flavor without the heat*
      13:21  MFSK64: This week’s images*
      27:28  MFSK32: Closing announcements

      * with image(s)
       
      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      Shortwave Radiogram Transmission Schedule UTC Day UTC Time Frequency kHz Transmitter Thursday 2330-2400 9265 WINB Pennsylvania Friday 0530-0600 7780 WRMI Florida Saturday 0230-0300 9265 WINB Pennsylvania Saturday 2300-2330 7570 WRMI Florida Sunday 1430-1500 9955 WRMI Florida Monday 0800-0830 5850 WRMI Florida Wednesday 1330-1400 15770 WRMI Florida

      The Shortwave Radiogram transmission schedule is in the image below. Click on the image to see the full width …

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      Zach in Alabama received these images 12 October 2024, 0230-0300 UTC, 9265 kHz from WINB Pennsylvania …

      image
      • 1 month ago
      • 2 notes
      • #shortwave
      • #digimodes
    • Shortwave Radiogram, 10-16 October 2024 (program 374): Digital modes that survive hurricanes

      WRMI in Florida reports that its power has been restored after Hurricane Milton passed through. But there is some damage in its antenna field. We can expect that at least some of the Shortwave Radiogram transmissions via WRMI will not be on the air this week. I prepared a new program (374) for this week, but will probably repeat it next week because of the missed WRMI broadcasts.

      If you were affected by storm Milton, and storm Helene before it, I hope things get back to normal as quickly as possible, Milton passed directly over my sister and nephew near Lakeland, Florida. I have not heard from them, but I assume they are without electricity, internet and cell for the time being.

      A video of last week’s Shortwave Radiogram (program 373) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 374, 10-16 October 2024, in MFSK modes as noted:

       1:48  MFSK32: Program preview
       2:53  MFSK32: Small turbines can capture wasted energy
       6:50  MFSK64: Desalination system runs with sun’s rhythms
      13:32  MFSK64: This week’s images
      27:31  MFSK32: Closing announcements

      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      The Shortwave Radiogram transmission schedule is in the image below. Click on the image to see the full width …

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      Pop Shop Radio received these images 7 October 2024, 0800-0830 UTC, 5850 kHz from WRMI Florida …


      image
      • 2 months ago
    • Shortwave Radiogram, 3-9 October 2024 (program 373): Digital modes that increase the capacity of LEO satellites

      I hope any of you impacted by Hurricane Helene and associated weather systems are recovering in good time. The storm and its aftermath certainly reminded the nation of the usefulness of radio, both for broadcasting and for communication.

      A video of last week’s Shortwave Radiogram (program 372) is provided by Scott in Ontario (Wednesday 1330 UTC). The audio archive is maintained by Mark in the UK. Analysis is provided by Roger in Germany.

      Here is the lineup for Shortwave Radiogram, program 373, 3-9 October 2024, in MFSK modes as noted:

       1:47  MFSK32: Program preview
       3:03  MFSK32: SS United States to Become Artificial Reef*
       8:44  MFSK64: Technique to increase capacity of LEO satellites
      12:39  MFSK64: This week’s images*
      28:39  MFSK32: Closing announcements
      * with image(s)

      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 Gateway Wiki: https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway

      The Shortwave Radiogram transmission schedule is in the image below. Click on the image to see the full width …

      image

      Other Shortwave broadcast programs that include digital text and images include The Mighty KBC, Pop Shop Radio and Radio North Europe International (RNEI). Links to these fine broadcasts, with schedules, are posted here.

      I received these images 2 October 2024, 1330-1400 UTC, 15770 kHz from WRMI Florida, via an SDR in Bermuda …

      image
      • 2 months ago
      • #shortwave
      • #digimodes
    © 2017–2024
    Next page
  • Page 1 / 43