Hello friends,

On August 14, I received an interesting email from Barry, K3EUI, of the PA NBEMS io discussion group: «The fastest mode we find that works well on 2m FM is 8PSK1000F. It is lightning fast, but needs a good S/N  to work well.»

I used to experiment with digital modes on VHF and UHF FM carriers, so I wanted to try this out. I don’t know any local hams who use Fldigi modes on VHF/UHF, so, for the moment, I had to do this solo. I transmitted text on 146.58 FM simplex, 15 watts, using the yagi on my roof. The receiver was an old Radio Shack scanner, using its whip antenna, in my RF-unfriendly basement. Copy of the text, at 3300 wpm, was perfect. 

Now I need to find a local ham who wants to try this. It might have to be through a repeater, in which case I would need permission of the repeater owner. And the length of the test transmission would have to be limited to the repeater’s time-out.

On shortwave, we can only dream of such speeds. MFSK32 and MFSK64 still seem to be the most  suitable for AM carriers in a shortwave broadcast environment.
A video of last week’s Shortwave Radiogram (program 413) 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 414, 21-27 August 2025, in MFSK modes as noted:

 1:44  MFSK32: Program preview 
 2:56  MFSK32: New Radio Taiwan International democracy podcast
 7:30  MFSK64: Paper urges less dependence on submarine cables
11:34  MFSK64: This week’s images
27:57  MFSK32: Closing announcements

Please send reception reports to radiogram@verizon.net

And visit http://swradiogram.net

Bluesky:swradiogram.bsky.social or  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

Shortwave Radiogram Transmission Schedule

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

Fuente: https://swradiogram.net/

Categorías:Broadcasting

Etiquetas:Digital Modes, Frecuencias, MSFK64, Onda Corta, Shortwave, SW, SWL