Category Archives: Digital Modes

FT4 digital mode now available in WSJT-X release candidate 5

Joe Taylor presenting FT4 at the Fair Lawn Amateur Radio Club

(Source: Southgate ARC)

The new amateur radio digital mode FT4 is now available for download as part of WSJT-X Release Candidate 5

You can download wsjtx-2.1.0-rc5-win64.exe (or for other O/S) from near the bottom of the page at
http://physics.princeton.edu/pulsar/k1jt/wsjtx.html

FT4 Protocol document
http://physics.princeton.edu/pulsar/k1jt/FT4_Protocol.pdf

See the WSJT Group at
https://groups.io/g/WSJTX/

For more information about FT4, check out this previous post.

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Ham Radio Digital Modes: Joe Taylor talks FT8 and introduces FT4

Many thanks to SWLing Post contributor, Pete Eaton, who shares the following note and video:

Here is a You Tube Video of a presentation given by Joe Taylor last night at the Fair Lawn ARC Club Meeting on FT8 & Beyond an introduction to FT4.

Click here to view on YouTube.

Thank you for the tip, Pete!  FT4 looks like a fascinating iteration of the popular FT8 mode.

Post Readers: Any fans of FT8 out there?

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Digital AM: FCC takes a closer look

Many thanks to an SWLing Post reader who writes:

Thought you and the SWLing bunch would be interested to learn about this. The promoters make it sound so go, but fail to mention all the problems and pitfalls. Hopefully, it will go nowhere, which is the best course possible!

(Source: Inside Radio)

The prospect of a digital-only AM station may still be far on the horizon, but if it one day becomes reality the first step to securing regulatory approval has just occurred. The Federal Communications Commission has put up a proposal submitted by Texas broadcaster Bryan Broadcasting last month for public comment. It’s not a formal rulemaking, but the process could lay the groundwork for a FCC decision allowing digital-only AMs in the future.

In a petition filed last month, Bryan Broadcasting VP and general Ben Downs said giving stations the option of dropping their analog signal would provide struggling AM owns an “innovative tool” with which to compete. Broadcasters will have until May 13 to chime in on what’s been docketed as RM-11836.

Downs says he’s pleasantly surprised to see the FCC moving so quickly on his petition. The proposal drew some attention among engineers at last week’s NAB Show, although agency staffers were less committal. That made it all the more encouraging when Downs returned from the Las Vegas convention to learn the Media Bureau opened it up to comments.

“It was clear from the discussion panels that unless there’s interest shown in this 30-day comment period, we will not have this approved as a licensed option,” Downs said. “I don’t think anyone questions the all-digital MA-3 option from a technical feasibility position anymore, separate from the hybrid mode that is authorized. So I would hope the Commission would recognize that this is the next logical step in the AM Revitalization effort.”[…]

Click here to read the full article at Inside Radio.

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April 9th – 23rd, 2019: Transmitting Reykjavik Museum of Photography glacier images via HF SSTV

One of the images to be transmitted: Image 1 ~ 1955-1970, Þórsmörk. A lightly dressed elderly man looks at Eyjafjallajökull glacier

Many thanks to Lucy Helton (KD2MFV) who writes:

Dear Thomas,

Between April 9th – 23rd 2019, I’m artist-in-residence at SIM, in Reykjavik, Iceland, to partner with Jón Þ Jónsson, TF3JA, an Icelandic Radio Amateur and member of Icelandic Radio Amateurs ÍRA, to transmit images via SSTV . The images, appropriated from the Reykjavik Museum of Photography’s collection, are of Icelandic glaciers photographed in a time before we knew climate change existed. I’m asking HAM radio operators who receive my long-range image transmissions, to print out the images received and mail them back to me, using instructions on my website (www.lucyhelton.com). I will be updating the blog daily.

In exchange, when I have assembled the printed pieces to reconstruct the whole image transmitted, I will make QSL postcards of the completed images and mail them back to the participating HAMs. The resulting artwork will be a collaborative fine art example of long-range communications between humans, concerning accelerated environmental change.

I would greatly appreciate it if you could please notify HAM’s of the existence of this project by announcing it on the blog?

Transmissions

Each single transmission consists of 12 x SSTV images. I will be transmitting 5 different glacier images over 15 days.

SSTV calling frequency and daily transmission times are (the frequency will be + / – 5kHz):

20 meters: (USB) 14.230 MHz @ 1pm / 6pm / 11pm GMT

For more project information on please go to: www.lucyhelton.com

Many thanks,

Lucy Helton KD2MFV

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Sangean HDR-15/DPR-64 and notes from 2019 catalogs

The Sangean HDR-15

Many thanks to SWLing Post contributor, Mike Schuster who writes:

Hi Thomas,

Sangean has quietly buried yet another AM/FM HD radio in the PDF of their US 2019 catalog [download as a PDF].

It’s the HDR-15 which appears to be a small clock radio/phone dock [photo above].

Also, in their European catalog [click here to download as PDF] they are transitioning all of the model names to a more descriptive grouping. So the SR-35 is now the “Pocket 100”, the DT-160 is now the “Pocket 160”, and the DT-800 is the “Pocket 800”.

There is also a new DAB+ portable, the DPR-64 (em … er …”Pocket 640“) whose cabinet is rounder and smaller than the DPR-65 (em … er … “Traveller 650“) whose cabinet they adapted for the American HDR-14. Wonder if there will be a forthcoming US HD-radio portable based on this cabinet design. This looks very interesting to me as a potential DAB+ travel radio, priced at about $100 and already available from several European and Australian electronics houses.

Thanks for the tip, Mike! I enjoyed checking out both the US and European catalogs. Sangean is certainly embracing DAB+ and HD Radio.

I see Sangean also includes two shortwave radios: the ATS-909X and ATS-405.

In the EU catalog, they’re referred to as the “Discover 909X” and the “Discover 405.”

Click here to view the Sangean EU website and here for the Sangean US website.

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