Category Archives: Digital Modes

UK digital radio listening now eclipses analog according to study

(Source: Radio Mag Online via Marty Kraft)

LONDON — In the United Kingdom, the use of digital sources for radio has reached 50.9%, up from 47.2% a year ago, accounting for the majority of all listening for the first time, according to RAJAR Q1 2018 data.

“With the 50% digital listening threshold now met, it is anticipated that the UK government will undertake a review to assess digital radio progress and determine next steps in due course,” according to a Digital Radio UK press release.

Digital listening share is comprised of listening across all digital platforms: DAB in homes and in cars, apps and online (which includes the growing number of smart and voice-controlled speakers) and DTV — and this is the first time that listening to digital has been greater than analog platforms — FM and AM.

[…]The UK’s three leading radio broadcasters — the BBC, Global and Bauer, which collectively account for over 90% of UK radio listening — are “fully committed to delivering a digital future for radio and look forward to working with government and the supply chain to continue the transition to digital radio.”

Click here to read the full article.

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BBC is “keen to exploit DRM” but manufacturers must develop a multi-standard receiver chip

(Source: Radio World via Mike Hansgen)

LONDON — The BBC World Service, available on radio, TV and online, is part of one of the largest news organization in the world, the BBC.

The weekly reach of the World Service on all platforms accounted for 269 million (up from 246 million in 2015–16).

[…]Large numbers of the BBC’s audience still need international radio broadcasts.

[…]Right from its late ’90s inception, the development of Digital Radio Mondiale was fully supported and enhanced by the BBC World Service. DRM was seen as an efficient replacement for the analog AM transmissions. When we consider scarcity of spectrum for new uses and appreciate the characteristics of the radio broadcast bands, we recognize the tremendous properties these continue to offer broadcasters to deliver programs over sometimes very large distances and areas or in difficult terrain.

[…]The BBC is keen to exploit DRM in order to deliver, to key markets, BBC content free of gatekeepers in a form that can be accessed easily.

For that to be possible, the multi-standard receiver chip is required, and manufacturers must appreciate and act on this global market potential.

Click here to read the entire article at Radio World.

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Don’t buy into the doom-and-gloom: Low sunspots are not the end of DXing!

In response to the spaceweather.com article about a lack of sunspots I posted yesterday, SWLing Post contributor, Rob Wagner (VK3BVW), replies:

Oh Thomas! Really?
It’s not all doom-and-gloom, you know! The low-frequency part of the SW spectrum is proving very good value at the moment. And the mediumwave guys are telling me that there’s plenty of DX to be had in that part of the RF spectrum.
And yesterday, I had some FT8 success!
From southeastern Australia on a dipole with 5w getting into Plymouth, Minnesota on 14mHz in the mid-afternoon here. Not bad at all for the bottom of the sunspot cycle!

Ha ha! Thanks for your reply, Rob! Honestly, I wasn’t trying to spread doom-and-gloom, rather I was pointing out how low this sunspot cycle has gone. (Okay, so perhaps I was also shaking my fist at our local star!)

I completely agree with you Rob. It’s not all doom-and-gloom! Here are a few strategies for working DX during sunspot lows:

Go low!

Sunspots really enhance propagation on the higher HF bands:  especially 17 meters and higher. Without supspots, you’re not going to reliably snag serious DX on 10 meters, for example–there will be the occasional opening, but it might not last long. During sunspot cycle peaks, the higher bands provide outstanding DX opportunities even with a modest setup.

During one peak, I’ll never forget sitting in my car in North Carolina, with a RadioShack 10 meter mobile radio connected to a mag mount antenna, and having a three way chat with a ham in Sandiego, CA and one in Glasgow, Scotland.

With that said, even this year I’ve snagged some excellent DX on 17 meters (my favorite HF band). And, as you point out Rob, 20 meters is a great band for snagging serious DX even with no sunspots giving you a boost.

Openings between the US and Australia happen routinely on the 40 meter band as well, although some of us might have to wake up early or go to bed late to participate.

Of course all of this same advice applies for SWLing. Most of the DX I snag these days is found on the 25 meter band and lower. I’ve also been using this opportunity to explore Mediumwave DXing.

Digital Modes

Kim Elliott and I had an exchange about this yesterday on Twitter. Some digital modes are so robust they seem to work regardless of propagation.

Kim knows this well as he receives reception reports from Shortwave Radiogram listeners across the globe each week.

If you’re a ham radio operator, I strongly encourage you to check out the latest “weak signal” digital modes: JT65 and, especially, FT8.

In fact, SWLing Post contributor, Robert Gulley (AK3Q), wrote an excellent introduction to these modes in the June 2017 issue of The Spectrum Monitor magazine.

Robert and I talk about the FT8 mode frequently. Since I discovered this mode at the 2017 W4DXCC conference, I’ve been hooked. Sure–it lacks the nuances of phone and CW, but it’s incredibly fun to watch my flea-powered signal acknowledged by someone on the other side of the planet with a flea-powered signal.

As Robert will tell you, FT8 seems to defy propagation theory. I agree wholeheartedly.

I’ve worked some of my best DX with this mode during the sunspot low and have never used more than 15 watts out of my Elecraft KX3 and KX2.

Don’t give up!

Although propagation was poor, I worked more stations during National Parks On The Air than I had worked the entire time I’ve been a ham radio operator. All in the field with modest portable antennas and 15 watts or less.

Use the sunspot low as an excuse to explore frequencies and modes you’ve never used before. Use this as an opportunity to improve your listening skills and the most important part of your listening post or ham station–your antenna system!

I regularly get email from people who’ve found the SWLing Post and take the time to write a message to me complaining about the death of shortwave radio: the lack of broadcasters, the prevalence of radio interference and the crummy propagation.

My reply?

“Hey…sounds like radio’s not your thing!”

While this same person is moaning and complaining, I’ll be on the radio logging South American, Asian and African broadcast stations.

I’ll be working DX with QRP power, even though everyone tells me that’s not possible right now.

I’ll be improving my skill set and trying new aspects of our vast radio world.

You see: I’ve learned that the complainers aren’t actually on the air. They gave up many moons ago because someone told them it wasn’t worth it, or they simply lost interest. That’s okay…but why waste time complaining? Go find something else that lights your fire!

While these folks are complaining, I’ll be on the air doing all of the things they tell me I can’t do.

Rob, thanks for your comment!

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Possible International Space Station SSTV test Wednesday

(Source: Southgate ARC)

Possible ISS SSTV on Wednesday

The latest ARISS schedule notes that the 145.800 MHz FM Slow Scan Television on the International Space Station may be tested on April 25

The callsign to be used will be RS0ISS and the SSTV test will be with Kursk in Russia and is expected to start at 0835 UT on April 25.

ARISS schedule as at April 23
http://www.amsat.org/pipermail/amsat-bb/2018-April/067782.html

When in range these WebSDRs can be used to receive the ISS on 145.800 MHz FM world-wide
– Farnham near London http://farnham-sdr.com/
– Russia R4UAB http://websdr.r4uab.ru/

ISS SSTV https://amsat-uk.org/beginners/iss-sstv/

Click here to view at the Southgate ARC.

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Special two hour DRM broadcast today at 12:00 UTC

According to the DRM Consortium, there will be a special two hour DRM broadcast today (April 18) starting at 12:00 UTC:

Special DRM transmission tomorrow 18th April from Spaceline during DRM GA at 1200-1400UTC on 11600kHz. From Kostinbrod, Bulgaria with antenna directed at 260 degrees. The content will be from Mighty KBC.

Note that this broadcast starts less than two hours from time of posting. Please comment if you log this broadcast!

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Video: Professor Joe Taylor K1JT talks FT-8 and WSJT-X

(Source: Southgate ARC)

Work the World with WSJT-X

Video of the talk given by Professor Joe Taylor K1JT about the FT-8 and WSPR modes at the 2018 MicroHAMS Digital Conference on March 24

Budd Churchward WB7FHC writes:

Dr. Joe Taylor, K1JT, author of many of the weak signal digital modes and co-author of the very popular FT-8 mode presented: “Work the World with WSJT-X”  at the 2018 MicroHAMS Digital Conference in Redmond, Washington about the WSJT-X Digital Software Suite for Amatuer Radio.

Dr. Taylor gives a detailed description of both the FT-8 and WSPR modes that so may Hams are using all over the world.

Watch Work the World with WSJT-X – Dr. Joe Taylor

Click here to view on YouTube.

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The ISS will be sending SSTV in April

(Source: ARRL via Eric McFadden, WD8RIF)

Space Station’s Slow-Scan Television System to be Active in April

The Amateur Radio Slow-Scan Television (SSTV) system on the International Space Station (ISS) is expected to be active in April on 145.800 MHz (FM). The Russian segment’s MAI 75 SSTV has announced transmissions on Monday, April 2, 1505 – 1830 UTC, and on Tuesday, April 3, 1415 – 1840 UTC.

“Reviewing the crew schedule, the SSTV activity, which uses Amateur Radio on the International Space Station (ARISS) radios, was coordinated around ARISS school contacts and is listed for April 2 and April 3,” said NASA ISS Ham Project Coordinator Kenneth Ransom, N5VHO.

The SSTV system, which uses the call sign RS0ISS, is also expected to be active from April 11 – 14 worldwide to mark Cosmonautics Day in Russia on April 12. Specific transmission times are not yet available. Images on all dates will be related to the Soviet Union’s Interkosmos cooperative space ventures project.

SSTV images will be transmitted in PD-120 format on 145.800 MHz (FM) using the Kenwood TM-D710 transceiver in the ISS Russian Service Module. ISS transmissions use the 5-kHz deviation FM standard. It’s possible to receive SSTV transmissions with only a handheld transceiver and appropriate SSTV software[…]

Click here to read the full article on the ARRL website.

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