Category Archives: DRM

Radio Waves: Sowing Fear in War Zone, Shortwave’s Pedigree, CBC/Radio-Canada Moscow Bureau to Close, and a Voice for Hungary’s Roma Minority

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Radio Waves:  Stories Making Waves in the World of Radio

Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Russian radio voices sow fear in Ukraine war zone (France24)

Lysychansk (Ukraine) (AFP) – The portable radio in the dark cellar of the rocket-damaged kindergarten was transmitting news in Russian over whistling airwaves about the Kremlin’s military triumphs in Ukraine.

The six frightened women and lone man cowering in the heart of the east Ukrainian war zone had no idea whether to believe the monotone voice — or who was actually patrolling the streets of the besieged city of Lysychansk above their heads.

All they knew was that their building was hit a few days earlier by a Grad volley that left the tail end of one of the unexploded rockets sticking out of the pavement at a sharp angle just steps from the back door.

Their feverish fears vacillated between the idea that their shelter’s lone entrance might get blocked by falling debris and that the Kremlin’s forces might come knocking unannounced.

“The Russians on the radio just said that they have captured Bakhmut. Is that true?” Natalia Georgiyevna anxiously asked about a city 30 miles (50 kilometres) to the southwest that remains under full Ukrainian control. [Continue reading…]

Thoughts on Shortwave’s Heritage and Future (Radio World)

In this guest commentary, DRM’s Ruxandra Obreja dives back in to the shortwave debate

Radio World’s “Guest Commentaries” section provides a platform for industry thought leaders and other readers to share their perspective on radio news, technological trends and more. If you’d like to contribute a commentary, or reply to an already published piece, send a submission to [email protected].

Below is perspective from Ruxandra Obreja, consortium chairman of Digital Radio Mondiale (DRM), in response to the commentary “Shortwave Revival a Non-Starter? The Authors Respond.” Her commentaries appear regularly at radioworld.com.

Seldom have we seen so much passion and polarizing views as in the recent articles for and against shortwave. From “it’s dead and gone” to “this is the revival,” all shades of opinion concerning this simple and all-encompassing platform have been expressed vigorously.

Shortwave Has a Pedigree

Shortwave, currently used for large-area, regional and international coverage in the developing world, certainly registered a decline in the past two decades (but it never died, as you can see here). This loss of pre-eminence in the developed world after the Cold War is not surprising. The platforms available nowadays, in the so called “global village,” include “basic” internet connections (browsing, emails, messaging apps of any type), to the prolific social media products (Facebook, Instagram, Twitter, Reddit), as well as video, radio and TV apps, satellites, mobiles give the impression that the whole world is truly connected!

At least this is the view from Washington, London, or Berlin. But there are the same proportion of people in Europe and America with everyday internet access as there are in Africa with no way to access to it. In such regions, shortwave and mediumwave radio remains essential for many, one of only a few reliable means to receive communication.

Since the arrival of AM and FM some seventy years ago, the invention of at least three largely recognized digital broadcasting systems (DRM, DAB/DAB+ and HD) is the most notable radio development. Digital Radio Mondiale — the DRM open-source global standard — is the latest and most advanced of the three systems, but the only one that can digitize radio in all frequency bands and the only digital option for shortwave.

Closing shortwave transmitters and then trying to restart them presents a huge time, effort and financial challenge. However, nowadays, broadcasters can often buy shortwave transmission hours, in digital, too, from third party distributors, and do not necessarily need to rebuild a comprehensive infrastructure. [Continue reading at Radio World…]

Russia to close CBC/Radio-Canada Moscow bureau (Public Media Alliance)

The closure of the public media organisation’s bureau demonstrates further curtailment of independent and free press in Russia.

CBC/Radio-Canada – the only Canadian news organisation with a permanent presence in Russia – has been ordered by the Kremlin to close its bureau. After more than 44 years of reporting from Moscow, CBC/Radio-Canada staff have been told to leave the country. However, Vladimir Proskuryakov, deputy chief of mission of the Russian Embassy to Canada, said they would not be rushed out of the country. He told the CBC News the staff would not be forced to leave in “less than three weeks.”

CBC/Radio-Canada currently has 10 employees working in Moscow, including locally hired staff.

The move is retaliatory and comes two months after the Canadian telecommunications regulator, CRTC, banned Russian state TV stations RT and RT France from broadcasting in Canada. [Continue reading…]

Radio station elevates voices of Hungary’s Roma minority (AP News)

BUDAPEST, Hungary (AP) — Intellectuals, broadcasters and cultural figures from Hungary’s Roma community are using the airwaves to reframe narratives and elevate the voices of the country’s largest minority group.

Radio Dikh — a Romani word that means “to see” — has broadcast since January on FM radio in Hungary’s capital, Budapest. Its 11 programs focus on Roma music, culture and the issues faced by their community, and aim to recast the way the often disadvantaged minority group is perceived by broader society.

“Roma people in general don’t have enough representation in mainstream media … and even if they do, it’s oftentimes not showing the right picture or the picture that is true to the Roma community,” said Bettina Pocsai, co-host of a show that focuses on social issues.

Radio Dikh, she said, aims to “give voice to Roma people and make sure that our voice is also present in the media and that it shows a picture that we are satisfied with.”

Some estimates suggest that Roma in Hungary number nearly 1 million, or around 10% of the population. Like their counterparts throughout Europe, many of Hungary’s Roma are often the subjects of social and economic exclusion, and face discrimination, segregation and poverty.

Adding to their marginalization are stereotypes about Roma roles in society, where they are often associated with their traditional occupations as musicians, dancers, traders and craftspeople that go back centuries. [Continue reading…]

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Radio Waves: DRM Part of BBC Story, Antennas and Smith Charts, Shortwave “Hot Debate,” Carrington Event, and “Deep Freeze”

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Radio Waves:  Stories Making Waves in the World of Radio

Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

DRM Is Part of the BBC World Service Story (Radio World)

The iconic broadcaster has been supportive of the standard for over 20 years

The author is chairman of the DRM Consortium. Her commentaries appear regularly at radioworld.com.

Our old friend James Careless studiously ignores DRM once more in his well-researched, but to our minds incomplete article “BBC World Service Turns 90” in the March 30 issue.

As an ex-BBC senior manager, I would like to complete the story now that the hectic NAB Show is over.

Having lived through and experienced at close quarters the decision to reduce the BBC shortwave about 20 years ago, I can confirm that the BBC World Service decision to cut back on its shortwave footprint — especially in North America, where reliable, easy-to-receive daily broadcasts ceased — has generated much listener unhappiness over the years.

In hindsight, the decision was probably right, especially in view of the many rebroadcasting deals with public FM and medium-wave stations in the U.S. (and later other parts of the world like Africa and Europe) that would carry news and programs of interest to the wide public.

But BBC World Service in its long history never underestimated the great advantages of shortwave: wide coverage, excellent audio in some important and populous key BBC markets (like Nigeria) and the anonymity of shortwave, an essential attribute in countries with undemocratic regimes.

BBC World Service still enjoys today about 40 million listeners worldwide nowadays. [Continue reading…]

The Magic of Antennas (Nuts & Volts)

If you really want to know what makes any wireless application work, it is the antenna. Most people working with wireless — radio to those of you who prefer that term — tend to take antennas for granted. It is just something you have to add on to a wireless application at the last minute. Well, boy, do I have news for you. Without a good antenna, radio just doesn’t work too well. In this age of store/online-bought shortwave receivers, scanners, and amateur radio transceivers, your main job in getting your money’s worth out of these high-ticket purchases is to invest a little bit more and put up a really good antenna. In this article, I want to summarize some of the most common types and make you aware of what an antenna really is and how it works.

TRANSDUCER TO THE ETHER
In every wireless application, there is a transmitter and a receiver. They communicate via free space or what is often called the ether. At the transmitter, a radio signal is developed and then amplified to a specific power level. Then it is connected to an antenna. The antenna is the physical “thing” that converts the voltage from the transmitter into a radio signal. The radio signal is launched from the antenna toward the receiver.

A radio signal is the combination of a magnetic field and an electric field. Recall that a magnetic field is generated any time a current flows in a conductor. It is that invisible force field that can attract metal objects and cause compass needles to move. An electric field is another type of invisible force field that appears between conductors across which a voltage is applied. You have experienced an electric field if you have ever built up a charge by shuffling your feet across a carpet then touching something metal … zaaapp. A charged capacitor encloses an electric field between its plates.

Anyway, a radio wave is just a combination of the electric and magnetic fields at a right angle to one another. We call this an electromagnetic wave. This is what the antenna produces. It translates the voltage of the signal to be transmitted into these fields. The pair of fields are launched into space by the antenna, at which time they propagate at the speed of light through space (300,000,000 meters per second or about 186,000 miles per second). The two fields hang together and in effect, support and regenerate one another along the way. [Continue reading…]

Smith Chart Fundamentals (Nuts & Volts)

The Smith Chart is one of the most useful tools in radio communications, but it is often misunderstood. The purpose of this article is to introduce you to the basics of the Smith Chart. After reading this, you will have a better understanding of impedance matching and VSWR — common parameters in a radio station.

THE INVENTOR
The Smith Chart was invented by Phillip Smith, who was born in Lexington, MA on April 29, 1905. Smith attended Tufts College and was an active amateur radio operator with the callsign 1ANB. In 1928, he joined Bell Labs, where he became involved in the design of antennas for commercial AM broadcasting. Although Smith did a great deal of work with antennas, his expertise and passion focused on transmission lines. He relished the problem of matching the transmission line to the antenna; a component he considered matched the line to space. Continue reading →

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A look inside: The Worldwide Listening Guide’s Tenth Edition

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As I’ve mentioned many times here on the SWLing Post, I’m something of a “content DXer.”

Clearly, I enjoy chasing obscure programming––news, documentaries, music, variety shows, anything the broadcasting world has to offer.   Even though my favorite medium for doing this has been shortwave radio, these days, I often turn to Wi-Fi or over-the-internet radio.  Wi-Fi radio offers the discerning listener the ability to track down fascinating regional content from every corner of the globe––content never actually intended for an international audience.

If you, too, like the chase, The Worldwide Listening Guide (WWLG) will be your go-to, and this recent edition––the tenth!––is the latest in a long line of handy volumes that help the listener catch what’s out there, noting that with each passing year there’s more content to catch.

Cornucopia of content

The variety of content from online broadcasters today is surely orders of magnitude more than any one individual has ever had via over-the-air (OTA) radio sources.

Though my WiFi radio offers an easy and reliable way to “tune” to online content––both real-time station streams and on-demand podcasts––the content discovery part is actually quite difficult. I liken it to browsing a large public library looking for a new and interesting book to read, but without the guidance of a librarian. The options are so plentiful that even with superb indexing and organization, one simply doesn’t know where to begin.

On the other hand––and I’m speaking from very recent experience here––if you find a good local independent bookstore, you might actually discover more meaningful titles because the bookstore selections are curated by both the proprietor and the local community.

With this analogy in mind, The Worldwide Listening Guide is essentially my local bookstore for online content and programming.

I recently received a review copy of the new 10th Edition of the Worldwide Listening Guide  by John Figliozzi and, as always, I enjoyed reading it from cover to cover.

The WWLG speaks to the types of programming I enjoy as an SWL because the author, John Figliozzi, is a devoted shortwave radio and international broadcasting enthusiast.

And while the bulk of the WWLG is a detailed and beautifully organized programming guide, it’s also so much more…

“The Many Platforms of radio”

As I’ve so often said, the WWLG is a unique guide; there’s nothing quite like it on the market because it truly takes a deep dive into the world of broadcasting and content delivery both from a technology and programming point of view.

Each media delivery platform, whether on AM, Shortwave, FM, Satellite Radio, Internet (WiFi Radio), and Podcasting, has a dedicated section in the book where Figliozzi explores each in detail. He also speaks to the state of each platform both from the broadcaster’s and the listener’s perspective.

Indeed, each chapter dedicated to these topics very much reminds me of the old Passport to Worldband Radio that I first picked up in the 1990s. The WWLG serves as a primer, but also speaks to the health and potential longevity of each platform.

I appreciate the fact that Figliozzi also addresses the nuts-and-bolts side of both over-the-air and online broadcasting.  For while I’d like to think that I’m reasonably knowledgeable about the world of radio, I find I always discover something new in each edition.

There’s a surprising amount of information packed into this slim, spiral-bound volume. The Worldwide Listening Guide is enough to keep even a seasoned content DXer happy for years…or at least, until the latest edition comes out!

In short? The WWLG is a bargain for all it offers, and I highly recommend it.

The 10th edition of The Worldwide Listening Guide can be purchased here:

Note that at time of posting copies of the WWLG can be pre-ordered at Universal Radio. Amazon.com will soon have links to purchase the 10th edition when they’re in inventory. I assume the W5YI group will also have the 10th edition available for purchase soon!  

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DRM Mystery: Benn shares the latest on Turms Tech Station WIPE

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The following article by Benn Kobb was posted on Dec. 25 to Glenn Hauser’s World
of Radio list on groups.io. I repost it here with Benn’s permission:

Subject: As the World ‘Turms’

It would seem like 2021 would end with no FCC action on the three mysterious entities requesting licenses under the umbrella of International Broadcasting, but likely involved in sending private messages to trading clients in Europe and Asia.

In fact there has been action, of a sort.

Two of those applicants are still waiting to receive construction permits. The third — Turms Tech, part of Turms Holdings, a subsidiary of Emcor Securities of New York — already has a construction permit and says it has built a 10 kW DRM station in New Jersey.

Turms requested callsign WIPE. It is so listed with the FCC. Turms has no license to operate this station. Yet.

The FCC is apparently not clear about whether Turms intends to use WIPE for conventional broadcasting — you know, the only type of transmission permitted under the FCC rules for such HF stations.

Turms originally told the FCC that it will engage in “broadcast and data services” and “broadcast of financial, economic news and data through distribution of programs generally prepared on the basis of requests by clients.”

Clear as mud. If broadcasting business news on shortwave to DRM receivers is profitable, you’d think that WTWW, WRMI, WBCQ, WWRB etc. would have discovered that years ago.

And what’s that about “data”? The FCC rules are plain that HFBC stations are for broadcasting to the public. There is no exemption to that requirement whether the broadcast is audio for listening or data for decoding.

So to clarify the issues, on Dec. 3, 2021 five FCC staff members asked WIPE’s consulting engineer if he could answer a few questions.

He couldn’t, at the time. Quoting from a record of that online meeting: “The information being sought was clarification of certain general non-technical items that will be possibly proposed by the pending shortwave operation. These type of items or clarifications are not normally items that this [engineering] firm would be knowledgeable.”

Presumably after consulting with his client Turms, he later provided FCC with these answers:

– – –

Q: Clarification is requested regarding the audio and data content of the general service to be provided, if known?

A: Airtime will be sold to anyone interested in broadcasting his contents. Editorial line will focus on contemporary topics, no religious or political contents. More specifically the target we’re looking for is global news and financial information, CNBC style programs.

Q: Will encryption be used in the transmitted signal?

A: No encryption will be used, this is a general broadcast.

Q. Will there be a contract for reception of the signal required?

A. No contract will be required for the reception.

Q. Will a DRM receiver be required for either or both the audio or the data?

A. A DRM receiver will be required for both audio and data.

Q. Will the proposed transmitter site receive other international HF signals to be rebroadcast on the intended operation?

A. No.

– – –

The FCC’s question about contract is especially pertinent, as the FCC considers broadcasting to require no contract between transmitting and receiving parties. A private data operation would involve such a contract, usually for some kind of subscription or other fee for service.

So what should we believe? WIPE will not engage in private data communications, but will instead pursue a sketchy business plan?

On December 23, 2021, RF engineer Alex Pilosov submitted a detailed objection — his second — to the TURMS application. According to Pilosov, “the directors and officers of TURMS do not claim any broadcasting experience, but certainly have substantial business experience, and are aware of the business of trading and data transmission.

“What TURMS claims,” he told the FCC, “is that a company without any experience in broadcasting decides to construct the first International Broadcast station in 20 years dedicated to ‘financial news’ programming, and ‘data broadcast to the general public,’ foregoing any subscription revenues, but somehow able to recoup the setup costs by broadcast operations alone.

“The second possibility, apparent from digging into the facts and associated entities, is that TURMS instead lacked candor in its filings, and that its application for ‘International Broadcast’ is merely a pretext for private data transmission business.”

If and when WIPE goes on the air — on 9.65, 11.850, 13.720 and 15.450 MHz — DRM monitoring by the SWL community should help establish the facts about any possible encrypted or otherwise non-public, non-broadcast emissions from this station.

Benn Kobb

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Radio Nacional da Amazonia prepares for DRM broadcasts

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Photo: DRM Consortium

Many thanks to a number of SWLing Post contributors who share the following news from the DRM Consortium:

Brazil prepares for domestic DRM transmissions to Amazonia (DRM Consortium)

DRM broadcasts from a locally produced transmitter will be originated for the first time in Latin America, as Brazil will officially start digital (DRM) shortwave transmissions through The National Radio of the Amazon towards the vast area of the northern Amazon region, mainly inhabited by indigenous populations.

In another first, Empresa Brasil de Comunicação (EBC), the public broadcaster, placed the order for the high-powered transmitter with a local manufacturer, the BT Transmitters company from Porto Alegre. BT Transmitters signed a contract with EBC for the production of a 100 kW transmitter in the DRM digital system.

The equipment will be used on the 11,780 kHz frequency in the 25-meter band, which is one of the shortwave channels used by Rádio Nacional da Amazônia since 1977.

The purchase for R$3.5 million is the result of an auction held in August 2020, in which other equipment for EBC’s public radio broadcasts is planned to be acquired.

At the end of last year, Nacional da Amazônia carried out tests with the DRM technology using a transmitter of 2.5 kW with the digital power of just 1 kW.  EBC demonstrated then, for the first time in the country, the use of multi-programming and the transmission of interactive multimedia applications.

Despite this low power of the transmitter supplied by BT Transmitters, recordings were reported from different regions of the country and even from North America and Europe (Radiolab – Começam transmissões de rádio digital DRM em onda curta no Brasil).

The results of the tests were published last month by the DRM Consortium.

The DRM (Digital Radio Mondiale) standard provides power savings of up to 80% in electricity consumption, a sound quality equal or superior to FM, as well as allowing images and other data to be sent to the radio receiver.

DRM is a worldwide consortium, and more information can be found at www.drm.org.

This story was also noted in Radio World:

DRM Shortwave Will Serve Amazon Region (Radio World)

National Radio of the Amazon orders a 100 kW BT transmitter

National Radio of the Amazon plans to use DRM shortwave transmissions to serve indigenous populations in the northern Amazon region, according to the Digital Radio Mondiale Consortium.

Public broadcaster Empresa Brasil de Comunicação (EBC) ordered a 100 kW BT transmitter to broadcast in DRM at 11,780 kHz in the 25-meter band, a shortwave channel used by Rádio Nacional da Amazônia.

The purchase, valued at about $650,000 USD, was the result of an auction held a year ago for purchase of equipment for EBC public radio broadcasts.

This is believed to be the first domestic DRM installation on a locally produced transmitter in Latin America.

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Short recording of BBC World Service in DRM

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Many thanks to SWLing Post contributor, Mangosman, who shares the following off-air recording via the KiwiSDR network and notes:

Attached is a diagram showing the path and the receiver data, the end of a one hour daily broadcast is in the other file. They switched the transmitter back to AM before the end of the station promo.

I listened to the same broadcast on the previous day. It did not have any disturbances over that time. The quality was identical.

That’s a great decode of the BBC in DRM. Thanks for sharing! DRM is such an amazing mode when you get consistent and stable reception. Here in North America, that can be very difficult to achieve, but it’s fascinating when it does happen! Thanks for sharing!

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STARWAVES DRM SoftRadio App for Android now released

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Photo by Adrien on Unsplash

Many thanks to SWLing Post contributor, Dan Srebnick, who shares the following press release from Starwaves:

STARWAVES DRM SoftRadio App for Android now available!

Good news for all SDR friends: STARWAVES DRM SoftRadio App for Android is now available for public use! Listen to DRM – Digital Radio Mondiale live radio broadcasts on your Android smartphone or tablet by simply connecting an SDR RF dongle via USB.

The app is available on Google Play Store and Amazon App Store.

The STARWAVES DRM SoftRadio allows you to conveniently enjoy any DRM live radio broadcast on your Android smartphone or tablet. No Internet connection required. All you need is an SDR RF dongle or receiver connected to your device via USB.

DRM or Digital Radio Mondiale is the global digital radio standard used for all digital international transmissions as well as for national and local services in many countries. To learn more about DRM and its features visit https://www.drm.org.

Please see our DRM SoftRadio Knowledge Base for further details!

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