Tag Archives: Digital Radio

Radio Waves: Antenna ID, DRM Receiver Requirements Revisited, BBC Broadcasting Technology, and Digital Sound Broadcasting Framework in Kenya

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!


Identify that antenna by sight (Hackaday)

It’s a skill that radio amateurs pick up over years but which it sometimes comes as a surprise to find that is not shared by everyone, the ability to casually glance at an antenna on a mast or a rooftop and guess what it might be used for. By which of course I mean not some intuitive ability to mentally decode radio signals from thin air, but most of us can look at a given antenna and immediately glean a lot of information about its frequency and performance. Is this privileged knowledge handed down from the Elmers at the secret ceremony of conferring a radio amateur’s licence upon a baby ham? Not at all, in fact stick around, and I’ll share some of the tricks. [Continue reading…]

Minimum Receiver Requirement Document Revisited (DRM Consortium)

The latest version of the document (mrr.drm.org) describes the DRM (Digital Radio Mondiale) receiver characteristics for consumer equipment intended for terrestrial reception operating in the frequency bands below 30 MHz (i.e. DRM robustness modes A to D) and also those for the frequency bands above 30 MHz (i.e. DRM robustness mode E). The goals of the document are to: provide guidelines to receiver manufacturers for minimum receiver performance and technical features, to offer confidence to broadcasters that their DRM transmission can be received by all receivers in the market, to assist broadcasters to plan their network and to give full confidence to consumers that all important DRM features are supported by receivers and all DRM transmissions can be received when they acquire a digital DRM receiver.

Click here to download (PDF).

BBC broadcast tech: then and now (Engineering and Technology)

In its centenary year, we look at the BBC’s pivotal role in making the broadcast and radio technology field what it is today.

Daily London broadcasts by the newly formed British Broadcasting Company began from Marconi House on The Strand, on 14 November 1922, using the call sign 2LO, with transmissions from Birmingham and Manchester starting on the following day.

The first broadcast by the young company, which was heard as grainy, muffled speech, was read by Arthur Burrows, who joined the BBC as director of programmes. Notably, he was one of the first people to move from newspaper to broadcast reporting.

At the end of 1922, Scottish engineer John Reith, who was just 33 years old at the time, was appointed general manager of the BBC, which then had a staff of four. Reith is remembered for establishing the tradition of independent public service broadcasting in the United Kingdom.

Within months, the growing organisation moved into the same building as the Institution of Electrical Engineers at Savoy Hill (now the IET’s Savoy Place event venue), where it continued to expand. This was an obvious home for the young BBC, and for the next nine years this is where early innovations of broadcasting occurred.

The British Broadcasting Corporation, as it is known today, was established in January 1927 as a public corporation, and in 1934 it moved from Savoy Hill to the purpose-built Broadcasting House in Portland Place. [Continue reading…]

CA plans digital radio shift on shortage of frequencies (Business Daily Africa)

Kenyan broadcasters will be allowed to adopt a new digital radio standard, which will enable them to use their current spectrum to transmit their signals through a digital network, as the sector regulator moves to address the shortage of analogue frequencies.

The Communications Authority of Kenya (CA) has called for stakeholder and public views on a draft Digital Sound Broadcasting (DSB) framework it has formulated to ensure the efficient use of the available broadcasting spectrum and encourage investment in the sub-sector.

“The objective of this consultation is to develop a suitable framework for Digital Sound Broadcasting in Kenya to address the challenge of high demand and low availability for analogue FM broadcasting frequencies that is currently being experienced,” said the CA. [Continue reading…]


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Radio Waves: VOA Museum a Historic Marvel, 1BCG Special Event Report, BBC Centenary Celebration, and Czech Radio Turns Off MW and LW

Radio Waves:  Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors David Iurescia, Mark Erdle, and the Southgate ARC for the following tips:


Voice heard ’round the world: Voice of America museum near Cincinnati a historical marvel (The Columbus Dispatch)

WEST CHESTER, Ohio — Imagine, if you will, a voice so strong that it shakes the very foundations of global tyranny.

In the early days of World War II, a group of Americans, including President Franklin Roosevelt, actor and director John Houseman and Cincinnati entrepreneur Powell Crosley Jr. imagined such a voice, one that could counter Nazi propaganda in Hitler’s own backyard.

They named it The Voice of America.

Today, the National Voice of America Museum of Broadcasting, 8070 Tylersville Road, occupies the site from which the service beamed its message around the world for 50 years beginning in 1944, recounting its history and remembering the people, especially Crosley, who made it possible. [Continue reading…]

100th Anniversary Celebration of the First Trans-Atlantic Radio
Transmission of a Message by Amateur Radio (1BCG.org)

Saturday, December 11, 2021

On a cold winter night on December 11, 1921, members of the Radio Club of America were able to send the first amateur radio message from a small shack in Greenwich, CT to be received by American Paul Godley in Ardrossan, Scotland. This transatlantic test proved the value of shorter wavelengths – long considered worthless to long distance communications and through their success ushered in the age of global shortwave radio communications. The 1921 message was sent one-way. Acknowledgment of Paul Godley’s reception of 1BCG’s massage was sent back to the US via the Marconi high power radio transmitter in Wales.

The Antique Wireless Association, in association with the Vintage Radio and communications Museum of Connecticut (VRCMCT) in Windsor, CT, the Radio Club of America, the American Radio Relay League, and the Radio Society of Great Britain, participated in the 100th Anniversary special events held Saturday, December 11, 2021.

For the 75 th anniversary celebration of the 1BCG accomplishment in 1996, AWA members Bob and Mike Raide constructed a replica of the 1921 transmitter. For this 100th celebration, AWA Museum Staff restored the replica. The VRCMCT in Windsor CT has graciously offered to host AWA operation of the replica transmitter during the evening of December 11th. The 1BCG replica transmitter was placed on public display at the VRCMCT Museum during the day of Saturday December 11, 2021. [Continue reading the full report at the 1BCG website…]

Celebrations to mark the BBC’s Centenary began at midday today (1/1/2022) via shortwave radio (Southgate ARC)

BBC Radio 4 announcer/newsreader, Jim Lee, launched special event amateur radio station GB100BBC, from the BBC’s Broadcasting House, in London, at exactly midday.

Listen to the broadcast:
GB100BBC launches 1st Jan 2022
With thanks to the London BBC Radio Group

Within minutes amateur radio stations around the UK and throughout Europe were clamouring to contact the special BBC station and secure a prized entry in the logbook.

The London BBC Radio Group was granted an extended special event radio licence by the regulator OFCOM, to operate the station throughout 2022.

The amateur radio activity is one of many events organised to celebrate 100 years of the BBC, which began broadcasting from Savoy Hill in 1922 as the British Broadcasting Company, moving to the iconic Broadcasting House in 1932, gaining a Royal Charter as the British Broadcasting Corporation.

The London BBC Radio Group has a growing membership which includes engineers, journalists, producers and on-air talent in both TV and Radio. The group is independent but hosted and supported by the Corporation.

The group was launched in 2017 by a handful of radio enthusiasts to revive a long and rich history of amateur radio at the BBC dating back to the Second World War.

The ‘radio shack’ at the BBC’s headquarters, Broadcasting House in central London, was officially opened by the then Director General, Lord Tony Hall, with an over-the-air message of congratulations. Lord Hall was subsequently bestowed Honorary membership of the club. [Click here to read at the Southgate ARC…]

Czech radio switches off MW and LW as 2022 starts (Mike Terry via the Southgate ARC)

Prague (dpa) – Radio reception on medium wave (MW) and long wave (LW) has been history in many parts of Europe for years.

Now, in the Czech Republic, at least the public broadcaster will stop transmitting on MW and LW as the new year starts on Saturday.

The powerful transmitters on the frequencies 270, 639 and 954 kilohertz could also be received in large parts of Germany.

The reason given for the move was the widespread availability of terrestrial digital radio DAB+ and the high costs of broadcasting.

Those still listening using medium waves were to be persuaded to switch with a campaign. The radio station Cesky Rozhlas set up a telephone hotline to answer questions.

It was not known at first whether the transmitters would be retained or used for other purposes.

The antenna of the medium-wave transmitter Liblice B east of Prague is considered the highest structure in the Czech Republic, with a height of 355 metres.

Impuls, the most-listened to private radio station, wants to remain faithful to medium wave for the time being. It broadcasts its second programme, with pop and country music, on analogue transmission.

Click here to read at DPA-International.com.


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Radio Waves: GatesAir Invests in Equatorial Guinea, Community Radio Champion Lorenzo Wilson Milam SK, and GQRP Online Convention

Radio Waves:  Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Tracy Wood, John Figliozzi, Heath Hall and Gérard Koopal for the following tips:


Investment project by North American company GatesAir in digitalisation of Equatorial Guinea (Equatorial Guinea Press and Information Office)

The company GatesAir could invest in a digitalisation project for audiovisual media in Equatorial Guinea in the near future. The information was revealed at the audience that the Vice-President of the Republic, H. E. Teodoro Nguema Obiang Mangue, granted on Friday 7th August, at the People’s palace in Malabo, to the accredited North American Ambassador to Equatorial Guinea, Susan Stevenson.

The willingness of the United States Government was expressed at a bilateral meeting that the Vice-President held with the Ambassador, Susan Stevenson, who came to report to H. E. Teodoro Nguema Obiang Mangue about the interest of the North American company GatesAir in investing in a digitalisation project in the country.

The initiative was well received by Nguema Obiang Mangue, who declared to his interlocutor that Equatorial Guinea has its doors open to any foreign investment.

The Coronavirus pandemic which is currently affecting the whole world also occupied a page on the menu of discussions between Nguema Obiang Mangue and Susan Stevenson.

In addition to this project, Equatorial Guinea and the United States continue to form closer ties in other sectors such as Defence, Education, the Economy and Culture, among others.[]

Lorenzo Wilson Milam, Guru of Community Radio, Is Dead at 86 (NY times)

He helped start noncommercial stations in the 1960s and ’70s, offering an eclectic mix of music and talk. His goal: to change the world.

Lorenzo Wilson Milam, who devoted much of his life to building noncommercial radio stations with eclectic fusions of music, talk and public affairs, died on July 19 at his home in Puerto Escondido, Mexico. He was 86.

[…]Mr. Milam loathed commercial radio stations, which he saw as purveyors of mindless junk. With KRAB and about a dozen other stations that he helped start in the 1960s and ’70s, he created a freewheeling, esoteric vision of commercial-free community radio as the voice of the people it served.

He wanted his stations to have inexperienced contributors, both on and off the air. He encouraged locals to help him program the stations and contribute a few dollars to keep these shoestring operations open.[]

RAE 100 year anniversary specials (Gérard Koopal)

I heard on RAE German that Argentina celebrates 100 years radio in Argentina on august 27th of this year.

This was announced by Rayén Braun the 4th of august on her broadcast show in German.

German listeners are asked to send in a personal message as video or mp3 to this event which will be incorporated in the special broadcast show on this matter.

She points out that more information will be found on the website of RAE. (www.rae.com.ar)

GQRP Club releases agenda for its Online Convention 2020 (Southgate ARC)

The GQRP Club has released a detailed agenda for its Online Convention 2020, taking place on Saturday 5th and Sunday 6th September.

The online event, which replaces the club’s annual GQRP convention at Telford due to current Covid-19 restrictions, is open to existing members. There is a special rate for non-members which will include GQRP Club membership until January 2022.

The two-day event comprises a series of online presentations and knowledge-sharing meetings where people can share ideas.

The packed presentation list includes:

• “Building QRP transceivers” with Hans Summers G0UPL, designer and manufacturer of the QCX QRP transceiver.

• “HF propagation and QRP” with Steve Nichols G0KYA, author and chairman of the RSGB’s Propagation Studies Committee

• “Homebrew SSB Transceivers” with Pete Juliano N6QW, co-presenter of the Soldersmoke podcast and a prolific home brewer.

• “Vector Network analysers explained and the NanoVNA” with Alan Wolke W2AEW, a professional electrical engineer who works for Tektronix.

• “Antennas for QRP” with Callum McCormick M0MCX, YouTube star and inventor and manufacturer of the DX Commander vertical antenna.

• “FT8/FT4 for the QRPer” with Anthony Luscre K8ZT, who will take a detailed look at this the fastest-growing mode in amateur radio.

There will also be range of knowledge-sharing sessions, including “Using Antenna analysers” with Heather M0HMO, “Running a QRP DxPedition” with Dom M1KTA, “Battery technology for QRP portable” with Bill G4ERV, “Omni Directional antennas” with John G8SEQ and many more.

The event costs £4 for GQRP club members. Non-members can also sign up for the event and join the GQRP club for just £10 (or £17 for international participants).

To sign up for the event just go to the Eventbrite sign-up page at: https://www.eventbrite.co.uk/e/gqrp-club-2020-online-convention-tickets-115417887007

For more information and to view the full event schedule see http://www.gqrp.com/convention.htm


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Radio Waves: Switzerland’s Move to Digital, Guyana Rejects USAGM’s Request, Ham Records China/US Encounter, and Farm Radio International Endorsement

Radio Waves:  Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Mike Terry, Dan Robinson, Ulis Fleming, and William Lee for the following tips:


Switzerland Inches Closer to FM Switch-Off (Radio World)

GENEVA — Switzerland is embarking on the next phase of its digital radio switchover strategy. In May René Wehrlin, media specialist at Switzerland’s Federal Office of Communications (Ofcom) announced the country’s next steps toward the country’s total transition to DAB+.

Ofcom officially confirmed in 2019 that the nation would say “adios” to all FM radio programs by the end of 2024 at the latest. At the time, the “Digital Migration” (DigiMig) working group, set up by the Swiss private and public radio sectors and Ofcom in 2013, stated that 68% of radio listening was digital, 37% of which was via DAB+ and 15% exclusively via FM.[]

Guyana refuses US’ request to facilitate radio broadcasts to Venezuela (Demerara Waves)

Guyana’s President David Granger late Friday said his administration rejected a request by the United States (US) to use the medium wave radio frequencies of this South American nation to broadcast Voice of America programmes to Venezuela.

Mr. Granger said Guyana turned down the request because of security, health and political risks that Guyana could expose itself to with Venezuela which is claiming the Essequibo Region that makes up about two-thirds of this former British colony.

“Given the length of an unpoliced western border, the influx of refugees, the unsettled territorial question and the public health risks, it would not be in our national interest to do anything to contribute to destabilising relations at this time,” the President said.

A US Embassy spokeswoman said the American government was no longer interested in the project. ” The U.S Agency for Global Media is not actively considering this anymore. It is important that the people of Venezuela have access to uncensored news from credible Venezuelan and international journalistic news sources. Guyana has shown leadership in the past, in defense of representative government by joining other Lima Group members from the Americas to strive for a democratic resolution to the crisis in Venezuela,” she said.[]

Close encounter between US-China militaries captured by radio amateur (South China Morning Post)

The Chinese navy has warned off a US military plane that briefly flew close to the southern coast of China, north of the Taiwan Strait, according to a Beijing-based think tank.

In a 34-second scratchy radio recording released by the South China Sea Strategic Situation Probing Initiative (SCSPI), a think tank based in Beijing, a man – purported to be a Chinese naval official – can be heard saying in English: “This is China Naval Air Force on guard, you are approaching Chinese air domain, change your course immediately or you will be intercepted.”
He then repeated the warning in Mandarin Chinese.

The institute said on its Twitter account that the recording was captured on Thursday morning by a radio amateur. It remains unclear which aircraft was involved, or if there was any face-off in the air.[]

Charity Intelligence recommends Farm Radio International (Charity Intelligence)

Charity Intelligence is recommending donors support Farm Radio International for the coronavirus pandemic. Farm Radio has a network of over 1,000 radio programs reaching more than 250 million people in 41 countries across Africa.

To donate to Farm Radio’s covid-response

Communication is critical in the early stages of a disease outbreak to give people information. Rumours swirl that Africans cannot get coronavirus. Tanzania’s president, Magufuli, said churches should stay open because the coronavirus is “satanic” and “cannot survive in the body of Christ.” As all have witnessed, fake news has harmful consequences with the quick coronavirus.

Farm Radio International is a Canadian, medium-sized charity with donations of $3.9m in 2018. Typically, a charity of this size would not be front of mind in a global response. Yet Farm Radio has the existing platform and local operations to play an effective role reaching millions quickly in a coronavirus response. Early communication is an urgent need. []


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Video: When “Tomorrow’s World” demonstrated digital radio

Many thanks to SWLing Post contributor, Jason W, who writes:

You might be interested in this episode of the BBC series tomorrow’s world from 17th Feb 1993 on YouTube:

10:23 to 14:50 has a introduction and demonstration of digital radio in the UK and concluding with “the experts say we will be fully digital by 2020 it’s a long wait” (referring to the switch from fm to digital radio in the UK which is yet to happen).

I thought it might be interesting to highlight this on the blog in 2020.

We can forgive the bit where she suggests digital radio will operate alongside analogue FM in the same frequency band. This Wikipedia on the history of digital broadcasting in the UK shows the UK adopted the DAB Eureka 147 standard in a SFN (single frequency network) from the start of test transmissions in 1990.
https://en.m.wikipedia.org/wiki/Digital_radio_in_the_United_Kingdom

The same episode has a later piece on wide-screen digital television. (20:18 to 23:41) ending with the line “like digital radio, it is a few years away” 🙂

This is fantastic! I love watching vintage Tomorrow’s World episodes. It’s great to see how well they predicted the future and what they considered to be meaningful future innovations at the time. Thank you for sharing, Jason!

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Radio Waves: Free Magazine from URE, C-19 Effect on Listening, Ampegon Focuses on Transmitters, and EU Directive for Car Digital Radio

(Source: Ampegon)

Radio Waves:  Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Mike, Paul Evans,  Josh Shepperd, and Mike Terry for the following tips:


Spain’s URE makes June magazine PDF available (Southgate ARC)

In response to the ongoing Coronvirus situation Spain’s national amateur radio society URE is allowing everyone to download the PDF of the June edition of their magazine Radioaficionados

A translation of the announcement on the URE site says:

One more month, and we have already been three, with the aim of accompanying its readers in the exceptional situation caused by the spread of COVID-19, the URE in its commitment to collaborate and help to cope with the complicated situation we are currently experiencing in our country, has decided to offer free access to the magazine of the month of June and we remind you that magazines prior to December 2019 are also available to you. In this way, citizens who wish to can read these publications for free.

A small gesture so that nobody feels alone at home in the face of this global challenge.

Access is through the website download area, click on “Descargas” under “Junio 2020 – Revista” at:
https://www.ure.es/descargas/

URE in Google English
https://tinyurl.com/SpainURE

Ampegon Puts Focus on Shortwave Transmitters (Radio World)

Ampegon Power Electronics highlights progress on the company’s third-generation solid-state shortwave transmitters, which it says will offer “significant advances in efficiency.”

The company says this work will pave the way toward higher-power broadcast outputs and meet current expectations of a shortwave equivalent to medium-wave and FM transmitters. “Combined, these two developments will bring FM-quality broadcasts with all the benefits of shortwave,” said Simon Keens, Ampegon sales and business development manager.

Ampegon has also developed a retrofit upgrade to current UCS generation control systems for previous generation 100 kW, 250 kW, 300 kW and 500 kW transmitter systems.[]

Listening together, listening alone: A music professor sounds off on his shifting industries (CBC)

Brian Fauteux reflects on the way COVID-19 is affecting his two passions: music and teaching

A lot of great songs effectively reflect the feelings that accompany isolation. The experience of being alone, however, is often constructed in opposition to a longing for togetherness. Heart’s “Alone” (1987) — maybe the greatest power ballad ever recorded — confidently asserts, “‘Til now I always got by on my own.” But this is no longer the case when the song’s protagonist meets and develops undeniable feelings for another: “And now it chills me to the bone.” In another iconic 80s anthem, “Dancing in the Dark,” Springsteen grows tired and bored with himself against the desperate urge to join up with “something happening somewhere.” The act of dancing in the dark can be fun, sure, but it’s much more fun with others. Inspiration in isolation is insubstantial.

I’m an Assistant Professor of Popular Music and Media Studies, and I teach and write about the role of music in society. I’m interested in how our listening practices shape, and are shaped by, issues of sustainability in the music industries — that is, how artists make (or struggle to make) a living in this day and age.[]

EU directive on digital radio in cars (Times of Malta)

Directive (EU) 2018/1972 of the European Parliament and of the Council of December 11, 2018, establishing the European Electronic Communications Code (‘EECC’) entered into force on December 20, 2018. Member states have two years to incorporate it into national law, except where specifically mentioned.

Radio is an important medium through which citizens access a diverse range of information news and entertainment services. The EECC leverages on the ever-increasing connectivity of new generation cars as well as on the digital platforms of radio broadcasters to guarantee a more robust radio experience to all drivers, ensuring good coverage, a wider choice of radio stations and more effective access to information at all times. The EECC ensures that car drivers have access to the benefits of digital terrestrial radio wherever in the EU they have bought their new car.

On April 21, the minister responsible for communications, in consultation with the Malta Communications Authority, published Legal Notice 151 of 2020 amending the Electronic Communications Network and Services (General) Regulations, implementing the provision of the EECC dealing with the interoperability of car radio devices. In line with the regulation, any car radio receiver integrated in a new vehicle of category M which is made available on the market for sale or rent in Malta from December 21, 2020, shall comprise a receiver capable of receiving and reproducing at least radio services provided by digital terrestrial radio broadcasting of type DAB+. Radio programmes in Malta are broadcast terrestrially on DAB+.

The car radio requirement only applies to new cars.[]


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FCC to consider allowing AM broadcasters to transition to digital

(Source: Radio World)

All-Digital on the AM Band? The FCC Might Allow It Soon

AM radio station operators in the United States may soon have the option of switching their transmissions to all-digital.

It’s not a done deal; but the concept is about to take a step closer to reality, because the Federal Communications Commission will consider a proposal at its next meeting that would start a process. It will take comments on whether to allow AM band licensees to make the switch if they want.

Ben Downs, VP/GM of Bryan Broadcasting in Texas, petitioned the FCC in March to initiate a proceeding to authorize the all-digital mode of HD Radio.

Allowing stations to use all-digital transmission is an idea that some broadcasters feel could give business-challenged AM stations in the United States new life or at least another option. Turning off their analog signals would mean that most existing receivers could no longer pick up that signal; but many AM broadcasters are currently heard on FM translator simulcasts now. And adding the all-digital AM option could open up new possibilities for them as the number of digital receivers in the marketplace continues to grow.

[…]Chairman Ajit Pai described the proposal in a blog post Monday: “Just as the FCC is trying to keep pace with changes in the market, so are AM radio operators, and the commission wants to give them as much flexibility as possible to compete in the digital age,” Pai wrote.[…]

Read the full article at Radio World.

Click here to read the proposal (PDF) that will be discussed at the November FCC meeting.

The Radio World article mentions WWFD in Frederick, MD–a station that has been broadcasting AM digital for over a year. We posted a note about this last year and I even included a short recording/video with reception when traveling through the area.

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