Category Archives: FM

Radio Waves: Hamvention Attendance Record, WWII Codebook, TuneIn for AM Stations, and 101 Years of Chicago Radio

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!

Many thanks to SWLing Post contributors Dennis Dura, Ron Chester, and Ulis Fleming for the following tips:


Hamvention 2023 breaks attendance record (WHIO)

XENIA — A new attendance record was set at Hamvention this year.

This year 33,861 people flooded to the Greene County Fairground and Expo Center for the world’s biggest amateur radio show, according to a spokesperson for Hamvention.

The number surpassed the previous record by more than 1,300 people. It’s also more than 2,000 greater than last year’s attendance.

This year’s Hamvention ran May 19-21 and brought in people from across the globe.

“Things went very smoothly due to the dedication and hard work of close to 700 volunteers,” Jim Storms, Hamvention General Manager, said.

Hamvention 2024 is scheduled for May 17-19. [Watch report on WHIO…]

Man’s WW2 codebook unearths St Erth’s ‘best-kept secret’ (BBC)

A retired schoolteacher is shedding light on an “ultra secret” World War Two listening station in Cornwall.

Mike Griffiths unearthed the secret existence of the MI6 outstation in St Erth when his late father, Harry Griffiths, left him his code book.

He has revealed the role his father and others played in providing intelligence for code-breakers at Bletchley Park.

Mr Griffiths said he “couldn’t be prouder” of what his father achieved. Continue reading

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Radio Waves: Sri Lanka DRM, Czech Radio, Ham Radio Ops Ready for Disaster, Space Pirates, FM Not Far Behind AM, and AM Hearing Live Today

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!

Many thanks to SWLing Post contributors Dennis Dura, David Iurescia, John Palmer, Gareth Buxton, and Mangosman for the following tips:


Sri Lankan Broadcaster Goes DRM Following Listeners’ Request (DRM Consortium)

The international service of the Sri Lankan Sri Lanka Broadcasting Corporation (SLBC) recently doubled its Tamil Service airtime to two hours, on 873 kHz AM (medium wave) from Puttalam transmitter. The new schedule is 0130-0330 UTC (7.00 am to 9.00 am IST). This is partly in response to individual efforts of listeners, many in the southern part of India, in Bengaluru. Introducing this change, Colombo International Radio also announced that shortly they are going to use DRM on 1548 kHz! This will be done by is using the old transmitter of Deutsche Welle located in the north of Sri Lanka at Trincomalee. The Sri Lankan public broadcaster has started airing the DRM announcement:

The publicity for the new DRM service is in full swing. See video:

Czech Radio centenary: Listeners send congratulations (Czech Radio)

On the occasion of Czech Radio’s centenary, we asked our listeners to let us know where they heard our special programme on that day in order to map Radio Prague International’s broadcast reach today. Here are at least some of the many letters and photos which you have sent us. Thank you to all our loyal fans.

George Jolly, who was listening to our special programme over the internet, wrote from Houston, Texas:

“Thank you so much for the special program today celebrating your 100 years of radio. If I were not so far away, I would surely visit you on Saturday. It means a lot to me that you continue the tradition of the ‘radio magazine’. Hearing the opera excerpt and other recordings from the past was wonderful!

“I love old music and old technology like radio, and I love that you are keeping their spirit alive and new again for today’s world. I am so grateful to celebrate your centenary with you from afar.”

Another listener from the United States is Timothy Marecki, who wrote us from New Port Richey in Florida: Continue reading

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Don Moore’s Photo Album: Western Venezuela

Many thanks to SWLing Post contributor, Don Moore–noted author, traveler, and DXer–for the latest installment of his Photo Album guest post series:


Don Moore’s Photo Album: Western Venezuela

by Don Moore

I started this series several months ago with pictures of Ecos del Torbes and other stations in San Cristóbal, Venezuela. This time I want to take you to the other places I visited on that trip to Andean Venezuela in January 1995.

When I started DXing in the early 1970s, Venezuelans were the most commonly heard Latin American shortwave stations. The 90- and 60-meter bands were full of them and there were more than a few to be heard in the 49- and even 31-meter bands. But the Venezuelans began abandoning shortwave before other countries in the region and by the late 1970s their numbers had been considerably thinned. Only a handful remained in the early 1990s.

This radio dial [click to enlarge] goes back to a time when Latin American stations were found all over the radio bands.

One of the last Venezuelan stations to leave shortwave in the 1990s was Radio Valera in the busy commercial city of Valera.

For decades, Radio Valera was one of the best heard and most consistent Venezuelan stations on 60 meters. Roque Torres Aguilar, waving on the left side, was station manager at the time of my visit.

I’ve found listings in DX publications for their 4840 kHz frequency as far back as 1946.

I was given this 59th anniversary key chain when I visited Radio Valera in January 1995. So the station must have begun around 1935.

Station studio in 1995.

A second shortwave station in the state of Trujillo was Radio Trujillo in the nearby town of the same name. Broadcasting on 3295 kHz, they were one of the easier catches in the 90-meter band in the early 1970s but were gone by the late 1970s. Continue reading

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Carlos’ FM DX in a Flight Over Europe and North Africa

(Photo by Maria Sleptsova)

Many thanks to SWLing Post contributor, Carlos Latuff, who shares the following FM radio recordings made while flying over northwest Africa. Carlos writes:

Flying over Northwest Africa towards Paris yesterday I managed to listen and record FM stations from countries like Senegal, Mauritania, Morocco and Spain, at an altitude of 10668 meters, using the native FM radio of my cell phone. Interesting thing is that it was only possible when I got close to the plane emergency exit. Back to my seat I wasn’t able to listen.

94.3 FM, Senegal, May 11, 2023:

95.0 FM,  SNRT Amz Morocco, May 11, 2023:

101.7 FM, Spain, May 11, 2023:

91.0 FM, Mauritania, May 11, 2023:

Thank you for sharing this, Carlos. Impressive reception from your cell phone’s FM receiver!

Without fail, I always try to listen to FM stations as I fly. This also reminds me of a post from our archives when Ivan used a small SDR to DX while on a flight

Thank you again and happy travels!

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Radio Waves: Loss of AM in Cars, AM Radio Op Ed, BBC Sues Over Loss of Service, and Czech Radio Celebrates Centennial

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!

Many thanks to SWLing Post contributors Dennis Dura, Dave Porter, and David Iurescia for the following tips:


NASBA on Loss of AM in Cars: “1,300 AM Stations Could Be Left in the Dark” (Radio World)

State association questionnaire finds one in three AM stations have no FM translator

The National Alliance of State Broadcasters Association (NASBA) is reporting insights it discovered after polling AM stations about the removal of over-the-air AM in new cars.

The data collected from more than 1,000 AM stations shows that many do not have an FM translator and/or do not stream their signals over internet connections, NASBA says. The group is hoping to use the information to rally proponents of AM to help convince companies like Ford, Mazda, BMW and others to keep reception of AM in their new vehicles.

NASBA says the automakers “are cutting corners on expensive new electric vehicles” by eliminating AM radios, which means more than 4,000 AM stations in the United States are at risk. But its survey results show that AM radio across the country provides a diverse mix of music and talk and is a vital link for millions of listeners. [Continue reading…]

Letter: AM’s Downfall Is Poor Programming, Not Audio Quality (Radio World)

“It was the music without the spots, that made FM,” says a reader

The comments written by Dave Bialik in the latest Radio World hits the nail right on the head. The average person, which is about 95% of the population, couldn’t care less about audio fidelity. The days of “audiophiles” are gone. The downturn of AM listenership is almost exclusively due to poor programming, poor content. Yes, FM in its early days was mostly easy listening, beautiful music and classical music. It catered to the audiophiles, and had a very limited audience even though it sounded great and in 1963 by offering multiplex stereo.

Once a few of the FM guys realized people were fed up with the 45 minute commercial breaks on AM stations with popular music, the format was adopted on FM, but with none or few commercials (because no one wanted to advertise on FM). Once people found out they could get the rock and pop music on FM without all the talk, the band switch started taking place. It had nothing to do with audio — remember at this time people were buying 8-track tapes by the millions and they were technically several steps below AM radio. It was the music without the spots, that made FM. Once that happened, most of the large and middle market stations threw all of their eggs into the FM basket and put something on the AM just to hold the license.

I once worked for an AM station owned by one of the large groups. In its heyday, in the 50’s–70’s, it was THE top 40 station. In a market of 40 stations, it had a 60 share. Once the group owners bought a big FM signal, they blew the AM away and loaded it with satellite talk. After a few years, that 60 share was .5 — yes point 5. After a few years of this, and it becoming unsellable, one of the staff suggested to management that they should go back to a music format playing the hits of the 50’s and 60’s (this was in 2002). [Continue reading…]

BBC sues over fire that left one million licence fee payers without TV (The Telegraph via MSN)

The BBC is suing the owner of a huge telecoms mast that burnt down almost two years ago, leaving more than one million households without TV or radio services.

A blaze destroyed the Bilsdale transmitter on the North York Moors in August 2021, sparking chaos across the region.

More than one million homes in North Yorkshire, Teesside and County Durham were unable to access FM radio or Freeview, with many disconnected for months.

The BBC has now filed a lawsuit against Arqiva, the company which owns the mast, saying it has failed to fully restore services more than 18 months later.

The public service broadcaster has accused the infrastructure group of breach of contract and is seeking tens of millions of pounds in damages. [Continue reading…]

A hundred years is just the beginning. Czech Radio celebrates its centennial (Czech Radio)

Czech Radio celebrates a significant anniversary this year. 18 May 2023 marks exactly 100 years since the start of regular radio broadcasting in the Czech Republic, then Czechoslovakia, when the private company Radiojournal began broadcasting from a humble scout tent in Prague’s Kbely.

For the occasion of its monumental jubilee, Czech Radio has prepared a rich programme for the public, new broadcasting highlights and a unique exhibition at the National Technical Museum. Celebrations throughout the year will illustrate the remarkable journey of the most trusted public service media in the Czech Republic.

“Czech Radio will celebrate the 100th anniversary of the start of regular broadcasting. It is an honour for me to be at the helm of this public institution at a time when we are recapitulating important past moments, revisiting our history and remembering outstanding radio personalities. But this extraordinary anniversary is also an opportunity for us to show that 100 years of radio broadcasting is only the beginning. We are ready to launch the next century of our existence with new programming projects and technological innovations. The entire project of our anniversary celebrations aims to support the position of Czech Radio on the media market and also to show that it is an important partner for other institutions. I believe that with an imaginative programme we will not only delight current listeners, but also attract new ones,” said René Zavoral, Director General.

The celebrations will officially commence on 10 March with a formal ball at the Municipal House in Prague, where the Czech Radio Symphony Orchestra, the Gustav Brom Radio Big Band and musical guests Ewa Farna, Mirai, Dara Rolins and No Name will perform.

On the day of its 100th birthday, Czech Radio will hold a grand concert in the Riegrovy Sady park for listeners and the general public. The concert will include performances by the band Chinaski, as well as musicians Aneta Langerová, Mirai Navrátil and Marek Ztracený, who will be the first performer broadcast on Czech Radio in its second century of existence. [Continue reading…]


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Chasing Low-Power FM Stations

By Jock Elliott, KB2GOM

Male voice, singing: You’re the reason I have bald tires on my car . . .

Female voice, singing: You’re the reason I threw your clothes out in the yard . . .

Male and female voices singing in harmony: You’re the reason our kids are ugly . . .

. . . and that was my introduction to WOOG low-power community radio in Troy, NY.

Holy smokes . . . that’s outrageous . . . and funny, too!

Sometimes, in hindsight, it can be difficult for a writer to determine when and where  story actually began.

With this one, was it when the FCC began licensing low-power community radio stations in 2000? Or was it when I began hosting a Radio Monitoring Net on the local 146.94 repeater (Troy, NY) at 7 pm on Tuesday nights?

For sure, a tipping point was when one of the net participants suggested check out a low-power FM community radio station on 92.7 FM. It’s kind of like western swing, he said.

I did check it out and found it to be a combo of traditional country and what I call “hillbilly jazz.” No announcer between musical selections, and occasional station IDs. At 7 am, I heard the Ralph Nader radio hour. Allegedly it is licensed to the Oakwood Community Center in Troy, NY, but nothing on the air that I have heard suggests that connection. Very curious. Is a place-holder for something else?

It turns out there are hundreds of low-power community radio stations across the United States. They are limited to 100 watts and an antenna height of 30 meters (100 feet). According to the FCC:

To qualify for an LPFM license, you must be:

  • A government or non-profit educational institution, like a public or private school or state or private university
  • A non-profit organization, association or entity with an educational purpose, like a community group, public service or public health organization, disability service provider or faith-based organization
  • A government or non-profit entity providing local public safety or transportation service, like a volunteer fire department, local government or state transportation authority
  • An Indian or Alaska Native tribe, band, nation, pueblo, village or community that will provide non-commercial radio services.

In addition, applicants for LPFM licenses must be based in the community in which they intend to broadcast. An organization is considered community-based if:

  • It is physically headquartered or has a campus within 10 miles of the proposed transmitting antenna
  • Seventy-five percent of its governing board resides within 10 miles of the proposed transmitting antenna
  • It is a non-profit or governmental public safety organization that intends to broadcast within the area of its jurisdiction
  • In the case of a Tribal application, the applicant’s Tribal lands are within the service area of the proposed station.

There is an article about LPFM stations here: https://www.pewresearch.org/short-reads/2016/09/19/number-of-u-s-low-power-fm-radio-stations-has-nearly-doubled-since-2014/ and a listing of the stations here: https://en.wikipedia.org/wiki/Category:Low-power_FM_radio_stations_in_the_United_States

There are several LPFM stations in my area, and chasing them is fun. I found the best success with my Tecsun PL-880 and its long whip antenna. Sometimes the whip works best when held vertically; sometimes, horizontally; sometimes moving the whip horizontally as little as 45 degrees will blank one station and bring up another. The end effect is to look like a drunken sword master while getting into the Better Half’s potted plants, knocking over scanners on the desk, and other encounters with the long whip.

Nevertheless, chasing low power community radio stations is fun, and I can predict, with some authority, that you may encounter programming that you won’t find anywhere else.

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DX Central Announces Inaugural Grand Slam DX Challenge!

Many thanks to SWLing Post contributor, Loyd Van Horn, who shares the following announcement:


DX Central Announces Inaugural Grand Slam DX Challenge

Chances are, if you ask a DXer how they began their love of DX, many will tell you it all began by searching through the static for the unmistakable sounds of baseball.

Radio and baseball have been intrinsically tied together since the early days of both. In fact, radio broadcasts of baseball games, long before the days of television, are what helped to turn it into “America’s National Pastime.”

It is with that history in mind that we are pleased to announce the inaugural Grand Slam DX Challenge.

Originating from an idea between DX Central’s Loyd Van Horn (W4LVH) and Sean Kutzko (KX9X), the Grand Slam DX Challenge (GSDXC) once again honors the link between radio and baseball by challenging hobbyists to log as many radio stations, from as many Major League Baseball teams, as possible during the MLB regular season.

“I knew I wanted to have some sort of challenge,” says Van Horn. “I just wasn’t sure exactly what or how that would work. Then Sean came to me with the idea of doing something around the baseball season and I thought ‘that’s genius!’”

The notion of tying America’s game with DXing came naturally to Kutzko.

“My love for baseball goes back probably on par with the same time that I got interested in AM DXing as a really, really small kid,” says Kutzko. “[The challenge] is a multi-month event focused around the two greatest things that I spend my time with which is radio and baseball.”

To help turn this idea into reality, Kutzko brought his experience building the ARRL’s National Parks on the Air (NPOTA) program in 2016 for the amateur radio community. In addition, Kutzko and Van Horn teamed up with Mike Leary (K7MSO), an experienced web developer and radio hobbyist, who volunteered his time and skills to the project.

The premise is simple: a participant should try to receive as many stations – and from as many different Major League Baseball teams – as possible. The broadcasts must be from the team-sanctioned radio network broadcast (national broadcasts from networks such as ESPN, Westwood One, etc. do not count).

There are nine entry categories that a participant can choose from, and include AM only, FM only or both AM and FM submissions.

Submissions for the challenge will be through the challenge Web site: grandslamdxchallenge.com. The full rules and scoring system for the challenge also available on the same site.

It is important to note that this inaugural edition of the challenge is a true beta version. Feedback from the community will be critical for resolving any defects or making any improvements for future iterations of the challenge.

“I just hope that this is something people will really be able to enjoy, perhaps even remind them of why they fell in love with radio in the first place,” says Van Horn. “With the Sporadic Es season coming for FM and the unique propagation opportunities that often occur during summer on AM, there should be plenty here to keep DXers glued to their radios throughout the summer!”

Click here to check out the Grand Slam DX Challenge website and register!

Livestream Video:

Click here to view on YouTube.

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