Shortwave listening and everything radio including reviews, broadcasting, ham radio, field operation, DXing, maker kits, travel, emergency gear, events, and more
Many thanks to SWLing Post contributor, Dennis Dura, who shares a link to this radio project by Emanuele Pizzolorusso who wishes to combine a modern Internet radio with old-school city-labeled memory buttons. From Wallpaper.com:
CityRadio, designed by Emanuele Pizzolorusso for Italian design brand Palomar, allows you to access local radio around the world, with a simple – and satisfying – click of a physical button. It’s a contemporary re-imagination of radio’s early history, where city names where displayed to identify frequencies. As travel looks to remain restricted for the time being, get your multicultural fix through the airwaves.
Of course, you can go online and access local radio anywhere fairly easily, but for Pizzolorusso, there’s a certain romanticism to, and interconnection with, the act of listening physical object. ‘In my childhood home there was an old portable radio, one of those appliances that had the names of several European cities on the tuning dials – a feature from the time when one could still listen to stations from foreign countries,’ explains the Italian designer, who is based in Helskinki. ‘The list of those places, which to me as a child appeared so mysterious and exotic, stimulated my imagination and gave that ordinary forgotten object a deep sense of magic.’
Press magnetic keys to access 18 different cities around the world – from Barcelona to Beijing, Nairobi to New York.[…]
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’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors Tracy Wood, Dennis Dura, David Goren, and Kim Elliott for the following tips:
Dame Vera Lynn, who has died at the age of 103, was Britain’s wartime Forces’ Sweetheart, and remained one of the country’s most potent symbols of resilience and hope.
With songs such as We’ll Meet Again and The White Cliffs of Dover, she inspired both troops abroad and civilians at home during World War Two.
As Britain’s cities came under attack, her wistful songs, with their messages of yearning and optimism, were heard in millions of British homes.
And 75 years later, the country turned to her once again as it faced another stern test.[…]
THERE ARE NO BBC radio recordings surviving from before 1931, so the job of representing the 1920s falls to this curiosity from the Columbia Graphophone Company. It’s a 12” 78rpm disc made in 1928 in association with the Daily Mail newspaper.
It seems likely that the disc was somehow tied in with a Daily Mail campaign over urban traffic noise. The commentator on both sides of the disc is a man named Commander Daniel and he doesn’t approve of everything he hears in the city streets.
The recordings were made from single, static locations in Leicester Square and Beauchamp Place on Tuesday 11th and Thursday 20th September respectively. Columbia probably used a recording van equipped with a disc-cutter.[…]
When Michael Pack takes over as the first politically-appointed CEO of the U.S. Agency for Global Media, his first task will be to comprehend the bewildering array of international broadcasting entities under the USAGM. This includes two government agencies: Voice of America and Office of Cuba Broadcasting (Radio and TV Martí), and four government funded corporations: Radio Free Europe/Radio Liberty, Radio Free Asia, Middle East Broadcasting Networks (the Arabic-language Alhurra and Radio Sawa) and the anti-censorship Open Technology Fund. Within this structure are broadcasting outlets that straddle two entities, such as the Russian-language Current TV. All told, the entities distribute content in 61 languages.
When past that hurdle, Pack must then decide if he wants to maintain the journalistic independence of USAGM’s entities, or if he wants to move them towards advocacy of the administration’s policies.[…]
High-frequency traders will famously do almost anything to get the latest market data and send their buy and sell orders a few milliseconds ahead of the competition. They blasted through mountains to build the most direct fiber-optic routes possible between exchanges in a competition that transformed global markets and was made famous by Michael Lewis’s book Flash Boys. Soon, pinging light through glass fiber at more than 124,000 miles per second wasn’t fast enough—the glass slows things down—so traders moved on to microwave transmitters that send signals through the air.
But that has problems, too. Microwaves travel only roughly as far as the eye can see before they peter out and need a signal boost. Now two rival market telecommunications companies have signed a pact that they say will give traders more access to experimental wireless signals which can travel across oceans.
To do that, signals need a longer wavelength—known as a shortwave rather than microwave—that bounces between the water and atmosphere. It’s an imperfect solution. The waves can handle only a fraction of the data that fiber can, carrying about a kilobit per second vs. gigabits. And some signals can be lost.
Raft Technologies Inc., a startup based in Tel Aviv, says the trade-offs are worth it. Raft says it can send data over shortwave from Chicago to Frankfurt in 31.4 milliseconds, which it says is about 4.5 milliseconds faster than the best available fiber route. That’s an eternity in an industry that tends to measure improvements by the thousandth of a millisecond. The company says the signal is about 85% reliable, compared with 100% for fiber. Clients can use a fiber line in parallel as a fail-safe measure.[…]
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’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors Dennis Dura, Martin Butera, and Dan Van Hoy for the following tips:
With 39 states beginning to relax restrictions imposed to diminish the spread of the coronavirus, many Americans are ready to pick up the pieces and get back to their previous lifestyles. An online survey of 1,000 persons aged 18+, conducted from April 30-May 2, found nearly two thirds (63%) say they plan to resume normal activities next month. Conducted by Nielsen, the survey also shows heavy radio listeners are key to driving commerce and supporting the economy since they’re more likely to go out and shop once COVID-19 eases in their market.
Presenting the findings during a client webinar Friday afternoon, Tony Hereau, Nielsen VP of Cross-Platform Insights, summed up the top takeaway succinctly: “AM/FM radio is the soundtrack of America’s re-opening and reemergence.”[…]
Marajo Dxcamp updates
Ivan Dias and Martin Butera inform us about their most recent update on the receptions of the last DXcamp on the Amazonian Island of Marajo, in the north of Brazil.
Be sure to visit the official website of the Dxcamp, where you will find a lot of material about this important event https://dxcamp-marajo2019.blogspot.com/
LONDON — Last Wednesday, Steve Coulby, a D.J. for Nottingham Hospitals Radio in England, read out a request from a patient battling Covid-19.
“Brian, you’ve given me an awesome responsibly, as you’ve asked for ‘any jazz,’” Mr. Coulby said. “I have to admit,” he added, “what I know about jazz is limited.”
Mr. Coulby then told his listeners he’d spent much of the day searching jazz tracks online, looking for one that might aid Brian’s recovery, or at least lift his mood. He decided on “Let Me Into Your Heart” by the British singer Isaac Waddington.
“I hope it’s good enough, Brian,” Mr. Coulby said, with a nervous laugh. “To be honest, it’s all you’re getting.”
Britain’s hospital radio stations are one of the less well-known features of its health system: tiny operations, staffed by volunteers, that you would never know existed unless you’d been a patient here.
Patients can normally listen to the shows, which are heavy on chart music and old hits, using headphones connected to an entertainment unit beside their beds. In some cases, the shows are even played out of speakers on the wards or in the emergency room waiting area.
The end of hospital radio has been declared many times over in Britain. Some hospital stations have struggled to raise funds, while the rise of smartphones filled with music and radio apps has meant patients have less need for them. But there are still over 200 such stations, according to the Hospital Broadcasting Association, and some claim they have found themselves more useful than ever during the pandemic, providing a human connections to patients who would otherwise be alone.[…]
Let’s celebrate the many years we have all had at the Great Gathering we call Hamvention. We also want to remember Ron Moorefield W8ILC who never missed a Hamvention and contributed to our club until his recent death.Let’s light up the airwaves with our remembrances of Hamventions of the past! See you on the air! K3LR, Tim Duffy and W8CI, Michael Kalter.
Here is the deal: 12 hour event, 8 a.m. to 8 p.m. EDST on Saturday of Hamvention May 16, 2020. Operate CW or SSB on 160, 80, 40, 20, 15 and 10 meters. The exchange is a signal report and first year you attended Hamvention. If you have never attended Hamvention you send 2020.
Send your score (number of QSOs) to 3830scores.com within 5 days of the event. You can print a certificate on line via www.HVQP.org. More details will appear on the Hamvention QSO Party web site being set up now.
Special bonus: W8BI, the club call of the Dayton Amateur Radio Association (DARA is the host of Hamvention) will be activated by designated DARA members from their home stations. You can add 10 points for each band/mode QSO with W8BI (12 available). So you can earn 120 bonus points (like having 120 additional QSOs).
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’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors Dennis Dura, Mike Terry and the International Radio Report for the following tips:
Streaming means we can tune into breakfast shows, travel bulletins and local gossip on every continent – and revel in radio’s ability to create a sense of community
I’d missed the joke about the three-legged chicken. It was causing a stir.
“That one about the chicken with three legs you told yesterday,” said a presenter on Ireland’s Midwest Radio’s afternoon show, “apparently Ronald Reagan told it first.”
“Did he, now?” the co-host replied.
“Yes. You stole a joke from Ronald Reagan.”
Jeez, I’m going as red as a tomato here.”
The conjunction of tripedal fowl, the 40th president of the United States and two men in a studio in Ballyhaunis, County Mayo, will never make a list of great radio moments but it was enough to coax me from between my four walls, even if it was via the imagination.
Radio has never been more popular: it’s seen off challenges, from television to the internet, to become stronger than ever. In 2017, according to industry ratings body Rajar, nine out of 10 people in the UK listened to the radio every week. Perhaps it succeeds because we have to conjure up our own pictures of events and places beyond our immediate surroundings. As a bored, lonely boy growing up in an anonymous south-east London suburb, I’d spend most evenings in my bedroom jamming a coathanger into the back of an old radio and scanning the airwaves, awestruck by the range of languages and music bursting out of the night through skirling static; each voice sending tantalising reassurance of a world beyond the dispiriting confines of my own.[…]
The BBC has said it will have to “think hard about every pound” it spends on new programmes because of financial pressures during the current lockdown.
Delays to a new licence fee regime for people over 75 and problems collecting fees are among the challenges cited.
Staff have been told the BBC will have to find £125m savings this year.
Senior leaders will take a pay freeze until August 2021 and all non-essential recruitment will be put on hold as part of the cost-cutting measures.
Staff will also be invited to work part time or take unpaid leave if they find it “helpful” during the lockdown.
In a briefing on Wednesday, director general Tony Hall said other reasons behind the cash shortfall were a delay to a plan to cut 450 jobs, and uncertainty around commercial revenues.
Other broadcasters have been badly hit during the crisis, with ITV last month cutting its programme budget by £100m and Channel 4 cutting £150m from its programming.
On Wednesday, Channel 4’s director of programmes Ian Katz said the broadcaster would have to cut back on drama and produce “lower tariff” shows.[…]
With the passing of Ronan O’Rahilly in April 2020, a colossus of radio broadcasting has left a legacy that will stand the test of time and has made a massive impression on radio broadcasting in Ireland. While his beloved Radio Caroline was a familiar sight off the South East of England, its influence on both radio and music in 1960’s Britain cannot be underestimated. It forced the British Government to enact new legislation outlawing the almost a dozen pirate radio ships that blasted pop music into Britain and it forced the BBC to reorganise and compete with the opening of a dedicated pop channel in 1967, BBC Radio One. In the month when Ronan passed onto the afterlife, both BBC Radio One and Radio Caroline still broadcast today. But while Caroline’s history focusses mainly on its influence on Britain, Ireland has played a key role in that colourful history and this is that story.
At the helm of Radio Caroline was Ronan O’Rahilly. He was born in Clondalkin, Dublin in 1940, his father Aodogan was a well-known and wealthy businessman, regarded as an influential ally of Eamon DeValera, while his grandfather Michael O’Rahilly was better known as The O’Rahilly, sacrificed his life during the 1916 Easter Rising having been shot dead while leading a charge on a British position at the end of Moore Street.[…]
ARISS News Release No. 20-03
April 28, 2020 —Amateur Radio on the International Space Station (ARISS) is pleased to announce the first use of a concept called Multipoint Telebridge Contact via Amateur Radio, allowing school contacts for Stay-At-Home students and simultaneous reception by families, school faculty and the public.
During the last several weeks, efforts to contain the spread of the COVID-19 virus have resulted in massive school closures worldwide. In addition, the Stay-At-Home policies invoked by authorities, initially shut down opportunities for ARISS school contacts for the near future.
To circumvent these challenges and keep students and the public safe, ARISS is introducing the Multipoint Telebridge Contact via Amateur Radio concept. First operation of this experimental system will occur during a contact scheduled with a group of Northern Virginia Students located in Woodbridge, VA on Thursday, April 30 at 13:35 UTC (9:35 EDT). During this event, an ARISS telebridge radio ground station will link to the astronaut on the International Space Station (ISS) ham radio station and each Stay-At-Home student and their teacher will be individually linked to the telebridge station. Under the teacher’s direction, each student, from their home, takes a turn asking their question of the astronaut.
Quoting ARISS Chair Frank Bauer, “This approach is a huge pivot for ARISS, but we feel it is a great strategic move for ARISS. In these times of isolation due to the virus, these ARISS connections provide a fantastic psychological boost to students, families, educators and the public. And they continue our long-standing efforts to inspire, engage and educate student in STEAM subjects and encourage them to pursue STEAM careers.”
ARISS is inviting the public to view a live stream of the upcoming contact at its new ARISS YouTube Channel: https://youtu.be/Cu8I9ose4Vo.
During the contact, participants will ask as many of the following questions as time allows:
1. What does the sun look like from outer space?
2. How comfortable is it to sleep in space?
3. What is one thing you want to eat when you get back to earth?
4. I’ve heard that stars are red, yellow and blue. Can you see those colors in space when you look at the stars?
5. Besides your family, what do you miss most while being in space?
6. What are your thoughts on our Covid-19 situation right now? Does the Earth look differently over the last 3 months now that many people are inside and not creating pollution?
7. How often do you get to go out of the ISS? Have you been on any space walks?
8. Who makes the rocket that takes you to the ISS?
9. What does it feel like to float all the time?
10. Do you use flashlights on space walks?
11. How do you exercise in space?
12. How do you get out for space walks safely without the air from the ISS coming out into space? How does it feel to walk in space?
13. What do you wear in the space station?
14. How did it feel when you first got to space?
15. How is space different from Earth?
16. What do you study in school to become an astronaut?
17. What do you like the most about being in space?
18. Were you nervous when you launched into space?
19. How do you communicate with loved ones while you are in space?
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’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors Alan Hughes, Michael Bird, Zack Schindler, and Dennis Dura for the following tips:
Radio Marti began Digital Radio Mondiale (DRM) shortwave transmissions on Feb. 4. Part of the U.S. Agency for Global Media (USAGM), Radio Marti broadcasts news and other programs to Cuba. The DRM shortwave transmissions are from USAGM’s Greenville, North Carolina, site.
USAGM has transmitted in DRM before. There were some transmissions from Briech, Morocco, in the early 2000s. Greenville tested DRM in 2009 in partnership with what was then known as HCJB Global Technology. So why are they back now after an absence of over a decade?
“We want to experiment a bit with different modes and services available on DRM. We also want to help push the development of low-cost receivers and the best way to do that is to put some transmissions on the air, explains Gerhard Straub, director of USAGM’s Broadcast Technologies Division.[…]
Amateur radio enthusiasts are pushing for the former site of Radio Australia in Shepparton North to be upgraded and retained as a national museum of radio broadcast history.
Members of the Shepparton and District Amateur Radio Club and The Vintage Radio Club of North East Victoria are due to present a 25-page proposal to an anonymous consortium of buyers said to be interested in acquiring a 258ha block of land along Verney Rd.
The block includes two buildings and several large broadcast towers on the former site of Radio Australia. The site is currently owned by BAI Communications.
The Shepparton club’s assistant secretary, Geoff Angus, said the proposal would be presented to Greater Shepparton City Council for forwarding to the consortium.[…]
APRS usage seen on the History Channel “Secret of Skinwalker Ranch”
Zack Schindler writes:
I have been watching a show about paranormal activity on the History Channel called The Secret of Skinwalker Ranch. In the episode this week they hired a professor to do a balloon launch with some RF sensors. In this episode they also showed the APRS.FI webpage and I was able to read his callsign from an APRS tracker, KM4MRH.
The professor used an APRS tracking device. On the right side of the page link below you can click on Other SSID’s to see other balloon launches he has done. Normally when there is a balloon launch you can see the data from it going up and down. This page shows the Skinwalker balloon launch data transposed over a map. https://aprs.fi/#!call=a%2FKM4MRH-3&timerange=3600&tail=3600
Sadly they are using these for measuring RF fields rather than these.
Terrestrial music stations have a major cultural opportunity right now, but employees say a muddied strategy is standing in the way
Radio personality Kevin Ryder was “baffled” by KROQ’s “cold, heartless attitude” when he and his morning-show team were fired at the end of March. The station has long been an alternative/rock staple in Los Angeles, the second-largest market in the country, and Ryder had been on the air for more than 30 years.
“The new people in charge now weren’t here for the building of the world-famous KROQ,” Ryder, one-half of the popular Kevin & Bean Show, said on air when the station let him go, live one final time. “I don’t think it means anything to them. It’s a numbers business, and there’s no family aspect to it anymore. It’s only numbers, but this place was built without numbers. It was musicians, artists, and the special relationship between music, the station, and our fans.”
AM/FM radio provides localized, round-the-clock information and entertainment via friendly neighborhood voices — so in theory, it’s the perfect platform in a global crisis that forces hundreds of millions of people to stay home. But Ryder is one of many in the radio community — including on-air hosts, music directors, program directors — who have been shocked by sudden job losses in recent weeks as COVID-19 has spread across the U.S., and news out of the industry has been one bad thing after another. Why is terrestrial radio missing the opportunity here — and how should it be fighting to get back on top?[…]
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’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors Troy Riedel, Dennis Dura, and Dan Robinson for the following tips:
As noted in this obituary published by his hometown newspaper, The Paducah Sun, Ernest Eugene “Gene” Pell, 83, died quietly on April 7, 2020, at his home near Syria, after a 3-year battle with cancer. Pell served as President and Chief Executive Officer of Radio Free Europe/Radio Liberty (RFE/RL) from 1985-1993, leading the Radios during the peaceful revolutions that occurred in Eastern Europe and the Soviet Union from 1989-1992.
In Tribute to Gene Pell
In 1989, we who were privileged to serve in the management of RFE/RL as Gene Pell’s colleagues watched the awesome professionalism of RFE/RL’s broadcasters as peaceful revolution swept from the Baltics to the Balkans, and the Radios helped each country share with others the power – even the slogans – of peaceful protest, and the wisdom of restraint by police and armed forces.
Romania was a tragic exception. Ceaucescu’s regime was doomed by RFE’s broadcast of a recording of the shooting of civilians protesting in Timisoara. As Ceaucescu fled Bucharest, and violence by unknown combatants erupted, Gene ordered a million watts of shortwave power from our transmitter stations across Europe diverted to the Romanian service. Before long, Romanian army commanders seeking to restore calm established phone contact with the service in Munich.
In the immediate aftermath of the liberation of Eastern Europe, and the 1991 collapse of the Soviet Union, Gene saw the need and found the resources to open bureaus across the region and begin on-the-ground reporting by talented local journalists – and local rebroadcasting of RFE/RL programming.
And he persuaded the U.S. government to allow RFE/RL for the first time to broadcast to the former Yugoslavia, during the Bosnian War, with a new, multi-ethnic service led by Nenad Pejic*.
On Gene’s watch, Lennart Meri, Foreign Minister of a newly free Estonia, nominated RFE/RL for the Nobel Peace Prize.
Gene’s leadership was crucial as another struggle soon ensued, this time in Washington, as efforts arose to save the federal government money by shrinking or closing the Radios, on the premise that if Europe was free, why did we need Radio Free Europe (and Liberty)? Support from new democratic leaders across the region, notably from Lech Walesa and Vaclav Havel, helped convince a Presidential Commission addressing this question that the Radios’ mission should not end but evolve, as it has.
The views of these freedom leaders were decisive in keeping RFE/RL on the air and positioned to win the enormous multi-media audience it enjoys today. Gene Pell’s vision is alive for future generations.
Two of my closest colleagues, Ross Johnson and Kevin Klose, join me, as I am sure many others would, in saluting Gene for his contribution to a freer world.
Terrestrial radio may be a dying medium, but there are still plenty of listeners out there. What would a commute to or from work be without a check of “Traffic on the Eights” to see if you need to alter your route, or an update of the scores from yesterday’s games? Getting that signal out to as many listeners as possible takes a lot of power, and this dangerous yet fascinating demo shows just how much power there is on some radio towers.[…]
The Voice of America is the nation’s largest publicly-funded international broadcaster, reaching 280,000,000 multimedia users in 47 languages each week, many of whom access it daily for honest, balanced and accurate world news.
To most senior VOA officials, past and present, including this writer, an unsigned White House blog on April 9, 1600 Daily, omitted or misstated vital information about the scale and original date of the coronavirus outbreak in mainland China. That blog asserts in a bold headline: “Voice of America spends your money to speak for authoritarian regimes.”
But that attack was just the beginning.
President Trump went even further at his daily news briefing on April 15, largely devoted to the coronavirus. “If you heard what’s coming out of the Voice of America, it’s disgusting”. The President then assailed Congress for failing to take up his nomination of conservative Michael Pack as chief executive of all five U.S. funded multimedia organizations, the U.S.Agency for Global Media, until recently known as the U.S. Broadcasting Board of Governors.
The USAGM is the oversight body of five overseas multimedia U.S.-funded networks: VOA, Radio Free Europe/Radio Liberty, Radio Free Asia, the Middle East Broadcasting Network in Arabic, and Radio/TV Marti in Spanish to Cuba. Research in approximately 100 countries indicates that collectively, the five networks reach 350,000,000 people abroad every week.[…]
The Coronavirus outbreak and the RSGB’s introduction of online exams that can be taken at home have led to a surge in demand for free online amateur radio training courses such as that run by Essex Ham
Volunteers from Essex Ham run a completely free online training course for the UK amateur radio Foundation exam.
A record breaking 260 people enrolled on the course that started April 5 with a further 164 waiting to start the next course.
In response to the demand Essex Ham are running an additional course, open to anyone in the UK, starting on April 19.
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 Jack Kratoville, Dave Zantow, and Dennis Dura for the following tips:
iHeartMedia owns and operates 858 broadcast radio stations, serving more than 150 markets throughout the U.S. The company reaches over a quarter billion monthly listeners ?in America.
In January, news hit that iHeartMedia was reassessing its ability to adapt to the modern music industry. The company said that it plans to make “significant investments … in technology and artificial intelligence.”
However, its on-air DJs were caught off guard when they found out that the company’s restructuring plan didn’t include them.
Streaming platforms has ushered in the digital age of music where each person make their own playlists. What does that mean for the future of the on-air DJ in the United States?
Librespace, who are the people behind the open hardware/source SatNOGS satellite ground station project have recently released a comprehensive paper (pdf) that compares multiple software defined radios available on the market in a realistic laboratory based signal environment. The testing was performed by Alexandru Csete (@csete) who is the programmer behind GQRX and Gpredict and Sheila Christiansen (@astro_sheila) who is a Space Systems Engineer at Alexandru’s company AC Satcom. Their goal was to evaluate multiple SDRs for use in SatNOGS ground stations and other satellite receiving applications.
The SDRs tested include the RTL-SDR Blog V3, Airspy Mini, SDRplay RSPduo, LimeSDR Mini, BladeRF 2.0 Micro, Ettus USRP B210 and the PlutoSDR. In their tests they measure the noise figure, dynamic range, RX/TX spectral purity, TX power output and transmitter modulation error ratio of each SDR in various satellite bands from VHF to C-band.
The paper is an excellent read, however the results are summarized below. In terms of noise figure, the SDRplay RSPduo with it’s built in LNA performed the best, with all other SDRs apart from the LimeSDR being similar. The LimeSDR had the worst noise figure by a large margin.[…]
Brief: Shortwave is a modern looking open source Internet Radio player for Linux desktop. We take a quick look at it after its recent stable release.
Shortwave is an interesting open-source radio player that offers a good-looking user interface along with a great experience listening to the Internet stations. It utilizes a community-powered database for the Internet stations it lists.
Shortwave is actually a successor of the popular radio app for Linux, Gradio. Its developer Felix joined GNOME and discontinued Gradio to create Shortwave from scratch in Rust programming language. If you were using Gradio as your preferred Internet radio station player, you can import the library as well.
Recently, Shortwave released its first stable version and seems to push new updates after that as well.[…]
