Tag Archives: Nostalgia

Radio Waves: Digital Audio via Vintage Radio, “10-Minute-ish” Transmitter, Why No Channel 37, and Inventor of the Audio Cassette Dies at Age 94

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Image by Jon Tyson

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 Ron, Valdo Karamitrov, Ronald Kenyon, and the Southgate ARC for the following tips:

‘I play digital music through my 1949 radio’ (BBC News)

When we think of technology our imagination usually takes us to images of the future. But for some, technology links us to the past – whether for nostalgia or for personal reasons

Following our recent feature on vintage technology, we asked you to share some of your collections with us – and people from around the world responded..

Rob Seaward, North Yorkshire, UK: 1949 Murphy A146 radio

I have a collection of older technology which I have collected throughout my life – including old cameras, calculators, hi-fis and radios. I had been interested in music from an early age, but it was really when my father purchased a Bang and Olufsen music centre that my interest in not only music, but style and function really took off.

To me, a lower middle-class grammar school kid living in Bradford, I suddenly had access to a world of real style and glamour.

My favourite piece must be the Murphy A146 console radio designed by Gordon Russell in 1949.

Its nickname is the “Batwing” because of the shape of the back panel. The sound is rich, slightly warm and typical of valve equipment. In its day, the radio cost the equivalent of an average monthly wage, it was built to last and the original valves are still working today.

However, as it pre-dates FM it is a little limited. I’ve had it restored and as part of the process we had a Bluetooth adapter installed which means I can now play my favourite digital music through this wonder from the 1940s – which really amazes people.[…]

Getting on the Air With a 10-minute-ish Ham Transmitter (Hackaday)

Artificially constrained designs can be among the most challenging projects to build, and the most interesting to consider. The amateur radio world is no stranger to this, with homebrew radio designs that set some sort of line in the sand. Such designs usually end up being delightfully minimalist and deeply instructive of first principles, which is one reason we like them so much.

For a perfect example of this design philosophy, take a look at [VK3YE]’s twist on the classic “10-Minute Transmitter”. (Video, embedded below.)

The design dates back to at least the 1980s, when [G4RAW] laid down the challenge to whip up a working transmitter from junk bin parts and make a contact within 15 minutes — ten for the build and five for working the bands. [VK3YE] used the “oner” — one-transistor — design for his 10-minute transmitter, but invested some additional time into adding a low-pass filter to keep his signal clean, and a power amplifier to boost the output a bit.[…]

Why Channel 37 Doesn’t Exist (And What It Has to Do With Aliens) (Vice)

Since the advent of analog TVs, channel 37 has always been static. Here’s why.

A version of this post originally appeared on Tedium, a twice-weekly newsletter that hunts for the end of the long tail.

I’m endlessly fascinated by stories of the quirks that were built into the TV system where the well-laid plans of the system simply fell apart because it was asked to do too many things.

Nearly five years ago, I wrote about one of them, the tale of how radio broadcasters were able to shoehorn an additional FM station into the radio because of the proximity of TV’s channel 6 to the rest of the radio feed.

So when I was informed that there was another oddity kinda like this involving the TV lineups, I decided I had to take a dive in.

It’s a tale that centers around channel 37, which was a giant block of static in most parts of the world during the 20th century.

The reason for that was simple: it couldn’t fend off its scientific competition.

1952

The year that the U.S. Federal Communications Commission opened up the television system to use UHF, or ultra high frequency signals. The practical effect of this addition of bandwidth was that the total number of potential TV stations increased dramatically, from 108 to 2,051, overnight. The first UHF applications were granted on July 11, 1952, according to The History of UHF Television, a site dedicated to the higher-frequency television offerings.

The radio telescope that became a headache for the television industry

Within a 600-mile radius of the city of Danville, Illinois, population 31,246, are numerous major cities—among them Chicago, Detroit, Milwaukee, Atlanta, Minneapolis, Pittsburgh, St. Louis, Toronto, and Washington, DC.

Nearly the entire length of the Mississippi River fits into that radius. If Danville was located just a little farther to the east, the radius would also include Philadelphia and New York City. For all intents and purposes, a 600-mile radius from Eastern Illinois covers basically the entire East Coast except the state of Florida and the Northeast.[…]

Dutch inventor of the audio cassette tape dies aged 94 (Southgate ARC)

Lou Ottens, inventor of the cassette tape and a CD pioneer died aged 94 at his home in Duizel in Brabant on Saturday, Dutch media report.

Ottens, who studied to be an engineer, started working for Philips in 1952. Eight years later he became head of the firm’s recently introduced product development department. Within a year he and his team had developed the first portable tape recorder of which over a million were sold. Two years later he revolutionised the old reel-to-reel tape system by inventing the cassette tape.

‘I got annoyed with the clunky, user-unfriendly reel to reel system, it’s that simple’, Ottens said later. The new carrier had to be small enough to fit into his jacket pocket, Ottens decided, and he had a wooden model made to determine the ideal size. In 1963 the first plastic encased cassette tape was presented at an electronics fair carrying the slogan ‘smaller than a pack of cigarettes!’ The tapes were quickly copied by the Japanese but in different formats!

Ottens managed to make a deal with Sony to use the mechanism patented by Philips to introduce a standard cassette which was then rolled out globally. Over 100 billion were sold worldwide. Ottens went on to develop the CD, which again became a Sony-Philips standard and which sold over 200 billion.

In 1986 Ottens retired but he was often asked if he was proud of his inventions, which allowed millions to have access to music. ‘I have no ‘pride dial’’ Ottens said in an interview, stressing that both inventions were team efforts. His biggest regret was that that Sony, not Philips, invented what he considered to be the ideal application for the cassette tape, the Walkman. ‘That still hurts,’ he said. Dubious about the recent revival of the cassette tape Ottens said ‘nothing could beat the sound of a CD.’

Read more at DutchNews.nl
https://www.dutchnews.nl/news/2021/03/dutch-inventor-of-the-audio-cassette-tape-dies-aged-94/?

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The Halcyon Days of CB Radio

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This morning, I read a message from a ham radio operator who was just awarded a vanity call sign in honor of his father’s 1970s era CB radio call sign. He was obviously very proud of the role CB played in his “formative” radio years.

Although I often only think of the impact my first transistor radio and first shortwave radio had on my life, CB radio also played a major role.

My father entered the CB radio scene in its early days here in the US. His FCC-issued call sign was KJD1166–it’s laser-etched in my memory from hearing him call it so many times when I was a kid.

Dad had a number of radios, but his favorite was a yellow Robyn T-240D (above). As a kid, I really admired this radio; not only was it stylish, but it also had a digital channel display, amazing audio, and that “Range Expand” toggle switch!

In the 1970s, the CB radio scene in my hometown was dynamic and rather well-organized. Every evening, my dad would turn on the radio and connect with a vast network of radio friends. Not only did they have call signs–and used them–but they also had the best CB handles (like “Tombstone Pete,” “Lady J,” and “Robby Rocket”).

The local CB radio scene also had in-person social meet-ups–a place where you could put a call sign and handle to a face. And let me tell you: you’d see a wide array of folks from all walks of life there. A proper melting pot.

Dad also took me to the CB radio repair shop where he’d buy supplies and occasionally get something fixed. I loved looking at the workbench full of half-disassembled radios. At one point in my childhood, all I really wanted to do was have a workbench like that and dig into radios. Even at a young age, I knew how to use a screwdriver and could void pretty much any warranty.

After the FCC did away with call signs, much of the local CB community fell apart. My dad would still check-in with friends on the air the years following, but much less frequently.

CB: A Ham Radio Gateway Drug

No doubt about it: CB radio eventually lead me down the path to ham radio.

While I never participated in the 70s CB radio scene like my dad, my best friend and I used CBs to communicate with each other across the neighborhood in the 1980s.

My buddy grew up in a multi-generation household and telephone time was restricted to grown-up use (and his teenage sister).

CB radio bridged that communication gap for us. At one point, we both used Realistic 5 Watt 40 channel walkie-talkies–it was incredibly fun and effective.

CB radio, and my dad, taught me about the components of a radio transmitting system–the radio, coaxial feed line, antenna and grounding, etc.–and also concepts like power output, standing-wave ration (SWR), and skip.

I still own my 40 channel CB walkie-talkie (a Realistic TRC-217) and my dad still has his Robyn T-240D, although neither have been on the air for decades. Still, I feel very nostalgic about the 1970s radio scene and should certainly give it credit for paving the path to my ham radio ticket.

Did CB radio play a role in your life? Please comment!

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Video: 1954 Inauguration of REE/RNE Shortwave Radio Transmitters

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Many thanks to SWLing Post contributor, Ulis Fleming (K3LU), who shares the following video via Twitter and notes:

Spain: Must see newsreel video of the 1954 inauguration of REE/RNE shortwave radio transmitters:

Click here to watch video at the RTVE archives.

Many thanks for sharing this excellent bit of radio history, Ulis. I was just telling a friend that Radio Exterior de España still has one of the biggest signals out of Europe into North America these days on 9690 kHz.

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Radios that may not be benchmark, but are pure fun–!

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Many thanks to SWLing Post contributor, John R Palmer, who replied to our previous post about radio regrets with a question.

John asks:

Name a piece of radio gear that for some reason, technical, emotional, design etc. that you’ve gotten more fun using than you would ever have expected based on its price, maybe more so than other much more expensive radios you’ve owned. Just a piece of gear that really hit the spot and you’ve had a blast using.

That’s a tough question indeed, John. I hope readers will chime in with their replies–I’m very curious!

So I gave this quite a bit of thought and came up with two radios–one shortwave portable and one general coverage ham radio transceiver:

The Radio Shack DX-351

In 1996, I worked for a Radio Shack corporate store in Athens, Ohio. I believe we were getting ready for the Black Friday/Christmas season and the store manager decided to go through a pile of broken items customers has returned using their extended warranty. He had accumulated quite a number of returns in a box next to his desk in the back of the store. I stayed after hours to help him organize the shelves and prepare for incoming shipments.

Most of the items in his box were physically broken, but still covered by the extended warranty (to their credit, many RS store managers were quite flexible with extended warranty returns). He pulled out a Radio Shack DX-351 from the box.

The customer returned this portable because the AM/FM/SW slider switch was broken. My manager knew I was an SWL, so asked if I wanted it. He said, “If you don’t, it goes into the trash can because we can’t re-sell it.”

How could I resist?

This DX-351 was “well-loved.” I can’t remember all of the details, but the AM/FM/SW band switch could not be fixed, but I didn’t mind because the receiver was stuck on the shortwave band and the other shortwave band switch worked perfectly.

The DX-351 was a joy to use and amazingly sensitive! It wasn’t particularly selective, but it served me well for many years living, primarily, in the glove compartment of my car. If I took a road trip, a lunch break at the park, or if I was simply waiting in a parking lot to pick up my wife, I’d pull out the DX-351 and tune in the world.

The thing was pure fun to tune.

The Icom IC-735

In the world of general coverage ham radio transceivers, the Icom IC-735 would be my choice.

The IC-735 was my first ham radio transceiver. I used my hard-earned savings (from working at Radio Shack!) to buy a used unit via the now closed Burghardt Amateur Radio Center in South Dakota. My friends, Eric (WD8RIF) and Mike (K8RAT), believed a used IC-735 would serve me well. They were right!

What I really loved about the IC-735 was that it had all of the features and modes I needed. It was easy to operate and, while I couldn’t call its receiver “benchmark” by any means, it was amazingly sensitive and selective.

I logged hundreds of hours on this radio in both SSB and CW, working DX across the globe.

But I spent even more time SWLing. Turns out, the IC-735’s general coverage receiver did justice to shortwave broadcasts. The AM filter was wide enough to produce wonderful audio (especially via an external speaker or headphones). For years, the IC-735 was my go-to shortwave radio because it performed so much better than any other radios–mostly portables–I had at the time.

The IC-735 was so much fun to use.

I did eventually sell it, if memory serves, to purchase my first Elecraft K2 transceiver.

What are your choices?

So what are the radios you’ve owned that may not sport the best performance, and may not have been terribly expensive, but were pure fun to put on the air–? Perhaps you still own one? Please comment!

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Have you ever regretted saying goodbye to a radio?

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A lot of radios come through SWLing Post HQ each year.

Over the years, I’d like to think that I’ve become immune to the effects of giving away, trading, or selling radios that have been in the shack for a while. But let’s face it: I’m just fooling myself!

I sold both my Hammarlund SP-600 and Hallicrafters SX-99 at the Shelby Hamfest.

As I’ve said before, I find it much easier to part with modern portables, transceivers, and SDRs than I do with vintage gear.  With modern gear, I feel like there’s always something new around the corner, thus it’s easy to justify. Plus, I take in so many units on loan for evaluation and review, I see them come in the door and go back out. Occasionally, I like one so much I buy it, but there’s not a lot of attachment. I’m not a “fan boy” of any modern company either, so I don’t intentionally collect rigs.

Ah, but the vints…

I’m a nostalgic guy, so vintage gear comes with more emotional attachment.

Over the years, I’ve had to part with a number of boat anchors because, frankly, I always need a clear space in the shack for evaluating gear and my shack is rather compact. (For example, at one point last year, I had three transceivers here for evaluation all at the same time.)

My Hammarlund SP-600was a very tough one to let go of. I justified it by selling the big girl to my good friend Charlie (W4MEC) who had actually helped me replace some of her capacitors at one point. The SP-600 was simply too deep and too large to fit even on my over-sized radio shelves–especially if mounted in a chassis. Charlie has a much better setup for rack-mounted “heavy metal.” She’s got a good home now.

The Scott Marine Radio Model SLRM

There are two vintage sets I’ll never sell: my Signal Corps BC-348-Q and my Scott Marine SLRM (photo above). How much do I love these radios? My wife has strict instructions to “put’em in the casket with me!”

There are only two portable radios I regret selling: my original RadioShack DX-440 and my Grundig YB400.

I did snag this DX-440 last year at the Huntsville Hamfest

No doubt, I miss these radios because they both served me for so many years. We traveled many countries together both on the ground and through the airwaves.

Parting is such sweet sorrow…

A number of readers have confessed that they regretted selling their RF-2200.

Have you ever regretted parting with a radio? Please comment with the model and why it was special to you. I’d also love to hear about the models you currently own and would never consider selling or giving away.

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DUST “Voskhod”: A Sci-Fi short that features ham radio

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Many thanks to SWLing Post contributor, Scott Gamble, who shares the following science fiction short film called “Voskhod” by DUST.

The synopsis:

After repairing his HAM radio using parts found in the forest, a recluse radio operator receives a distress call from a stranded Soviet cosmonaut in orbit.

I thoroughly enjoyed this short film. We radio enthusiasts will certainly notice some inaccuracies on the radio side of things–feel free to comment on those–but I suggest you exercise a willing suspension of disbelief and truly enjoy this piece!

Click here to view on YouTube.

Can you identify the National radio model? Please comment!

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Adam’s Andes DXers International certificate

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Many thanks to SWLing Post contributor, Adam Smith, who shares the following certificate and writes:

I was going to share a piece of history I just came across going through some of my shortwave radio boxes. Lots of QSLs but this its a membership in ANDES DX Club!

Good times!

Thank you for sharing this bit of shortwave radio nostalgia, Adam! Any others in the SWLing Post community belong to the Andes DXers International? Do you still have your certificate? Please comment!

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