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Many thanks to SWLing Post contributor, Bob Colegrove, who recently shared this excellent article and has kindly allowed me to share it here in the the Post. Bob prefaced it by saying, “Being a retired technical writer, I started the attached article some time ago for my own amusement, but it quickly got out of hand.”
“Got out of hand” in a very good way, Bob!
An excerpt from Bob’s article.
I love how this piece takes us through receiver history and explains, in detail, the mechanics and innovations. It’s also a very accessible piece that both the beginner and seasoned radio enthusiast can appreciate.
But don’t take my word for it, download it and enjoy!
Thank you again, Bob. This is a most enjoyable and informative read! This was obviously a labor of love. Thanks for sharing it with our radio community!
Many thanks to SWLing Post contributor, Dave (N9EWO), who writes:
A current YouTube Video I accidentally came across. Ever wonder about those digital displays used in the Apollo space missions ? What were they ? Actually it’s quite a story how these Raytheon displays were developed. One has to remember we are talking about the mid 1960’s here and before the days of LED’s. Reminds me of the electro luminance nightlights still sold today.
Many thanks for sharing this, Dave. Being a massive fan of all things Apollo era, I love the deep dive into this crucial, yet very basic computer. The screen looks (and sounds!) amazing.
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 Paul, David Goren, Pete Polanyk, Ulis Fleming, Troy Riedel, Tracy Wood, Dan Robinson, and Kris Partridge for the following tips:
This episode was written and produced by Olivia Rosenman.
Since World War I, countries around the world have been broadcasting mysterious numerical messages via shortwave radio. Though concrete evidence is hard to come by, the general consensus is that these coded messages are meant for undercover agents operating abroad. And one particular Russian station may have an even more sinister purpose. Featuring computer engineer Andrus Aaslaid, historian Maris Goldmanis, and documentary photographer Lewis Bush.
A public SDR network triangulates the island as the source of mystery signals
By Stephen Cass
As anti-government protests spilled onto the streets in Cuba on July 11, something strange was happening on the airwaves. Amateur radio operators in the United States found that suddenly parts of the popular 40-meter band were being swamped with grating signals. Florida operators reported the signals were loudest there, enough to make communication with hams in Cuba impossible. Other operators in South America, Africa, and Europe also reported hearing the signal, and triangulation software that anyone with a web browser can try placed the source of the signals as emanating from Cuba.
Cuba has a long history of interfering with broadcast signals, with several commercial radio stations in Florida allowed to operate at higher than normal power levels to combat jamming. But these new mystery signals appeared to be intentionally targeting amateur radio transmissions. A few hours after the protest broke out on the 11th, ham Alex Valladares (W7HU) says he was speaking with a Cuban operator on 7.130 megahertz in the 40-meter band, when their conversation was suddenly overwhelmed with interference. “We moved to 7170, and they jam the frequency there,” he says. Valladares gave up for the night, but the following morning, he says, “I realize that they didn’t turn off those jammers. [Then] we went to [7]140 the next day and they put jamming in there.”[…]
Houlton School, where Rugby Radio Station once stood, is set take its first influx of pupils in September
Plans for a new school at the historic former home of Rugby Radio Station are being fine-tuned and remain on track for a September start.
Houlton School, which will be named after the town in America that received the first transatlantic voice broadcast from Rugby Radio Station in 1927, will take its first influx of 180 Year 7 pupils this autumn.
The school, which forms part of the 6,200-home urban extension in Houlton, east of Rugby town centre, will take a new year group of 180 pupils every 12 months.
Michael McCulley, the school’s Principal Designate, said: “Whilst building a fantastic £39m new school during three lockdowns has had its challenges, we are also acutely aware that we have had a completely blank page from which to develop our exciting curriculum and pastoral programme.
“This freedom has been important as we have needed to evolve to the changing needs of our first group of students.[…]
Ham Radio Outlet to open store in Florida (Amateur Radio Newsline)
Ham Radio Outlet, the nationwide amateur radio retailer in the US, has announced that its ongoing expansion plans will include a store in the state of Florida. The new store will join 12 already open in such states as California in the West, where the company is based, to Delaware in the East, Arizona and Texas in the South, New Hampshire in the North. The company’s announcement on social media set off a wave of speculation about the new location, especially on Instagram where the company wrote, “We’re not telling yet! We’re open to suggestions.” The closest Ham Radio Outlet to Florida is in Atlanta, Georgia. The company, which calls itself the world’s largest supplier of amateur radio equipment, is also known for shipping internationally.
Every Sunday, an operator with Pune Police’s wireless wing sends a Morse Code message to the office of the Director General of Police, Maharashtra.
IN THE era of satellite communication, which involves transmitting signals into space and back, and internet based systems transferring gigabytes of data in a flash, police have kept alive the age-old system of Morse Code – a primitive method of sending messages in the form of dots and dashes.
Every Sunday, an operator with Pune Police’s wireless wing sends a Morse Code message to the office of the Director General of Police, Maharashtra. While this is their way of paying tributes to one of the earliest modes of telecommunication, it is primarily a way of maintaining a robust stand-by mode of message delivery in case all other means of communication fail.
Pune City police have recently started a series of tweets featuring the communication systems used by the police and their evolution till date. On Sunday, Pune Police Commissioner Amitabh Gupta tweeted, “As an ode to the beginning of wireless communications, the Commissioner’s Office still uses Morse Code to transmit Messages every Sunday.”[…]
ANTIQUES ROADSHOW saw a World War II spy radio which was disguised as a toolbox fetch a huge valuation when it travelled to Kenilworth Castle.
Antiques Roadshow’s expert Mark Smith marvelled at the ingenuity of a spy radio which was used in World War Two in a recent episode. The item, from the outside, was made to look like a toolbox but when opened, displayed a detailed radio which could be “powered by any source”. So how much was it worth? Mark put a £10,000 to £15,000 price tag on it.[…]
Former WNYC director Seymour N. Siegel suggested that WNYC once received fan mail from Einstein. As I continue to look far and wide for evidence of this alleged bit of praise, I can’t help but wonder, what broadcast prompted the great man to write? Alas, so far, the document has eluded me. But, we do know that the father of the theory of relativity was a subscriber to both the WNYC and WQXR program guides. And we have no less than Erwin Panofsky, the noted German-American art historian and friend of Einstein’s, to thank for that.
It all began when the distinguished gang at the Institute for Advanced Study in Princeton, New Jersey decided to chip in and build the Nobel laureate a “high-fidelity” radio for his 70th birthday. The 1949 gift included subscriptions to the WNYC, WQXR, and WABF program guides.[…]
Many thanks to SWLing Post contributor, Santiago Roland (CX1DR), who writes:
Hi Thomas, I’m a reader of your blog since 2015 and i was looking for movies showing shortwave radio models. I ended up in your blog again, lol, and decided to write to you and tell you that your blog is awesome. I read it many times and gathered lots of information about different topics.
The other day I was watching the last chapter of the Netflix Series Queen’s Gambit and I spotted an old classic, the Soviet VEF 206 shortwave radio. It gets a full frame cameo and it is beautiful.
The radio appears in the scene because (no spoilers) the American girl is playing chess with the world champion in the USSR and the people outside is listening the match with this radio. I send you the caption so you may add it to your collection of radios in cinema.
Oh wow! Thank you for sharing this, Santiago! That screen shot is beautiful–the Soviet VEF 206 has some serious nostalgic appeal!
We’ll add this to our ever-growing archive of radios in movies. Thank you!
Many thanks to SWLing Post contributor, Jon, who writes:
Good day,
I regularly visit the SWLing Post and very much appreciate the breadth of content you provide on the shortwave hobby. In between the receiver reviews and stories on broadcaster activities, I much enjoy the pieces showing the radio gear that folks notice in television/films. Over the course of the COVID19 pandemic, I have been watching a lot of films from Japan, and in the process have spotted quite a few interesting receivers here and there. Below are some photos and details on some of these unsung stars of Japanese cinema. I think that JRC enthusiast Dan Robinson will agree with me that it’s the ensemble cast of JRCs in Virus that steal the show! 🙂
1. Masahiro Shinoda’s 1961 Epitaph to My Love opened with a very nice shot of a Sony TR-812 multi-band portable in a scene where a news broadcast is being heard in a bar setting.
3. Kihachi Okamoto’s 1978 sci-fi film Blue Christmas featured a brief shot of a Sony ICF-7600 – the first of a legendary line of Sony portables that would carry “7600” in their designation.
4. There were several radio appearances in Kinji Fukasaku’s 1980 Virus – a film that took disaster movies to a new level by depicting both a global pandemic and a nuclear holocaust.
A range of JRC gear was captured in a scene that was set in a Japanese Antarctic base. Identifiable rigs include the NRD-10 and the NRD-71.
5. Lastly, we have an unidentified tube receiver from Masahiro Shinoda’s Childhood Days – an interesting 1990 film about a school aged boy in World War II era Japan who, because of the bombing threat, is sent from his Tokyo home to live in a rural village.
Today is Sunday July 4, 2021. Besides being Independence Day here in the States, it’s also Alexanderson Day in Sweden!
This morning, I discovered a video on the Grimeton Station YouTube channel: a recording of their live stream live stream starting around 08:30 UTC today.
In the video, you can watch the crew of the Grimeton station startup, tune, and transmit on their 1924 Alexanderson Alternator with the callsign SAQ. Their message is sent in CW on 17.2 kHz. The video is absolutely fascinating and I highly recommend watching it. The startup and tuning procedure are simply amazing. I can only imagine the dedication and resources it takes to keep this marvel of 1920s engineering fully functional today:
Many thanks to SWLing Post contributor, Dan Robinson, for the following guest post:
Vintage JRC Receivers in Japan Set Price Records
by Dan Robinson
While used market prices for older vintage communications receivers have been dropping significantly in recent years, prices for some classic “premium” receivers — particularly rare marine radios made by Japan Radio Company — have remained in the stratosphere.
The past year has seen a number of examples of this observable on the Japan Yahoo auction site Buyee, and in May and June of 2021 two JRC sets sold for more than $5,000 dollars each after intense bidding.
Both of these involved what appeared from photos to be mostly pristine NRD-240 receivers which came complete with original manuals and cables.
Photos
With Serial Numbers of 66149 and 50337, manufactured in 1996 and 1997, these receivers are examples of what I call “time capsules.” Their condition indicates that they were both in the hands of collectors in Japan, and probably were not in regular extended service as shipboard receivers.
The first sold for $5,776.06 after 164 bids on the Buyee site, while the second went for $5,166.72 after 77 bids.
As described here in an old Universal Radio ad, the JRC NRD-240 was built for marine operations and complied with GMDSS requirements. With coverage from 90.000 to 29999.999 kHz it has 1 Hz display in LSB, USB, AM, CW, and FSK (RTTY) modes. Like many JRC marine receivers it had a front panel selectable 2182 kHz emergency channel. Bandwidths include: 6, 3, 1 and 0.3 kHz with 100 channels, scan/sweep, along with a switchable AF Filter, NB, Lock, Keypad entry, built in speaker, Squelch, BITE, Dimmer and AGC selection.
In the lineup of the most sought after JRC marine receivers, the NRD-240 is listed in the famous guide book by Fred Osterman “Shortwave Receivers Past & Present” on Page 222, as well as on the cover of the book. The price tag is $8000. The receiver was also the subject of a review by in the former Passport to World Band Radio in 1991.
Historically, the NRD-240 was replaced by the JRC NRD-301A, which itself was later replaced by the super-rare NRD-302A, and still later the NRD-630. In terms of rarity, at this point based on my following of the premium receiver used market, the most rare of the JRC marine sets are the NRD-95, followed by the NRD-630 and 301 series.
When bidding gets furious for radios like this, it can take one’s breath away and that was certainly the case with these two NRD-240s. How many more like these, in this condition, may remain in the hands of collectors is, of course, not known.
The rarity of certain receivers can be measured also by the number of user videos showing up on You Tube. There are many of the NRD-92/93 receivers, even some of the NRD-630, and a few showing much older JRC sets such as the NRD-73. I have yet to find a video showing a NRD-240 in operation.
The Japan Buyee site (which sometimes also has receivers that are not physically located in Japan) has a seemingly constant flow of these amazing vintage JRC sets, along with other premium rigs. Photos of the two NRD-240s that sold in May and June are posted with this article (above).
Many thanks to SWLing Post contributor, Bob Colegrove, who recently shared this excellent article and has kindly allowed me to share it here in the the Post. Bob prefaced it by saying, “Being a retired technical writer, I started the attached article some time ago for my own amusement, but it quickly got out of hand.”
