Monthly Archives: April 2020

John adds a pre-amp and rotatable stand to his homebrew NCPL antenna

A couple weeks ago, we featured John Mills’ homebrew Noise-Cancelling Passive Loop (NCPL) antenna (see photo above) in a post with two other Post community designs.

John recently shared an update to his project:

As promised, some more pictures of my antenna mounted on a rotatable stand. I have used standard (in the UK) 20mm electrical plastic conduit and fittings to make the frame.

Fitted a small plastic box to house the balun and have put a BNC socket on the underside of it for connection the coax cable to my Rx.

I have also been experimenting with cheap low cost amplifiers (LNA) found on eBay (see picture) which do seem to improve the general strength of signals by 10-15db, but the baseline noise also rises.

I did manage to hear a QSO on 160M using one of these which was inaudible without the LNA but I cannot say for sure yet if they are worth the extra noise introduced.

Thank you for sharing your update, John! The plastic conduit support is simple and effective! Indeed, it looks very professional. What I love about your NCPL build (loop, stand, and LNA) is it that it’s all incredibly affordable as well.

Read more about John’s NCPL build in this post.

Post Readers: Has anyone else experimented with implementing a pre-amp in their NCPL antenna design? Please comment!


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Trans-Oceanic spotted in 1959 film “On the Beach”

Many thanks to SWLing Post contributor, Mario Filippi (N2HUN), who writes:

Maybe this is old news but in the 1959 film “On the Beach” which was from the book by Nevil Shute, there is a Zenith transoceanic shortwave radio in this clip from the film. It is inside the lighthouse and appears just about five minutes into the film.

Big stars in this one, Gregory Peck, Ava Gardner, Fred Astaire and Anthony Perkins.

Thanks for the tip, Mario! I love classic films, but I don’t think I’ve seen On the Beach. I’ll put this on my watch list!

I’ll add this post to our ever growing archive of radios in film!

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Got some extra time to read? Subscribe to The Spectrum Monitor!

While most of us across the planet are sheltering at home due to the C-19 pandemic, we have a little extra time to catch up on reading.

I subscribe to (and write features for) a number of radio publications, but the best bargain on the planet must be The Spectrum Monitor Magazine (TSM).

Issues of TSM are a mere $2 each if you purchase an annual subscription ($24). Don’t care for an annual subscription? You can buy issues á la carte–preview an issue on the TSM website then purchase it for $3.

As a writer, I love TSM because 1.) they cover an impressive variety of radio topics and 2.) there is no real word limit on articles. I can take my readers on a truly deep-dive into a review or topic and not have to worry that portions will be cut to meet page margins for print. As long as content is relevant and informative, TSM keeps it.

In addition, TSM is published as a PDF which means it can be read with any computing device–desktops, laptops, tablets, eReaders, and smart phones. There’s no need to load a proprietary publisher app–it’s a truly portable electronic issue. PDFs are also the easiest of all formats to print at home if you want to archive a paper copy of an article or entire issue.

If you haven’t subscribed to TSM before, you may be especially interested in their annual archives. I recently discovered you can purchase an entire year of archived issues for $12…that’s only $1 per issue!

Check out the annual archives in the left sidebar of the TSM website.  When you click on a year, you can browse an index of all topics and features before making your purchase. The $12 price is valid for the 2014-2017 years.

TSM Publisher and Managing Editor, Ken Reitz (KS4ZR), has done a fabulous job collecting a group of writers who are not only experts in their respective fields, but are effective writers as well. These two qualities do not always go hand-in-hand.

At $24 ($2/issue) per year, I think TSM is one of the best radio bargains out there. While you’re sheltering at home, why not explore the full spectrum of radio via TSM?

Click here to visit The Spectrum Monitor.

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Radio Waves: Zombie Sats, Radio Provides Undemanding Friendship, Boom in New Stations, and One Retailer’s Ham Radio Connection

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 BJ Leiderman and Richard Black  for the following tips:


Long-Lost U.S. Military Satellite Found By Amateur Radio Operator (NPR)

There are more than 2,000 active satellites orbiting Earth. At the end of their useful lives, many will simply burn up as they reenter the atmosphere. But some will continue circling as “zombie” satellites — neither alive nor quite dead.

“Most zombie satellites are satellites that are no longer under human control, or have failed to some degree,” says Scott Tilley.

Tilley, an amateur radio operator living in Canada, has a passion for hunting them down.

In 2018, he found a signal from a NASA probe called IMAGE that the space agency had lost track of in 2005. With Tilley’s help, NASA was able to reestablish contact.

But he has tracked down zombies even older than IMAGE.

“The oldest one I’ve seen is Transit 5B-5. And it launched in 1965,” he says, referring to a nuclear-powered U.S. Navy navigation satellite that still circles the Earth in a polar orbit, long forgotten by all but a few amateurs interested in hearing it “sing” as it passes overhead.[]

Ken Bruce: ‘Radio provides friendship in an undemanding way’ (BBC News)

You wouldn’t normally hear a tractor driving past or birds tweeting in the background of Ken Bruce’s BBC Radio 2 show.

But, if you listen closely, those are just a few sounds you might be able to pick up on now the presenter is broadcasting from his Oxfordshire home.

“I do live in dread of the binmen arriving or the Royal Air Force flying over in extremely noisy Chinooks as they do sometimes,” Bruce laughs. “But so far it’s been fine.”

Bruce’s mid-morning show on Radio 2 – which he has hosted continuously since 1992, following an earlier stint in the 1980s – is particularly popular at the moment as more listeners turn to the radio while confined to their homes.

“At a time like this, people want to hear the news, but they don’t want it all day,” Bruce says. “From my point of view, I’ll pay attention to one news broadcast a day, and after that I don’t really want to know too much unless it’s a major development.

“So escapism is a big part of keeping people feeling right during this and I think we provide a certain amount of that, a chance to put the worries of the world to one side.”[]

The coronavirus is bringing about a boom in new radio stations (The Economist)

MILLIONS OF PEOPLE in lockdown are finding diversion at the flick of a dial. According to Radiocentre, the industry body for commercial radio in Britain, local and national stations reported increases in daily listeners of between 15% and 75% in the second half of March. They’ve got competition. Radio stations offering information, entertainment and reassurance to listeners isolated at home have sprung up from Ireland to Syria, Italy to India. Informal and interactive, many are run by amateurs from their homes, with producers learning the ropes as they go.

In Italy Radio Zona Rossa (Radio Red Zone) began broadcasting from the town of Codogno, the site of the country’s first locally transmitted coronavirus infection, just days after Lombardy went into lockdown on February 21st. Hosted by Pino Pagani, an octogenarian whose co-presenter and friend was killed by the virus in March, the twice-daily programme uses the registered FM frequencies of a local station, Radio Codogno, to provide updates on the spread of the virus and the opening hours of local essential services. Mr Pagani also interviews experts and invites residents to call in for a chat. [Note that the full article is behind a paywall …]

Unclaimed Baggage began from a social distance connection, 1970’s style (Unclaimed Baggage)

Doyle Owens loved radios––specifically ham radios. We don’t use them much these days; most of us don’t even know what they are (for the uninitiated: “ham” is slang for “amateur” radio, and its enthusiasts make a hobby of connecting with each other over radio frequencies). In the ‘60s and ‘70s, it was the equivalent of a group FaceTime call, sans face.

Doyle, call sign K4MUR, went to bed early so he could be on the radio by 4:30am to talk to friends in different time zones all around the world. Some were friends from childhood, friends from his days of service in the Korean War. Most of his friends, however, were friends he’d never met in person, who he knew only from the airwaves. Many of them knew him more intimately than the friends and neighbors he saw every day.

Those mornings were his window into the world outside Scottsboro, Alabama, population 9,324 (in 1970), where he’d been working in insurance since shortly after the Korean War. The insurance business paid, but it bored him to tears. Creative energy ran in his blood: during the Great Depression, his father ran a general store on wheels in rural Alabama, which he used to barter for much needed goods. Doyle knew he was destined for more, but he didn’t know what.

One day, a ham radio friend who worked for Trailways Bus Company in Washington, D.C. let Doyle and his friends in on an unusual problem: the bus line had an accumulating pile of unclaimed bags that they didn’t know what to do with. Doyle’s ears perked up. “How much would you sell it for?” he asked his friend. “Well, I’m not sure,” his friend said. They settled on three hundred dollars.

That afternoon, Doyle borrowed his father’s ’65 Chevy pickup truck and stopped at his father-in-law’s house on the way out of town to borrow three hundred dollars. When he returned, he and his wife Mollie Sue set to unpacking the massive load of luggage. They rented a house on the outskirts of town and set up card tables inside to display the contents of the luggage. Outside, a homemade storefront sign read “Unclaimed Baggage”. That Saturday the doors opened for business, and by the end of the day the tables were empty.

The rest isn’t exactly history. It took many more loads of luggage, many more loans, many more long days and short nights before Doyle’s business grew into the worldwide, fifty-year-old retail phenomenon it is today. But it all started with an idea.

No one knows where they come from, ideas. What we do know is that the right environment––the kind populated by dear friends, clear air, long drives down country roads and the like––clears space for them to land.

The current moment, plagued by uncertainty, financial distress and, well, actual plague, could be seen as less conducive than ever to creativity. Ernest Hemingway once wrote that worry destroys the ability to create, and ill health, which produces worry, attacks your subconscious and destroys your reserves. If we all, like Hemingway, had the ability to combat the malaise with all the fishing, sailing and boxing our hearts desire, we might not be in such a tough spot.[]


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Radio Deal: 5 Pack BaoFeng UV-5R HTs $94.99 via Woot

The daily deals site, Woot, is selling a five pack of BaoFeng UV-5R HTs, each with charging cradle, earpiece and programming cable for $94.99 US. Not a bad deal as you can outfit you whole ham family for a mere $19 per radio!

Woot clearance deals like this one last only one day. At time of posting, this deal will only be available for 17 more hours or when supplies run out.

Amazon Prime members get free standard shipping.

The BaoFeng UV-5R is a super cheap radio, but is quite durable and has a massive ham radio user base.

Click here to check out this deal at Woot.

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Encore – Classical Music on Shortwave – New Simulcast

Regular Broadcast times of Encore are: 
10:00 – 11:00 UTC Saturday 6070 kHz Channel 292 to Europe – Now Simulcast on 7440 kHz
Repeated:
01:00 – 02:00 UTC Sunday 5850 kHz, simulcast on 5010 kHz WRMI to the US, Canada and Central America.
08:00 – 09:00 UTC Sunday 7440 kHz Channel 292 to Europe
02:00 – 03:00 UTC Monday 9455 kHz WRMI to the US and Canada
13:00 – 14:00 UTC Tuesday 15770 kHz WRMI to Europe
20:00 – 21:00 UTC Thursday 15770 kHz WRMI to Europe
19:00 – 20:00 UTC Friday 6070 kHz Channel 292 to Europe
Our email is  [email protected]. Informal reception reports as well as those requesting eQSL welcome.
The website is www.tumbril.co.uk where we show transmission times and frequencies, the playlist for the most recent programme, more information about Radio Tumbril, and the email link.
This week the programme is has a bit of a new age feel to it. There is some electronica from Ani Williams – her invocation to Hathor, and Jessita Reyes playing native American flute in her composition Early Morning.
We have some slightly more conventional but very beautiful solo classical guitar from Jim Perkins and a duet for flute and cello by another contemporary composer, Yoel Reza Afhami.
There is also A string quartet by Haydn, a long piece by Dvorák, and two Scriabin piano preludes to balance things out.
The playlist is on the website and will be updated as soon as possible after Saturday’s broadcast of the new show by Channel 292 at 11:00 UTC.
Channel 292 can be pulled live off the internet if the reception is poor in your location. Easy to find their site with a google search.
In the meantime – thank you for spreading the word about Encore – Classical Music on Shortwave on Radio Tumbril. And thank you for letting us know how well the signal is received where you live.
Brice Avery – Encore – Radio Tumbril – Scotland
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You’ve Been Warned: Emilio just brought a Grundig Frankenradio to life–!

Many thanks to SWLing Post contributor (and certified mad scientist), Emilio Ruiz, who writes:

Recently I was given a broken Grundig G8 Traveler II.  This radio had an accident–the case, speaker, tuning knob, and volume controls were all broken or damaged.

I discovered that the tuning and volume controls are not potentiometers, they are a rotary encoders, so I substituted the tiny and broken original controls with rotary encoders (typically used for Arduino projects), but I needed to remove the 10 kiloohms resistor to work properly (only used the CLK, DT, and GND pins).

All materials were reused from other things, the result is like a “Frankenstein radio”.

The “telescopic” antenna is a tape measure/flexometer which was broken too. I replaced the original speaker (which I think was another impedance) with a proper 8 ohms speaker which produced low volume, so i decide add a Pam8403 amplifier module for best performance. The total current drain is 0.10 amp for a regular “loud” audio level.

So the Grundig Frankie is alive!!… It’s alive!!

Click here to view video in new window.

This is brilliant, Emilio! Although this radio is quite scary–and, let’s face it, “post-apocalyptic”–I think it’s absolutely amazing! I love the handle and the tape measure antenna. You, sir, are a mad scientist and I look forward to your next creation! (I’ll just take shelter first!) 🙂

Anyone else ever created a Frankenradio? Please comment!

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