Category Archives: Radios

Give Your Radios a Vacation!

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In 2013, I wrote the following feature for the Monitoring Times Magazine.

Looking back, I realize that I never posted this article on the SWLing Post.

Since we’re in the midst of the summer travel season here in the northern hemisphere, I thought I’d post this feature from five years ago.

I’m also adding a number of photos I took at the Radio Canada International Sackville, New Brunswick, transmitting site–one of my stops on this trip. I only recently rediscovered these (400+) photos in my archive and I’ve yet to curate them and post a proper photo tour. Look for that in the coming months.

After you read this article, I’d love to hear where you plan to travel this year in the comments section of this post! Enjoy:

Phare De La Pointe À La Renommée (Marconi Station, Museum and Lighthouse, Quebec, Canada.

A Radio Vacation: escaping RFI in an off-grid vacation cabin

If you’re like me, a vacation–or, for that matter, any kind of travel–is an excellent reason to pack up your radio gear.  I nearly always travel with a shortwave radio, and typically with some portable recording equipment. If space allows, I also pack a small QRP transceiver–specifically, my Elecraft KX1–even if I know my opportunities to get on the air may be limited. But on an extended family vacation?  Well, that affords some excellent hamcation possibilities!

Last year [2012], our family had a golden opportunity: to spend an entire month in an off-grid cabin on the eastern coast of Prince Edward Island, Canada, some 2,500 miles from our home in the US.

Permit me to paint a picture of this little spot of paradise: the rustic cabin is nestled on a 22-acre site on a beautiful eastern bay. From the cabin’s large front windows facing the bay, there is a long-range view of Panmure Island and, further still, of the Georgetown marina.

The view from our off-grid cabin on Prince Edward Island.

As the site is wooded to the rear of the cabin, the environ feels very isolated from the rest of the world; no other homes or outbuildings are visible. And although off-grid, this little cabin sports simple versions of all of the comforts of home: propane gas meant that we always had hot water, a working refrigerator/freezer, and light after sunset in the form of two wall-mounted gas lanterns. Meanwhile, running water was provided by a unique “on demand” petroleum-powered pump.

 

While to some readers, this may not sound like paradise, this charming cabin gave our family a front-row view of nature’s varied character, from the shimmering sunsets over PEI’s famed terra cotta sands or the last stormy lashes of Hurricane Debbie, to the front-yard wildlife in the form of woodpeckers, owls, gulls, egrets, foxes, mink, and even “Black-Eyed Susan,” our resident raccoon. “Off-grid,” meanwhile, afforded all of us a refreshing break from those electronic devices we often become so –with the exception of radios, of course!

On the return route, we planned to take a driving tour of the Gaspe region of Quebec, via the New Brunswick Acadian coastline. Having made the decision to spend four weeks in the little cabin, I instantly started preparing my radio equipment.

Preparations

As you can imagine, an isolated off-grid cabin poses some serious power-supply challenges for a radio hobbyist, but the benefit is a completely RFI-free zone. In truth, not only was I ready for the challenge, I was enthusiastic about it!

It’s worth noting that on most days of the week, I wear two hats: that of radio hobbyist and that of radio-based humanitarian organization director, Ears To Our World (ETOW).  At ETOW, we work in classrooms located in very remote, rural and impoverished parts of the world, delivering appropriate support technologies, such as radios, to those who need them most. While in the isolated setting, I charged myself with the task of testing some of our solar and self-powered technologies–specifically, a portable power pack made by GoalZero called the Escape 150, and several portable panels and chargers made by the US manufacturer, PowerFilm Solar.

Living in an off-grid cabin for a month would give me the necessary time to evaluate the charge/discharge times and simulate the “real life” usage these items would experience in the developing world. Fortunately as a radio hobbyist, I had the means to put that powerpack to the test! My two radio-inspired passions combined harmoniously in this venture.

All told, all the radio equipment and power supplies I packed consumed no more space in our van than two standard suitcases. Even after packing, we found we had room to spare–the children in their carseats had plenty of room to swing their feet.  So, we set our compass on due north, and set out!

Two nights in Sackville, New Brunswick

En route to Prince Edward Island, it’s hard to miss the (now) former Radio Canada International transmission site in Sackville, New Brunswick. The massive site, with its array of curtain antennas and large sign, is a fixture on the Trans-Canada Highway. Only a few months earlier, I had learned that RCI had been dealt devastating cuts by the CBC and that Sackville’s days were numbered; as a result, I felt I had to make a pilgrimage to the site before it was dismantled.

I arranged to tour the site, and was warmly greeted in Sackville.  Though the staff were dealing with the oppressive news of the pending cuts, were bravely doing their professional best to carry out their duties as usual. The site was immaculate, the transmitters humming. On my tour, I took as many photos as my digital camera would hold, and soon I found myself taking up the cause, mentally working out an action plan to save it from total dismantlement. For many years, this site has been a landmark near the New Brunswick/Nova Scotia provincial line, and I hope in some capacity it will remain there, even for history’s sake. This relatively remote part of Canada has broadcast memorable events and news to every corner of our globe.  It seemed a shame to undo the work of so many previous years. And indeed, the petition I authored this fall has garnered over 600 signatures, so it is clear there are many that feel the same. The decision is now in the hands of politicians.

Photos of RCI Sackville

Many, many thanks to my amazing tour guide, Marcel Cantin, who gave me unfettered access to the RCI Sackville site. Merci bien, Marcel!

Arriving at the cabin

After leaving Sackville for Nova Scotia, we took the Wood Islands ferry across the Northumberland Strait and arrived at our cabin well before dinner time. The morning after arriving at our little off-grid cabin, I sprayed myself down with a little insect repellent and spent an hour installing an inverted vee. I’ve found that, instead of pre-building an antenna, it’s easier for me to conduct a site assessment and simply put the pieces together in a configuration that makes sense. That’s the great thing about temporary QRP antennas: no soldering required. I simply fed my antenna with ladder line, used a PVC “T” joint as a center insulator and large plastic buttons for the insulators at the end of the legs of my antenna.  I held the whole thing together with wire nuts and black electrical tape. Yet because it was electrically sound and balanced, it worked like a charm. Indeed, I didn’t even worry about the length of the radiating elements since I had my Elecraft T1 auto antenna tuner on hand.

That Sunday morning, I set up my entire ham radio and shortwave listening station all before my family was ready to venture out for the day. That afternoon, I worked stations in the US, Canada, and many of the islands in the Caribbean. I was delighted, to say the least.

Off-grid ham fun

My Elecraft K2 and Elecraft T1 combination was working beautifully on all bands down to 80 meters.  I found that, even with heavy use, the K2 required very little of my 30 aH battery. Each day, I charged the battery with two of my foldable 5 watt PowerFilm Solar panels fed in parallel (equating to 10 watts).   I never ran out of power for the K2 and had enough surplus to easily power some 12V LED lanterns, as well.

I was most impressed with the performance of my solar-powered Elecraft K2–no doubt, the very close proximity of salt water (perhaps 200 feet from the antenna) and the height of my inverted vee both helped. Though I worked some CW, I made more SSB contacts than I typically make while portable. I even found that I punched through a couple of pile-ups. Some kind operators also noted me on DX watch lists, and I found myself on the other end of mini pile-ups. Most encouraging were the numbers of other QRP stations I worked, even on SSB. In short, I was having a great time…!

SWLing

I brought four receivers with me on this trip, the plan being to compare their reception: a Winradio Excalibur, Bonito RadioJet, Sony ICF-7600GR, and a Tecsun PL-380. Shortwave radio listening in this coastal spot was nothing short of amazing. In my band-scanning, I heard many of the international stations audible from my southern-US home, like Voice of Greece, All India Radio, Radio France International, the BBC World Service, and Radio Australia.

Listening to the final broadcast of Radio Netherlands on Prince Edward Island.

Though I planned to do some serious 2 MHz spectrum captures on my WinRadio Excalibur, I had not taken one thing into account: the amount of noise that the built-in modified sine wave inverter on the GoalZero Escape 150 generated.  It overwhelmed the Excalibur and rendered listening useless. I could have easily remedied this, had I realized that the input on the WinRadio receiver required a steady 12VDC–I could have used an appropriate battery and never bothered with the inverter. The RadioJet, meanwhile, performed quite well, though my laptop’s battery had a hard time supporting itself and the receiver for more than an hour without the need of a total recharge. While the GoalZero Escape 150 power pack performed very well with DC usage, the inverter could drain a full charge in less than two hours of use.

Any given morning during that vacation, you would find me lounging in front of the cabin’s large glass windows–often watching the sunrise–and listening to CKZN in St. John’s, Newfoundland, on 6,160 kHz–a CBC Radio One shortwave relay in Newfoundland. Though I can hear CKZN back home when conditions are just right, it’s faint.  On PEI, however, it was armchair listening as I sipped my morning java.

Sadly, I lost two shortwave broadcast companions on that trip to PEI: Radio Canada International, and Radio Netherlands Worldwide, each of whom played their final broadcasts.  In both cases, I listened. Most notable were RNW’s final hours, as they actually broadcast tributes throughout the day, targeted at North America. I actually made several recordings from our cabin, and have posted them online: https://swling.com/blog/2012/07/radio-netherlands-says-farewell-in-style/

Marconi stations

Top of the Cape Bear Lighthouse

What’s more, I even got to relive a little radio history in our travels. On PEI we visited the Marconi Station at the Cape Bear Lighthouse. According to lighthouse staff, this little station was one of the first (they will claim, the first) to receive the distress call from the Titanic.

View from the Cape Bear Lighthouse

An amazing bit of history from this wind-battered, rusting little lighthouse perched on the edge of a small cliff now being undercut by the Atlantic waters, as are so many along that eroding coast. The station tour includes a lot of radio history to this effect, but unfortunately the radio operation display is completely inaccurate: I seriously doubt any Marconi operator used a Heathkit to hear the Titanic distress signal. (Consequently, if any generous radio historians have a Marconi station they would like to donate, this deserving Lighthouse Society would greatly appreciate the fitting gift.)

On the final leg of our trip, we visited another Marconi Station at a breathtakingly beautiful lighthouse–Pointe-à-la-Renommée–where it stands on a bluff overlooking the mouth of the St. Lawrence on the very northeastern tip of Quebec’s Gaspé peninsula. This station, sited by Marconi in 1904, has many historic displays with original photographs spanning the decades, copy from messages sent and received, and a guided history of the station. Pointe-à-la-Renommée also features a very respectable collection of telegraph keys and Marconi console receivers.  But the red lighthouse itself is the real show-stopper, with its gorgeously-faceted crystal above a charming lighthouse keeper’s house and cluster of outbuildings, on the green wind-swept bluff dotted with wild strawberries, and surrounded by the dark blue Atlantic waters far below.

Photos from Pointe-à-la-Renommée and the Marconi museum

Field Day with the Charlottetown Amateur Radio Club

Field Day coincided with our summer vacation, too, and I hated to miss hanging out with my local ham buddies on my favorite event day of the year. I decided to attempt to turn this relative misfortune into an opportunity: before we left on vacation, I did a bit of research and learned that there would be a Field Day event near Charlottetown, PEI.  After a few inquiring emails, I discovered that this Field Day site was only twenty minutes from where we were staying. The stars had clearly aligned.

One of the Charlottetown Amateur Radio Club members working SSB contacts.

On Field Day, I was greeted most warmly by the good folks at the Charlottetown ARC. They instantly took me in as one of their own–offering food and drink, and chatting with me as if I had always been a part of their club.  Best of all, when Field Day officially began, they put me on the mic on 20 meters. Evidently, they decided it would be fun to hear me announcing their callsign on the air in my southern accent. They got what they asked for! From the moment I took the mic, I had almost an instant pile-up; not because of my accent, however, but because Charlottetown offered one of the few stations on PEI, and the opportunity for participants to log the Maritime section.

I spent the better part of Saturday with them and hated to leave. Upon returning to the cabin and my family, I found that my artistic wife had created a little birthday present for me: a watercolor painting of my Vibroplex single-lever paddle.  Truly, the key to my heart. (Ahem!)

It was a wonderful Field Day, after all.

Looking back

Both the family vacation and my personal “hamcation” were a treat, and I’m ready to do this all again in the near future. Having such an extended stay made all of the difference, as I didn’t have to squeeze radio in, nor was it in competition with our other plans. Rather, radio became the thing I turned to when we were relaxing in the cabin, when my kids were drawing or playing, and my wife painting or reading–during our laid-back interludes between exploratory outings and adventures.

My Elecraft K2 turned out to be a superb off-grid transceiver

I did learn a few things about playing radio completely off-grid.  First of all, my QRP field events (like Field Day, FYBO, FOBB, etc.) had me totally prepped for off-grid ham radio. In fact I didn’t forget a single connector, battery, tool or accessory. Setting up my outdoor wire antenna was a simple matter and I had fun on the bands, even though propagation wasn’t always perfect.

What did surprise me was the number of times I turned to my portable shortwave radios over my PC-controlled receivers. Simply put, a good portable radio connected to a random length wire antenna gave the right amount of performance vs. battery consumption. Though the SDRs performed better when hooked up to my inverted vee, they used quite a lot of battery resources since both my laptop and the receiver had to be powered.

If I could go back in time, I would have left the Excalibur at home, brought a general coverage portable transceiver and/or a dedicated tabletop receiver like my Alinco DX-R8. Capturing spectrum on a very RF quiet island location is very appealing, though. To make it work, it would require that I bring a separate 12VDC power supply and spare laptop batteries.  With a modest PV system to recharge the batteries, it would also require constant planning–deciding when and where to listen, in order to recharge.

Most of all, I discovered that no matter where you go, as a ham radio operator, you will find others in your fraternity that will take you in. Field Day is one of my favorite days of the year and spending it with the good folks of the Charlottetown PEI Radio Club made it all the better. Not only did they get a kick out of hearing a southern accent announce their station on the air, but I got a kick out of being on the other end of Field Day pile-ups.

Hamcations don’t have to be month-long ventures, however.  Even squeezing a little radio time in can be fun. A portable shortwave radio tucked into your suitcase on an extended business trip or a portable QRP transceiver on a week at the beach can add to your holiday fun–and if you’re lucky, create a few memories, and possibly even friends.

My Pack List

Transceivers

Receivers

Accessories/Tools

  • One multi-band dipole
  • Sony AN-LP1
  • Grundig roll-up antenna
  • Radio tool box (connectors, tape, crimpers, wire, etc.)

Power

  • Qty 2 PowerFilm Solar 5 Watt foldable PV panels (FM15-300N)
  • Qty 3 PowerFilm Solar AA Foldable Solar Chargers (AA)
  • Qty 1 GoalZero Boulder 15 Solar Panel
  • Qty 1 GoalZero Escape 150 Power (Battery) Pack
  • Qty 1 30 aH gel cell battery in waterproof case

Again, I’d love for readers to share their upcoming travel and radio plans. Please comment!

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Guest Post: Backpack Shack 3.0 – Part 2

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Many thanks to SWLing Post contributor, TomL, who shares the following guest post as a his Backpack Shack 3 evolves:

Backpack Shack 3 – Part 2

by TomL

Wanting MOAR options for my recent amplified whip antenna experiment, I decided to add a second antenna input to the kitchen cutting board (can I call it a “Breadboard”? – Ha, that’s an electronics joke!).  The idea behind it came from realizing that I might not want to spend all my time outside at a picnic table or on the beach, especially if it is drizzly and windy. And I still wanted a better ground for the antenna.  So, I thought I could use more Trucker Parts and put an antenna on top of the roof of my vehicle so I could listen in the relative comfort and safety of my small SUV (or even a friend’s car).

Breadboarding

Here is the crowded “Breadboard” with some extra items added.

I thought of the vertical antenna as a short longwire and had an old, original RF Systems Magnetic Longwire Balun.  That device allows for an improvement in signal/noise ratio (in theory) if used on a longwire. Perhaps it works on this, too??  You can see the gray cylinder connected right beneath the trucker mirror mount on the left (this will not be tested at this time, see External Antenna below).  The output goes to a greenish Daiwa switch on the right.

A large amplified antenna has the real possibility of overloading the amplifier.  With the Magnetic Balun, I am hoping the VHF band is attenuated enough to preclude any problems because its response naturally tapers off past 40MHz.  But Mediumwave is well within its bandpass. I remembered an old Kiwa Electronics Broadcast Band Rejection filter not being used for a long, long time, so I connected that right after the Daiwa switch (the metal box with red plate).

This output then goes to an RF choke just before entering the pre-amp.  I figure I will be using my SDRPlay RSP2 and noisy laptop and wanted to try to reduce any interference traveling on the outside coax braid before it gets amplified.

External Antenna

OK, now for the other Daiwa switch selection.  The external antenna will be connected and disconnected as often as I use it.  I attached two right-angle coax adapters to be the connection point for the antenna.   This is so that the physical switch threads do not have to handle that wear-and-tear. You can see it as the fuzzy out of focus thing sticking up out of the left side switch position.

The wire going out the top of the Breadboard goes to a Firestik K-11 magnetic mount placed on top of the roof of the SUV.  I also wanted this to be connected to a magnetic balun. I just happened to have a nearly unused Palomar Engineers Magnetic Longwire Balun.  It has its own ground lug for use with a counterpoise. Temporarily, I left the 18 feet of wire that came attached to the K-11 Mount and attached an adapter and BNC test lead; on the other end is connected the spade lugs to the Balun (red wire to the lanyard nut, black wire to the ground lug).  It all fits neatly inside a Sistema 3 liter container.

The magnet and box self-clamp easily onto the roof of the vehicle.  I added a new 18 inch section to the Trucker Antenna Shafts creating a full 72 inch antenna, complete with mag mount, ground plane (car body), and magnetic balun.  It is very easy to put up and take down and the box helps keep everything contained.

I am pushing things a bit here.  Magnetic Baluns are not really meant to be used on vertical antennas.  It probably breaks some sort of Cosmic Electrical Law somewhere that causes electromagnetic waves to get very confused and die a horrible, twisted, circular death.  But I figure that it is an unbalanced “line” similar to a longwire antenna; it’s just a little short and goes straight up instead of horizontal! I like the idea, so I am going to run with it.

Warnings!

It goes without saying that the Antenna Shafts, magnet mount, and magnetic balun are weatherproof (but NOT lightning proof!).  Take proper lightning precautions and take it down.  Even so, I might add a small drainage hole to the box since it did rain a tiny bit during testing.

Secondly, this setup is ONLY FOR STATIONARY VEHICLES!!!!  DO NOT TRY TO DRIVE DOWN THE ROAD OR HIGHWAY!!!! The magnetic mount will NOT stay on the car and will damage your vehicle and maybe a vehicle travelling next to you!

Performance

As you can see from the picture, my new Tecsun S-8800 is getting a workout while connected to the Cross Country preselector (not shown behind it) and to the backpack next to the back seat window.  The Tecsun S-8800 is a nice radio. My copy has a couple of quirks that I might have to send it back (the AM band tunes incorrectly 2 kHz lower than it should and the SW SSB tunes 140 Hz higher than indicated and I have to compensate using the fine-tuning dial for these modes–FM seems correctly tuned).

Other than this, the actual performance is really quite good!  DSP does have sharp cutoffs to the IF bandwidth (especially resolving strong station interference when selecting 3 kHz vs. 4 kHz).  With all my filters/balun/choke, I did not notice any MW or FM breakthroughs and signals on those bands were nicely contained and “normal”.  Interference from my cell phone while looking up internet frequency listings was minimal – seems like the cable shielding, choke, and car roof are doing a good job.

The audio output jacks have very thin clearance between the jacks and the housing of the radio. So for the second time, I will not have recordings since the cable I wanted to use has home theater style construction with very thick plug outer connectors and will not fit!

From an RF-quiet “Forest Preserve” (County park), there were a variety of stations received from the 25 through 19 meter bands (Local time 11am-1:30pm). A few stations I have never heard before until now:

  • Radio Free Asia in Korean on 11985 KHz (Tinian Island)
  • Radio China International in Esperanto on 11650 KHz (Xian China)
  • Radio Farda in Persian on 12005 KHz (Wooferton England) – broadcast opposite my direction
  • Radio Bible BCI in Somali on 15310 KHz (Nauen Germany) – Strange sounding but interesting  Christian Somali music
  • Radio Free Asia in Chinese on 13675 KHz (Dushanbe Tajikistan)
  • Voice of Hope Africa in English on 13680 KHz (Lusaka Zambia) – had to use ECSS USB to get away from strong interference from RFA on 13675, fairly good intelligibility (including music)!  I wish there was a 6 KHz option for SSB mode since the audio was slightly muffled and could not compensate much with the tone controls. That kind of feature usually comes with radios costing 3X more, however.
  • Voice of Korea in French (Kujang North Korea) being squashed by Radio China International (Kashi China) in English on 13760 KHz

It was so nice not to be on a beach and have people walk by STARING at me with my weird radio/antenna setup.  And I was dry and comfy sipping a cool drink while there was a drizzle of rain pelting the windshield. Downside might be that the car setup cannot always be located optimally if I want to be next to that Very Large Body of Water (Lake Michigan) to help enhance reception but this is not a bad alternative.   The next test will have to be during early evening when signals are booming into my location and see if performance holds up under those conditions!

Happy Listening,

TomL

Modified Parts List

Parts Repeated from Part 1 article

As always, Tom, a most impressive setup powered by home-grown ingenuity! Thanks so much for sharing the evolution of your field kits with all of us here at the SWLing Post!

By the way, you still have me chuckling about your use of the term, “breadboard!” 🙂

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Self-powered shortwave radio spotted in Battlestar Galactica

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Many thanks to SWLing Post contributor, Bruce F, who writes:

Here is a photo of a radio from the 2004 – 2009 TV series “Battlestar Galactica“. This radio is perhaps unique and worthy of careful study! Why? Because not only was it NOT MADE on Earth, but there is no connection in its design with any other known radio ever.

The reason for this is quite simple. This sci-fi TV series takes place in a distant future when all humans had left the Earth generations ago and migrated throughout the galaxy. The humans in this series have lost all touch with humanity’s origin planet. They do not know where Earth is, or even if it still exists, or if it ever actually existed.

“Earth” is an important part of their religion and mythology. So here is a totally un-Earthly radio. Odd though. it does closely resemble a Grundig wind-up radio I owned sometime in the 2000’s…

Ha ha! Yes indeed, Bruce. And I can confidently say that I’ve personally distributed hundreds upon hundreds of this particular radio model for Ears To Our World. Grundig used to market it as the Grundig FR-200, and Tecsun still offers it as the Tecsun Green-88 (or GR-88). It’s a brilliant receiver, although I’m not sure how effectively one can monitor shortwave while in a spacecraft! 🙂

I also grabbed some screenshots from BSG with a number of radios some time ago. I’m not sure I ever posted it, though. I’ll have to look through my (rather deep) drafts folder.

Thanks for sharing, Bruce. I’ll add this post to our growing archive of radios in film!

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Hospitals and RF noise: FM and HD radio’s strong suit

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The Sangean HDR-14 AM/FM HD radio

For the past week, I’ve been away from home spending time with my mother at the hospital while she recovers from a surgery. I’ve got a number of reviews and evaluations in the pipeline, but thankfully no shortwave or HF radios on the table this week (although the ELAD FDM-S3 and CommRadio CTX-10 are just around the corner). Listening to shortwave (or even mediumwave) in a hospital room can be an exercise in futility–there are just too many devices emitting noise and the buildings are built like bunkers with incredibly thick walls to attenuate signals.

I’ve had the little Sangean HDR-14 with me, however, and have been very pleased with its ability to snag FM stations both analog and digital. I’ve also had fun discovering a surprisingly diverse FM landscape in this metro area. I haven’t snagged an AM HD station yet, but my hope is one evening I might DX one (fingers crossed and not holding my breath).

The Sangean HDR-14 (left) and CC Skywave SSB (right)

At the end of most days, I’ve been able to catch a little shortwave action with my CC Skywave SSB (pre-production) portable at the guest house where I’m staying. The evenings have been surprisingly peaceful here with only the occasional popup thunderstorm to insert a little QRN in my listening sessions.

Last night, while listening to jazz on FM, I finished reading All The Light We Cannot See by Anthony Doerr (affiliate link).

We’ve mentioned this book before and I know of at least dozen SWLing Post contributors and friends who’ve personally recommended it to me.

It is a superb novel and will, no doubt, tug at the heart strings of any radio enthusiast or WWII history buff. Highly recommended!

Indeed, last night I couldn’t fall asleep until I finished the book around 12:30 AM!

And mom? She’s recovering quite well and we hope will be discharged from the hospital soon.

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Raspberry Pi Vintage Radio

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This project was a winner in the Maker Share Mission May contest. While not strictly shortwave, of course, many of SWLing Blog readers enjoy, as I do, all things radio, and especially creative and new expressions of radio. Here is a brief excerpt from the MakerShare posting:

Vintage radios are fascinating. At one point the radio was the main method for mass communication of news and entertainment and was manufactured in a variety of styles to be prominently displayed in a home. Unfortunately, many vintage radios that have been physically preserved no longer function and it is impractical for them to be repaired. Described is the design and implementation of the Raspberry Pi Radio (RPiRadio), a device that bypasses the analog electronics of a vintage radio and digitally recreates the behavior of a vintage radio that is able to be tuned to vintage radio programming.

The whole posting may be found here, with extensive details on the building of the radio and how it was programmed for sound replicating the vintage radio era.

While I love tinkering with old radios and trying to bring them back to life, some radios are just beyond reasonable repair. This can bring old radios back to life in a way which seeks to honor their past – a very cool idea indeed!

Robert Gulley, AK3Q, is the author of this post and a regular contributor to the SWLing Post.       Robert also blogs at All Things Radio.

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Guest Post: Tom’s Backpack Shack 3.0

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Many thanks to SWLing Post contributor, TomL, who shares the following guest post:

Backpack Shack 3 – Amplified Whip Antenna

by TomL

So, having enjoyed using the Ferrite Sleeve Loop I created last year, I have wanted something a little more sensitive and less bulky.  I will eventually create a much BIGGER FSL antenna on the order of 2 feet long and perhaps 18 or 24 inches in diameter for indoor/attic use.  But that is not a priority at the moment.

Since I already have the DX Engineering Pre-Amplifier and the very nice Cross Country Preselector from the loop project, I thought it might be useful to create an active whip antenna for it.  And the cool looking Solar Red backpack needed something to do!

Power

Now that the bulky loop was not taking up the main compartment of the backpack, I could think about what else to put in there, like a larger power pack.  I scoured FleaBay for ideas and stumbled upon this contraption for backup power to network systems, the CyberPower CyberShield for Verizon.

This has 12 spaces for D-cell batteries and was mounted inside the demarcation terminal to provide backup power for things like cable systems and Copper-to-Ethernet networks.  It is not waterproof, so would be inside the premises of the customer getting the internet/cable service. But my Pre-Amp needs 12-18Volts and would love to have nearly unlimited power.  So, I bought a used one, cut the end off of the power lead and put on my own 2.1×5.5mm plug (carefully glued down and tie-wrapped). Then I filled it with 1.2Volt Tenergy D-cells.

Everything was just fine until I forgot to double check the polarity of the plug that I had wired onto the end.  Plugged it into the DX Engineering Pre-Amp, flipped the power switch and fitzzz…. The Pre-Amp light went on, then off (permanently!).

So, my expensive mistake is that I start using the FREE multimeter I got from Harbor Freight and check the polarity before I connect homemade battery packs to anything!!

DX Engineering charged me $60 to fix my mistake and it is working fine now after I swapped the wires on the plug. Yes, their Pre-Amp is NOT reverse-polarity protected! Disappointing, since the price tag for that device is $148!!!  The CyberShield now sits comfortably inside the bottom of the backpack.

Antenna

Now that the drama was over regarding the Power pack, I could think about the whip.  I did not want a wimpy whip! (No one should rightly aspire to this, in my opinion). More FleaBay searches found me looking at Trucker parts.  Loaded whips, magnetic mounts, 10 foot tall MFJ telescoping whips, etc was looking a bit expensive.

Besides that, I cannot fit a 10 foot tall telescoping whip into the backpack, I am limited to at most 18 inches (and that is at an angle to fit it in there).  But I found an old-fashioned mirror mount that looked promising since it had a nice SO-239 connector at the bottom and standard CB antenna fitting on top of 3/8”-24.

Then I found the 44 inch SuperAntenna with the same threads; then found the replacement Stainless Steel Shafts for a Wilson antenna in different lengths (I ordered the 10 inch version to test).  With a couple of rod coupling nuts and I was ready for testing!

Test Locations

I had already scheduled a short vacation to Sleeping Bear Dunes on the thumb of Northwestern Michigan, so I took this test setup with my Sony ICF-2010. This area is a very nice remote National Lakeshore with minimal noise.  I tried a beach setting and a couple of hilltop picnic areas (including meeting a local Porcupine) and had very nice reception at all locations. The hilltop locations are approximately 400 – 600 feet above the Lake (yes, the Dunes are THAT big there!).

Meeting a local Porcupine

Later on, I went to Grand Haven, MI on the way home and stopped at their very lovely beach.

Reception was just as good as the hilltop locations at Sleeping Bear! In both areas, I was next to a large body of water (in this case, Lake Michigan) and makes for an advantageous place for DXing!  I had also stopped at a Rest Area off the highway and that was a terrible place even though it was electrically quiet but nowhere near the big Lake. I guess the rumors are true about being near a large body of water somehow enhances reception of weak signals–?

I will submit recordings later since I lost the mini-B cable for the Sony digital recorder and had to order a replacement.  However, this was a nice project that freed up some space inside the backpack. I will add an 18 inch extension to the whip that will give me a total length of 72 inches.  Plus, it is mounted 12 inches up on the poly cutting board and I place the backpack on a small hunters folding chair that is about 24 inches tall. So, the tip will be about 9 feet off the ground.

Not pictured but I was also able to easily fit inside a used CCrane Twin Coil Ferrite antenna for mediumwave use that also performed very well.  I noticed that the picnic benches at some locations are made of metal, so that gives me a future idea of trying to leverage that to use as a ground plane somehow.  The battery pack is heavy but also gives great ballast to the backpack and will not tip over. Cannot wait for the Tecsun S-8800 to arrive so I can try leaving the radio inside the bag and just use the remote control to tune!

Happy Listening,

TomL

Parts List

As always, I’m so impressed with your spirit of radio adventure, Tom! I love the fact that your goal is to make a field-deployable DX kit that isn’t cumbersome or time-consuming to set up on site. I imagine you only need a couple of minutes to open the pack and have it on the air. 

Those DXing spots are stunning! I had no idea one could find 400-600′ dunes in NW Michigan–! With that said, I’ve heard that part of the state is one of exceptional natural beauty.  If you could somehow turn the lake into a body of salt water–thus increasing ground conductivity–you’d really enhance that already impressive reception! I’m guessing that sort of project would be a bit outside your budget! Ha ha!  That and the freshwater fish might protest!

To me, there is no better way to enjoy radio than finding a nice RF quiet spot in the great outdoors…no matter where you live in the world. On top of that, Tom, you’re constantly building, experimenting, documenting and sharing your findings–you’re a true radio zealot! Huzzah!

Post readers: Read Tom’s past contributions and articles by clicking here. 

Click here to read Backpack Shack 3 – Part 2.

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