Category Archives: DX

Radio in the field: SWLing on the coast of the St. Lawrence river

Yesterday, the weather was gorgeous here in Québec, thus a prime opportunity to find a beach, start a new book and, of course, play radio!

I found a fantastic spot on the north bank of the St. Lawrence river near Baie-St-Paul, Québec. There were only a few folks at the beach, so it was all very peaceful.

I found a picnic table perched on the edge of the beach shaded by an apple tree–a perfect spot to relax, play radio and start a new book: Dark Voyage by Alan Furst.

I brought two portables: the C. Crane CC Skywave SSB and the recently acquired Panasonic RF-B65.

I had not checked to see if propagation was good, but tuning to WWV on 10 MHz and 15 MHz confirmed that signals were travelling. In fact, as I started tuning around–first with the CC Skywave SSB, then with the Panasonic RF-B65–I discovered some of the best propagation I’ve experienced in ages!

I did a relatively quick scan covering the 31 through 19 meter bands. Some signals were absolutely booming in.

I jotted down some of the broadcast details on a make-shift log and recorded a few videos.

Note that after making the first video, I discovered I had limited space on my phone, so most of the clips are quite short:

The Voice of America

Click here to view on YouTube.

Radio France International

Click here to view on YouTube.

Radio Guinée

Click here to view on YouTube.

BBC World Service Extra English

Click here to view on YouTube.

Here are the stations I logged in the clear:

All in all it was a brilliant afternoon and the short band scan reminded me that there is still so much content to be found on the shortwaves.

You just need a little propagation, and some time to listen and explore!

Post readers: Have you snagged any elusive DX recently?  Please comment!

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Guest Post: Possible Last Remaining Direct Biafra QSL Emerges

Many thanks to SWLing Post contributor Dan Robinson who shares this fascinating story about what has to be “one of the most important occurrences involving a SWBC station that no longer exists — the Voice of Biafra”:


Biafra: One of the rarest of SWBC QSLs

by Dan Robinson

Many SWLing Post readers will no doubt have heard, in recent years, the  station Radio Biafra broadcasting via various relay locations on shortwave, and also on the Internet.

Those of us who have been SWLs for many decades remember the history of Biafra and the story of the original Voice of Biafra, which when the station was active on shortwave, before it was closed down by Nigerian government forces.

My own SWLing career began in the late 1960’s, but alas my receivers at the time, and my knowledge of what was on the air were such that I did not hear the transmissions from Biafra (I’m one of those who regrets having missed many former tropical band broadcasters, such as Tonga, Fiji, Gilbert & Ellice Islands (later known as Kiribati) when they used shortwave, and Biafra was on that list as well).

I first learned about the original Radio Biafra from articles written by the late Don Jensen.

In one of those [download PDF], Don re-printed a copy of one of the most famous SWBC QSLs of all time — a Biafra verification sent to DX’er Alan Roth.

Typed on a piece of notebook paper, it had “Broadcasting Corporation of Biafra, P.O. Box 350, Enugu” at the top. Three paragraphs of text followed, referring to Roth’s reception dated January 28th, 1969 of the station on 7,304 kHz.

Pictured with the letter to Roth was the envelope with “Republic of Biafra” mailed from the Biafra mission on Madison Avenue, in New York City.  I will always remember the caption, which said that Roth had taken his reception report to the Biafran delegation office which:

“managed to get it flown into the breakaway nation with other official correspondence, on the emergency airlift.  Radio Biafra’s chief engineer wrote the verification letter and returned it via the same route. . . a high contrast photo was required to bring out the typing since a well-born typewriter ribbon had been used.”

For decades this Biafra verification to Roth was indeed considered to be the only one in existence, though because so many SWLs and DX’ers were active through the years, it’s always difficult to state this with certainty.

Those of us who collect historic SWBC QSLs, going through thousands of eBay listings, always keep an eye out for cards and letters and station materials.

So it was that a few weeks ago, as I was doing my usual due diligence looking through eBay listings, I noticed something unusual.  Listed among SWBC QSLs from a seller in Ithaca, New York was something astounding — another Biafra verification letter!

 

Looking closely, it seemed to be exactly like the famous QSL letter sent to Alan Roth in 1969, with the exact same date, but sent to a James G. Moffitt, in Dallas, Texas.

Days ticked by — I had the QSL on ‘watch’ status on my eBay account, and as I do for any QSL of high value, I also had it on automatic bid status.  For this piece of SWBC history, my maximum bid was very high, something I rarely do unless the item has extreme historic or collectors significance.

I envisioned furious bidding for this Biafra verification, but in the end only four bids were recorded.  I won the QSL at what I consider to be a very low price ($81) considering its rarity.

Now, the rest of the story.

It turns out that among the three other bidders was none other than Jerry Berg, DX’ing colleague and author of so many wonderful books on the history of shortwave.

As I was preparing to complete this story for SWLing Post, I emailed Jerry who had already written up a comprehensive story about this newly-discovered Biafra verification.

Jerry’s superb article also includes links to the late Don Jensen pieces (The Life and Death of Radio Biafra and Biafra’s Incredible Radio), as well as a link to a recording of Voice of Biafra made by one of the other big names in the hobby, Al Sizer:

The “Undiscovered QSL of Radio Biafra”, as Jerry calls it in his new article, now resides with me here in Maryland.  Unless/until another of its kind emerges somewhere on the QSL market, it has to be considered the only one of its kind in the world.

As for the question of whether this previously “undiscovered” QSL is genuine, Jerry notes the similarities between the Roth QSL letter from 1969, and the one sent to James G. Moffitt, who he notes was active as a DX’er in the days when Radio Biafra existed.

Jerry continues:

“. . .what about the common date, and date-time-frequency details, in the two veries? If the reports had arrived in Biafra at roughly the same time, it would not be unusual for the replies to be prepared on the same day.  As to the common date-time-frequency details, perhaps whoever typed the letters thought these references were standard boilerplate rather than information that was to be tailored to the specific listener. Certainly the frequency could be expected to be the same. The common date of reception is harder to explain, but it is not difficult to see how the almost inevitable difference in dates of reception could have been overlooked. QSLers know that verifications can be wrong in their details, misdated, even sent to the wrong listener. As for the different fonts, and for Alan’s letter being light in appearance and Moffitt’s dark, perhaps the typist changed typewriters because one was running out of ink. We will likely never know for sure, but I think the Moffitt verie (which sold on eBay for $81) is genuine. In any event, the story reminds us how, in every endeavor, even shortwave listening, today’s connected world can cast new light on old events and turn longstanding certainties into question marks.”

I am quite happy with having acquired what surely is one of the rarest of SWBC QSLs.  It has been added to a collection that, in addition to my own QSLs that I carefully kept over the years, includes other unique cards, including one from ZOE Tristan da Cunha and the station at the former Portuguese Macao.


Amazing story, Dan! It pleases me to no end to know that someone who values our shortwave radio history–and does a proper job archiving it–has acquired this amazing piece. I especially appreciate the time that you and Jerry Berg put into sharing the history of the Voice of Biafra with the shortwave listening and DXing communities. Thank you!

Readers: As Dan suggests, I strongly encourage you to check out Jerry’s website, On The Shortwaves. It’s a deep treasure trove of radio history.

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August 2018 Rockwork Ocean Cliff DXpedition most distant AM-DX

Many thanks to SWLing Post contributor, Gary DeBock, who shares this note from the recent Rockwork Ocean Cliff DXpedition:

The most distant AM-DX received during the August 2018 Rockwork Ocean Cliff DXpedition was 558-6WA in Wagin, Western Australia, received during the last session (9 out of 9) at 1252 on August 9th. At 9,154 miles (14,732 km), the ABC “Nightlife” program content was matched to the related ABC website Podcast. The co-channel music is from 558-Radio Fiji One This was received on an XHDATA D-808 portable boosted by a 17″ FSL antenna:

Click here to download the audio file.

What an impressive catch, Gary! Thank you for sharing!

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Gary shares some catches from the first day of the Rockwork 5 DXpedition

FSL Antennas poised to grab DX! (Photo: Gary DeBock)

Many thanks to SWLing Post contributor, Gary DeBock, who shares an update from the latest Rockwork (Utralight) DXpedition. Gary notes (in bold):

First day FSL antenna setup at the Rockwork 5 ocean cliff near Manzanita, Oregon (Craig Barnes in the photo)– outstanding conditions for 558-Fiji and 1017-Tonga!

558 Radio Fiji One Suva, Fiji Awesome signal with island music and medley song ID on the half hour at 1230 (including “Radio Fiji One, Na Domoiviti” at 1:36) :

Click here to download audio.

765 Radio Kahungunu Napier-Hastings, NZ The usual S9 signal from this 2.5 kW overachiever with distinctive Maori music at 1218:

Click here to download audio.

1017 A3Z Nuku’alofa, Tonga Monster signal with island music at the start of the session at 1221:

Click here to download audio.

Monster signal with island music near the close of the session at 1314 (in other words, all session long):

Click here to download audio.

Wow! Impressive catches, Gary! Someday I would love to join your team as you snag signals from the edge of the Rockwork cliff.

Thanks for sharing, Gary and good DX!

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Impressive Transatlantic FM DX: Newfoundland to Northern Ireland on 88.5 MHz

(Source: Southgate ARC)

88 MHz Trans-Atlantic signals heard in Ireland

On Sunday the 8th of July 2018, there was a remarkable opening on the VHF bands across the North Atlantic. While there were plenty of strong multi-hop Sporadic-E signals on the 28 MHz and 50 MHz bands, the maximum qusable frequency did reach as high as 88 MHz at one stage.

Paul Logan in Lisnaskea, Fermanagh, Northern Ireland managed to catch CBC radio 1 on 88.5 MHz from Newfoundland, Canada at 22:35 local time (21:35 UTC). It is very rare for openings on Band 2 across the Atlantic and to date, only two people have managed to succeed in hearing North American radio stations.

Click here to view video of reception on YouTube.

Click here to read the full article on EI7GL’s blog.

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Guest Post: Backpack Shack 3.0 – Part 2

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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Guest Post: Tom’s Backpack Shack 3.0

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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