Author Archives: Thomas

Listening to an AM broadcast station on the BC-348Q

I listen to my BC-348Q most days; in fact, it’s my preferred way of receiving my morning dose of Radio Australia on 9,580 kHz. And although you won’t find any medium-wave DXers endorsing this beefy antique rig, the BC-348, with its warm tone, has turned out to be a great shortwave receiver for casual listening.

When the armed forces commissioned the Signal Corps BC348 during WWII, the last thing they wanted was to have on-duty personnel listening to AM broadcast bands during, say, bombing sorties––so they purposefully omitted the medium-wave band. The band selections in the BC-348 are as follows:

200-500 KC.
1.5-3.5 MC.
3.5-6.0 MC.
6.0-9.5 MC.
9.5-13.5 MC.
13.5-18.0 MC.

But here in the comfort of my radio digs three-quarters of a century after WWII, I recently discovered that this classic “hot war” receiver does, indeed, pick up one of my local AM broadcast stations: WTZQ, and on 1,600 kHz. WTZQ has become one of my favorite stations; it’s one of the few in this region that’s still actually independently owned. The station’s playlist spans the decades, including, as they say, “everything from Glenn Miller to Steve Miller.” And, since they’re on “1.6 MC” they make the cut on the ‘348’s second-band selection. How cool is that?

WTZQ’s station is a good thirty miles from here as the crow flies, so reception usually includes a little static on the wire antenna I’ve connected to the BC-348. Still, you might enjoy this short audio clip of WTZQ via the BC-348Q:

You can stream WTZQ, by the way, via their website. Enjoy!

Community stations provide lifeline of info in post-quake Nepal

Raspberry Pi 2 API for the SDRplay RSP

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Many thanks to Jon Hudson at SDRplay who notified me that they have released a Raspberry Pi 2 API for the SDRplay RSP receiver. Note that the API is a “pre-release” version and you’ll need to reference the included Linux installation notes.

If you have the RSP and a Rasberry Pi 2, you might consider trying the new software. The SDRplay development team are eager to hear feedback.

Click here to download.

Shortwave Radio Recordings: Radio Romania International

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For your listening pleasure: 1.5 hours of Radio Romania International, starting with RRI’s English language service.

This recording was made on May 25, 2015 starting around 00:00 UTC on 9730 kHz. I used the TitanSDR Pro software defined receiver and skyloop external antenna to make this off-air recording. In truth, this is one of the few remaining broadcasters that targets eastern North America; even a simple portable radio would have sufficed.

Click here to download the full recording as an MP3, or simply listen via the embedded player below:

Honoring Memorial Day: The White Cliffs of Dover

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Dame Vera Lynn

Today is Memorial Day, and I’m feeling humbly grateful to all of those who paid the ultimate sacrifice for their country. Since I’ve been reading a lot of WWII history lately, I’ve also been playing a lot of WWII-era music here in my sanctuary to all things radio.

Few songs sum up the yearning sentiment of World War II better than Vera Lynn’s 1942 rendition of “The White Cliffs of Dover.” It’s an iconic song, one that helped British soldiers see beyond the war while mourning its painful toll. It was written in 1941 when England was taking heavy casualties, just before American allies joined the effort.

This morning, seeking something with a little authenticity, I played “The White Cliffs of Dover” though my SStran AM transmitter, and listened to it through “Scottie,” my WWII-era Scott Marine radio (above). I made this recording by placing my Zoom H2N recorder directly in front of the Scott’s built-in monitor speaker.

So here you go: a little radio tribute to all of those who fell–on both sides–of that infamous second world war.

And thanks to all who serve and have served in the name of “peace ever after.”

Click here to download the recording as an MP3, or simply listen below:

Jack Barsky: KGB spy who relied on numbers stations

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Many thanks to SWLing Post reader, Anthony, for forwarding this CBS/60 Minutes video: an interview with former KGB spy, Jack Barsky. During the interview, Barsky mentions that he received encrypted KGB “radiograms” via a numbers station he believed to be in Cuba. He admitted that the messages could take an hour to copy, then an additional three hours to decode. This is a fascinating story–well worth watching.

Here is the intro via 60 Minutes:

“Tonight, we’re going to tell you a story you’ve probably never heard before because only a few people outside the FBI know anything about it. It’s a spy story unlike any other and if you think your life is complicated, wait till you hear about Jack Barsky’s, who led three of them simultaneously. One as a husband and father, two as a computer programmer and administrator at some top American corporations and three as a KGB agent spying on America during the last decade of the Cold War.

The FBI did finally apprehend him in Pennsylvania but it was long after the Soviet Union had crumbled. What makes Jack Barsky’s story even more remarkable is he’s never spent a night in jail, the Russians declared him dead a long time ago, he’s living a quiet life in upstate New York and has worked in important and sensitive jobs. He’s now free to tell his story…as honestly as a former spy ever can.”

Click here to view the video via CBS online, or you can simply watch via the the embedded players below:

Part 1

https://www.youtube.com/watch?v=uV39GSN_Ovw

Part 2

https://www.youtube.com/watch?v=70-2OAa7TGU

Dave says not all Jameco power supplies are linear and regulated

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Note that not all power supplies are listed as “regulated linear”

Many thanks to SWLing Post contributor, Dave Zantow (N9EWO), who replies to a post published yesterday regarding some of Jameco linear power supplies. Dave writes:

“A bit of a caveat on Jameco’s these so called Linear power supplies. This is based from my own experiences so is not fiction.

Bottom of this page : http://www.jameco.com/Jameco/catalogs/c151/P92.pdf

Over the years some of (but not all) these Jameco linear regulated power supplies are no longer clean for radio use.

Without changing the model number or description of the product, they have made changes with some (or much of ??) this “Linear Regulated” adapter line. Indeed they are still using a good old power transformer, but when it comes to the regulator part of the adapter, they have gone to switching type regulator device. So it produces a nice strong whine on a radio receiver just as a full fledged switching supply.

I had purchased a number of these so called linear supplies (sorry I no longer have the exact model number noted that I ordered) and experienced awful interference with any radio receiver. So I cracked open one of these to see what was up here and sure enough it was using a MC34063A inverting switching regulator .

Called Jameco and they flat out denied that they were using any switching devices in this Regulated LINEAR Jameco ReliaPro adapter. So I then sent a nasty gram email to the CEO of Jameco. I received an email back (was from the CEO too) and after some research they FINALLY did admit a change was made in some of the product line to use of a switching regulator . But he strongly made the point they would continue to still market these adapters as totally linear (yeah right ….nice guys).

I must add here that it does (or did not) NOT affect the entire line of these linear regulated adapters. About a year ago I ordered more (already had a few before) of the 12 volt 1 AMP model 170245 , and these are (or were anyway) totally clean and are excellent.

Also note that Jameco purchases up surplus “linear regulated” adapters from time to time. This 6 volt 500 ma one here is an example and is (or was anyway) nice clean one and uses no switching regulators. Our 2 tested samples of this adapter from about 5 years ago used a nice 7806 analog regulator. Perfect for use with many SW portables, (including the Sony ICF-SW7600GR with a plug change). But a warning again from experience , they are all subject to changes without any warning (and this one may have changed too for all we know ??)

They appear to stick the ReliaPro name as the manufacture on all adapters (if it was made by Jameco or not)

So Caveat Emptor.”

Duly noted, Dave! I’ve also noted that not all of the power supplies on their linear power supply page are listed as being a linear supply (see screen grab at top of page).

I may contact Jameco about this too and see if they can adjust their search results to properly reflect a selection of regulated linear supplies.