Malahit DSP-2 Review Update 3: Dan evaluates the latest hardware version

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Many thanks to SWLing Post contributor, Dan Robinson, for the following guest post:

UPDATE NO 3: Malahit DSP-2 (August 18, 2021)

A few weeks ago, I wrote about my experiences with the Russia-made Malahit DSP-2 receiver, and made a recommendation that potential purchasers of the receiver hold off until the design team in Russia made some changes.

Weak points included the SMA antenna connector – specifically the short cable going from the antenna to the PCB board, and sharp noise spikes seen at numerous locations throughout the spectrum from mediumwave up to 30 MHz.

My particular DSP-2 unit went dead after an update to an early version of the 2.10TEST firmware.  At the time, I had spoken via Skype with Georgiy on the Malahit team and kept up a string of communications on the Malahit Telegram channel.

It was not clear to me whether the problem with the first DSP-2 was primarily due to SMA antenna issues or also due to a problem with the firmware update I had applied at the time (it was an early version of 2.10TEST).

My appreciation goes to Georgiy who decided to send a new DSP-2 to me.  This took about 3 weeks from the end of July until just recently when the receiver arrived (though the U.S. Postal Service made the end of that journey quite interesting).

Here are some observations that I hope will help current and prospective owners of the DSP-2: Continue reading →

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Carlos Latuff’s shortwave radio logs are a work of art

For those who don’t know, our friend and SWLing Post contributor, Carlos Latuff, is not only a devoted radio enthusiast, but also a prominent political cartoonist in Brazil and throughout the world.

Recently, Carlos has been posting his shortwave logs on his Twitter feed and they’re pretty amazing.

Carlos’ shortwave logs not only include comments and notes from each broadcast, but also his own artwork.

Here’s Carlos’ recording of Vatican Radio which accompanies the log at the top of this post:

Click here to check out Carlos’ Twitter feed where he posts his political cartoons and, yes, even the occasional shortwave listening log!

If you’ve been a reader of the SWLing Post for long, you’ll notice that we’re not a space for political discussions; there are much better options out there on the Internet. Here, we stick to the world of radio, but we can’t help but highlight this intersection and Carlos’ creative logs.

In fact, Carlos, I might nudge you for that Vatican Radio recording and your artwork to post on the Shortwave Radio Audio Archive!

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Radio Waves: North Korea Fights Outside Influence, Phishing Scam Uses Morse Code, The Power of Radio, and Afghanistan International TV

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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!

That’s ‘Comrade’ To You! North Korea Fights To Purge Outside Influences On Language (NPR)

SEOUL — In the show Crash Landing on You, a rich South Korean woman accidentally paraglides into North Korea, where she is rescued by an army officer and falls in love with him. The series, which was released on Netflix in 2019, was a hit across the Korean Peninsula — including in the North, where it circulated on smuggled thumb drives.

“It created quite a stir, with Kim Jong Un even forbidding people from watching it,” says Kang Nara, a North Korean defector in Seoul who served as a consultant to the show.

That’s not surprising, as all South Korean content is effectively banned in North Korea.

Kang says she found Crash Landing on You appealing for its realistic depictions of life in the North, including the language. As in real life, North Koreans in the drama, for example, call their intimate partners “comrade” instead of “honey.”

But differences in language from the South are a sensitive issue for the North Korean regime. It has fought for more than half a century to purge North Korea’s language of foreign influences, and for roughly two decades to keep out southern-style expressions that northerners are gleaning from bootlegged South Korean TV dramas, movies and K-pop music. [Continue reading…]

Microsoft catches hackers using Morse Code to help cover their tracks (CyberScoop)

Clever hackers use a range of techniques to cover their tracks on a target computer, from benign-looking communication protocols to self-erasing software programs.

It’s not very often, though, that digital attackers turn to Morse Code, a 177-year-old signaling system, for operational security. Yet that’s exactly what played a part in a year-long phishing campaign that Microsoft researchers outlined on Thursday.

Morse Code — a method of representing characters with dots and dashes popularized by telegraph technology — was one of several methods that the hackers, whom Microsoft did not identify, used to obscure malicious software. It’s a reminder that, for all of their complexities, modern offensive and defensive cyber measures often rest on the simple concept of concealing and cracking code. Continue reading →

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Dean spots a radio in Pulp Fiction and shares a little shortwave by train

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Many thanks to SWLing Post contributor, Dean Bonanno, who writes:

Hi Thomas –

I was re-watching one of my all time favorite movies yesterday, Pulp Fiction, and noticed a radio in a scene for a second or two [see image above]. It went by so fast I thought it might have been a Trans Oceanic 7000 at first but upon looking backing and stopping film, it is an Arvin Radio. I was wondering if anyone knew model/year.

I also included a video clip of Radio Tumbril Encore from aboard Amtrak’s Capitol Limited for exactly a week ago. I did some DXing while crossing the country by train. The video is near Pennsylvania/Maryland border (near you perhaps) on WRMI 15770 in 1300utc hour (enlarge video you can red it on PL 880 screen). I have another video while pulling into Cumberland, MD. Continue reading →

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Grayhat’s NCPL (Noise-Cancelling Passive Loop) antenna “tweak”

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My NCPL antenna

Many thanks to SWLing Post contributor, Grayhat, who shares the following modification he made to a Noise-Cancelling Passive Loop antenna last year. He’s kindly allowed me to share his notes here, but apologized that at the time, he didn’t take photos of the project along the way and recycled many of the components into yet another antenna experiment.

Grayhat writes:

Here’s a simple tweak to the NCPL, made easy for anyone. Let’s start with the commercial NooElec 9:1 balun version 1 (not 2) … made in USA.

Look at the schematic of the balun:

Cut the R1 (0 Ohm resistor – jumper) so that the center tap of the transformer won’t be connected to ground, then solder a short piece of wire to the tap.

The first pic (top) shows the balun seen from top side, the arrow indicates the small hole going to the transformer tap.

This pic shows the bottom of the board with the trace to cut and the spot for soldering the tap wire (needs cleaning with a bit of sandpaper to remove the cover paint). The solder is as easy as 1-2-3 once the trace is cut and the spot cleaned just insert a wire from the top of the board and solder it to the bottom and there you go!

Build the NCPL using “fat” coax (RG8 will do) with the top cross connection.

NCPL modification schematic

Side note: the top “cross connection” is the weak point, so it would be a good idea putting a short piece of (say) PVC pipe over that point, the piece will also help suspending the loop or sticking its top to the support pole, as for the feedpoint, a small electrical junction box will fit and protect the tiny balun from bad weather

Now the difference: connect the two center conductors of the NCPL to the balun input and the braid to the wire going to the center tap (as above).

Such a configuration will give some advantages over the “standard” NCPL one. The loop will now be galvanically isolated from the feedline/receiver so it will have much less “static noise.” Due to the tap, the typical 8 pattern of the loop will be preserved, this means that the loop will now have much deeper nulls.

By the way, the balun could just be wound w/o buying it. I suggested the nooelec since that way anyone with little soldering ability will be able to put it together. Oh and by the way it’s then possible adding a small preamp at the balun output if one really wants, any preamp accepting a coax input will work. 🙂

Again, if you can/want, give it a try !

Many thanks for sharing this, Grayhat! We always welcome your inexpensive, innovative urban antenna projects!

Post readers: If you have question, feel free to comment and I’m sure Grayhat can help. 

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Dan watches aurora as seen from the ISS

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Many thanks to SWLing Post contributor, Dan Van Hoy, who writes:

I just happened to stop by the ISS live stream and catch a very substantial aurora. Not what we want for good shortwave radio conditions, but a wonderful sight nevertheless. Astute observers will note the location of the ISS and the fact that it’s not likely an aurora would extend to that area. It appears this moment was pre recorded to fill in some dead air (LOS). Still a thrill to see. Nice, peaceful music on the Youtube stream too!

Two sites for ISS live stream viewing are:

https://eol.jsc.nasa.gov/ESRS/HDEV/

and

https://youtu.be/EEIk7gwjgIM

73, Dan…VR2HF

Wow! Thank you, Dan. I find the ISS live feed mesmerizing. If I had decent Internet at home, I believe I would keep the feed live on a monitor at all times.

Thank you for sharing this!

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