Tecsun PL-365 scanning question

Many thanks to SWLing Post contributor, Julien, who writes with the following question:

First, thanks for your site !

I have a question about PL-365. It seems auto-scan works only in the range of 2,245-21,950 kHz. The ranges from 1,711-2,245 and 21,950-29,999 can only be scan manually.

Do you know the reason for this? Or a trick to auto-scan the other two ranges?

I do not know the reason for the auto scan limits, but imagine it could be a limitation of the SiLabs DSP chip inside–although this is merely a guess. My hope is that someone in our community can verify or perhaps help if they know of a work-around. Please comment!

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FTIOM & UBMP March 1-7 & Special Marathon

Special 12-Hour Marathon of From the Isle of Music and Uncle Bill’s Melting Pot
March 4 0800-2000 UTC:
On Wednesday, March 4, Radio Channel 292 from Rohrbach Germany will present a special 12-hour marathon of From the Isle of Music and Uncle Bill’s Melting Pot on 6070 Khz from 0800 to 2000 UTC. There will be a special e-QSL for reception reports for the marathon.

From the Isle of Music, March 1-7:
This week, our special guest is Daymé Arocena, who will converse with us in English about her beautiful new album, Sonocardiogram.
The broadcasts take place:
1. For Eastern Europe but audible well beyond the target area in most of the Eastern Hemisphere (including parts of East Asia and Oceania) with 100Kw, Sunday 1500-1600 UTC on SpaceLine, 9400 KHz, from Sofia, Bulgaria (1800-1900 MSK)
If you don’t have a shortwave radio or are out of range, you can listen live to an uplink from a listening radio in the Netherlands during the broadcast at
http://websdr.ewi.utwente.nl:8901/?tune=9400am
2. For the Americas and parts of Europe, Tuesday 0000-0100 (New UTC) on WBCQ, 7490 KHz from Monticello, ME, USA (Monday 8-9PM EST in the US).
If you don’t have a shortwave or are out of range, you can listen to a live stream from the WBCQ website here (choose 7490): http://www.wbcq.com/?page_id=7
3 & 4. For Europe and sometimes beyond, Tuesday 1900-2000 UTC and Saturday 1200-1300 UTC on Channel 292, 6070 KHz from Rohrbach, Germany.
If you don’t have a shortwave radio or are out of range, you can listen live to an uplink from a listening radio in Europe.
Visit our Facebook page at https://www.facebook.com/fromtheisleofmusic

Uncle Bill’s Melting Pot, March 1 and 3:
Episode 153 takes us to Serbia.
On WBCQ only, there is a second half-hour featuring one of the first episodes of our show in 2017.
The transmissions take place:
1.Sundays 2200-2300 NEW UTC (6:00PM -7:00PM Eastern US) on WBCQ The Planet 7490 KHz from the US to the Americas and parts of Europe
If you don’t have a shortwave or are out of range, you can listen to a live stream from the WBCQ website here (choose 7490): http://www.wbcq.com/?page_id=7
2. Tuesdays 2000-2030 UTC on Channel 292, 6070 KHz from Rohrbach, Germany for Europe.
If you don’t have a shortwave radio or are out of range, you can listen live to an uplink from different web SDRs in Europe.
Visit our Facebook Page at https://www.facebook.com/UncleBillsMeltingPot

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Jesse’s DX-390/ATS-818 modifications

Many thanks to SWLing Post contributor, Jesse (W9JES) who writes:

I’ve been busy enhancing my Radio Shack DX-390. I added an IF-Out jack for my SDR, changed out the light for a LED, added a latch circuit for the light switch, added static protection, and disabled auto-mute. My blog with full instructions is at www.w9jes.com

Thank you, Jesse!  Here are links to the various modifications Jesse has documented:

Click here to check out Jesse’s website.

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Mystery Solved: Readers identify curious interval signal

Yesterday, we published a post asking SWLing Readers to help Brian (W9IND) identify an elusive interval signal (click here to read that post).

We received dozens of replies–thank you so much!

Many readers immediately identified the tune as some sort of utility station placeholder for Point To Point communications. Turns out, they were correct.

Many thanks to Dean Bianco who was the first reader to solve the mystery.

Dean discovered that the interval signal was for the Voice Mirror of the PTT Habana, Cuba.

Dean verified it via Rainer Brannolte ‘s excellent website, UtilityRadio.com.

Here’s the audio clip from Rainer’s website:

Here’s a link to the PTT Habana Cuba page which also includes two other audio clips of the PTT service.

Rainer even includes a scan of his verification letter:

Click to enlarge (Source: Rainer Brannolte)

This morning, I received a number of responses from readers confirming PTT Habana–thank you so much!

Not only have we helped Brian ID the station, but now there’s also one less UNID audio sample on the Shortwave Radio Audio Archive.

In addition, I’m sure my friend Greg Shoom–who originally posted the recording–would be very pleased with this community effort.

Now I need to find some more shortwave archive mysteries to solve!

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Radio Waves: Birmingham Museum (BBRM), Si4730 Radio, Ham Radio at Camp Lejeune, and the Oakland A’s Leave Radio

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’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Pete Eaton and Bill Patalon for the following tips:


The Rich History of Birmingham’s Black Radio Museum (Birmingham Times)

The Birmingham Black Radio Museum (BBRM) began as a project for Bob Friedman in 1992 to commemorate the first 50 years of a single radio station, 1400 WJLD-AM, and it grew to chronicle black radio in the Magic City.

After moving to Birmingham from his native New York City, N.Y., in 1987, Friedman worked at WJLD, where he started a 1950s vocal-group harmony show in April 1989 and later began a Saturday morning talk show, “Sound Off.” About two and a half years into his 22-year tenure at WJLD, he asked to produce a retrospective about the station’s first half century.

“I put together a pamphlet [about the station] and got people to buy ad space in it,” he recalled. “I also had a Saturday morning show, so I could promote it.”

Friedman, BBRM Founder and Director, recorded interviews with on-air personalities, including Ed “Johnny Jive” McClure, Jesse Champion Sr., and Lewis White.

“I started learning about this unbelievable history of black radio in Birmingham,” Friedman said. “And that sent me on a track, so that even though I left WJLD in 2011, I had already incorporated the BBRM.”

The museum, largely based online at www.bbrm.org, tells of stations that include WJLD, WENN, WAGG, WSGN, and Bessemer’s WBCO. Personalities include but are not limited to legends Dr. Shelley Stewart, Paul “Tall Paul” White, Willie McKinstry, the Rev. Dr. Erskine Faush, and Roy Wood Sr. The physical home is inside the Alabama Jazz Hall of Fame in the Carver Theater, which is currently closed for repairs.[]

All Band Radio Uses Arduino and SI4730 (Hackaday)

It is getting harder and harder to tell homemade projects from commercial ones. A good case in point is [Mirko’s] all band radio which you can see in the video below the break. On the outside, it has a good looking case. On the inside, it uses a Si4730 radio which has excellent performance that would be hard to get with discrete components.

The chip contains two RF strips with AGC, built-in converters to go from analog to digital and back and also has a DSP onboard. The chip will do FM 64 to 108 MHz and can demodulate AM signals ranging from 153 kHz to 279 kHz, 520 kHz to 1.71 MHz, and 2.3 MHz to 26.1 MHz. It can even read RDS and RBDS for station information. The output can be digital (in several formats) or analog.

The radio takes serial (I2C) commands, and the Arduino converts the user interface so that you can control it. The chip comes in several flavors, each with slightly different features. For example, the Si4731 and Si4735 have the RDS/RBDS decoder, and the shortwave mode is available on Si4734 and Si4735.[]

Fitting 19th Century technology into 21st Century warfighting (DVIDS)

CAMP LEJEUNE, N.C. (Feb. 7, 2020)— U.S. Marines with Information Group, II Marine Expeditionary Force (II MIG) participated in a HAM Amateur Radio General Licensing Course as part of the group’s High Frequency Auxiliary Initiative on base, Jan. 27-31, 2020.

The course, taught by members of the Brightleaf Amateur Radio Club, out of Greenville, N.C., helps Marines learn the principles of high frequency radio operations as a contingency against a peer-to-peer adversary in real-world operations.

Throughout the duration of the course, Marines learned HAM radio frequency and propagation theory, frequency band allocation, conventional and field-expedient antenna theory in addition to HAM radio operations and control.

U.S. Marine Corps Col. Jordan Walzer, commanding officer of II MIG, created the High Frequency Auxiliary Initiative after recognizing the need for utilizing more options in a combat environment. He wanted the Marines to familiarize themselves with older technology to ensure their lethality in any situation.

“Embracing technology is great but overreliance leaves us vulnerable,” Walzer said. “In a peer-to-peer conflict, our space-based capabilities will be attacked. The next war will look less like ‘Saving Private Ryan’ and a lot more like ‘Ghost Fleet’.”

Contrary to Saving Private Ryan, which was fought utilizing traditional land-based maneuver warfare, Ghost Fleet is a book set in the near future and includes the addition of space and cyber warfare.

So wars of the past were fought in the air, on land and at sea, whereas future wars will likely include the addition of space warfare, explained Walzer. U.S. forces need to create a cohesion of modern technology and analog throwbacks to mitigate hackers and drones.

HAM radios make effective alternate communication because they do not rely on satellites or internet, but instead, radio waves. They can travel directly or indirectly, along the ground or by bouncing the radio waves off of the ionosphere or troposphere layers of the atmosphere to communicate.

“Right now, our adversaries are aggressively pursuing counter-space weapons to target our satellites and ground stations,” Walzer said. “If our satellites get knocked out, what do we do then? [High Frequency] radio has been around for well over a century and is still used today. Why? Because it’s a reliable, low-cost alternative to satellite communications. With the right training and education, a Marine with a radio and some slash wire can communicate over-the-horizon for long distances, even between continents.”

HAM radios, also known as amateur radios, are communication devices created in the late 1800s. Depending how much an individual is willing to spend on equipment, someone can talk to others across town or across the world, all without the need for an internet connection. Although most people use HAM radios as a hobby, II MIG views them as potential lifelines in a highly contested environment.

There are three courses taught on HAM radios by the Brightleaf Amateur Radio Club. The entry level class is called the technicians course, which gives people frequency privileges in very high frequency (VHF) and ultra-high frequency (UHF) bands and some privileges in the high frequency range. A frequency privilege is just another meaning for permission to use a specific frequency. The HAM Amateur Radio General Licensing Course is the intermediate level course, which allows spectrum privileges on almost all spectrums that the government gives amateur radio operators. The expert class license, also called Extra Class, gives users full privilege on any frequencies allocated to HAM radios.

“I think the course was very informative,” said Sgt. Matthew Griffith, an intelligence surveillance reconnaissance systems engineer with 2nd Radio Battalion, II MIG. “It’s good to learn the things that make our equipment work. In my area of this field we use the equipment but don’t [always] know how the equipment works on the inside, which sometimes makes it harder to troubleshoot if a problem arises. Leaving the course with this knowledge will be invaluable for my Marines and me in the future.”

Dave Wood, the president of the Brightleaf Amateur Radio Club and instructor of the course, plans to conduct the first expert level course in the future after enough Marines have graduated from the intermediate course. The club plans to host the next entry level course during the summer of 2020 and train more Marines.

“The volunteers who make up our High Frequency Auxiliary are absolutely vital to us building a world-class capability,” Walzer said. “We’re drastically improving our skill by pairing experts with Marines who have a passion for HAM radio. They may not wear the uniform, but they’re American patriots serving our country in a different way.”

Whether the next conflict is fought in air, on land, at sea, or in space, one thing is clear; Marines will adapt to face those threats whether it is with the technology of today or equipment of the past.[]

Oakland Athletics off the radio waves in the Bay Area, commit to A’s Cast stream (The Mercury News)

The Oakland Athletics will not broadcast games over radio

The Oakland Athletics, who have led a nomadic existence on the Bay Area airwaves, pulled the plug on radio Tuesday, announcing that games will be available only online.

The A’s could have returned to KTRB, the station they teamed with just before the start of last season after an ugly split with 95.7 The Game, but instead chose to expand their use of a streaming service called TuneIn. The team launched A’s Cast on the service last season

Though the method of delivery is different, the voices are not. Ken Korach will return for his 25th season in the broadcast booth alongside Vince Cotroneo. (The team will continue to carry Spanish-language broadcasts on KIQI AND KATD.)

“There’s going to be some frustration because it’s something new,” said Cotroneo, who will mark his 15th season with the A’s. “It involves an education, downloading, and an additional step in what they are accustomed to basically their entire lives. Hopefully, it’s not difficult to get the product.”

The A’s say they are betting on a more tech-savvy generation. They planned to pursue an all-digital approach last season before the KTRB deal emerged . KTRB was the team’s 12th radio home since its arrival in 1968, and the fifth since 2000.[]


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Help Brian identify this 1970s era interval signal

[Mystery solved! Click here to read the update.]

Many thanks to SWLing Post contributor, Brian (W9IND), who writes:

I want to thank you for stirring a memory that I never thought I’d relive – even though it still doesn’t solve the mystery of what the heck I was listening to in the first place!

Back in the early 1970s, I was a teenage SWLer with a curiosity for the worldwide signals that emanated from the speaker of my shortwave radio. Bitten by the SWLing bug after stumbling across Radio Nederland’s Bonaire relay station, I spent many a happy hour twirling the dial in search of fresh game to hear and QSL.

But on one such occasion (I’m going to guess it was in 1971), I was surprised and fascinated by what sounded like a snake-charming horn playing notes at random. Stranger still, the transmission would seemingly go off the air for a couple of seconds and then return to play the strange melody again. I chalked it up to one of the countless beeps, hums and other electronic noises that often appeared on utility frequencies in those days.

I never recorded it, I never had a clue what it was, and I never heard it again.

Until recently. On the Shortwave Radio Audio Archive.

A couple of weeks ago, while looking for old shortwave interval signals from the 1970s, I saw a recording marked “Unidentified interval signal 1” listed right after the interval signals of Deutsche Welle and Radio Nederland.

“OK,” I thought. “Sounds like a challenge. Maybe I can even help figure out what it was.”

Then it played … and I almost fell off my chair! I literally sat with my mouth open as the long-lost sounds of the “snake-charming horn” played again. Could it indeed have been an interval signal – and if so, for what station?

I wanted to contact the person who recorded it, but then I learned the sad news that Mr. Greg Shoom is no longer with us.

So I remain mystified, probably forever. But it sure was fun hearing that weird recording again! Thanks for the memories.

Let’s see if an SWLing Post reader can help, Brian!

I know of at least a dozen readers who are experts on all that is interval signals, so hopefully someone can listen and ID this one.

I’ve embedded audio from this SRAA recording below. Note that the unidentified interval signal can be heard between time marks 1:27 – 2:07 in the following recording:

Can you positively ID this interval signal?  If so, please comment!


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Guy’s mind blown when he stumbles upon WBCQ’s Ampegon antenna

(Source: Ampegon)

Many thanks to SWLing Post contributor, Dan Van Hoy, who shares a link to this YouTuber who stumbled upon shortwave station, WBCQ, while driving through rural Maine in 2018. He obviously didn’t understand what the site was at the time–nor the fact that the owner loves collecting vintage equipment.

The video gives the impression of WBCQ being a place of mystery and intrigue. If he only knew that he would have likely been welcomed with open arms and gotten a detailed tour had he only contacted the station!

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