Giuseppe’s latest homemade ferrite antenna for MW and SW

Many thanks to SWLing Post contributor, Giuseppe Morlè (IZ0GZW), who writes:

Dear friends,

I’m Giuseppe Morlè from Formia, central Italy on the Tyrrhenian Sea.

I want to share with you my latest ferrite antenna for listening; it is composed of 3 ferrites of 20 cm each in a tube for electrical systems with 2 separate windings, one for medium waves and one for short waves, 40 turns for medium waves, 4 turns for short waves. I use a 750 pf variable to tune the 2 windings and a switch is used to eliminate a winding.  Since there is only one variable, if you listen to the medium waves I interrupt the winding of the shorts.

On shortwaves it is preferable to place the system on an iron railing which, due to inductive effect, behaves like a really long wire antenna.

For the mediumwaves it is enough to bring the receiver close to the ferrites and also in this case, the induction will have its effect with an excellent increase in signal and modulation.

The range of this portable antenna is:

      • 520 to 1800 kHz
      • 3.500 to 18.000 MHz

Here’s a video from my Youtube channel where I explain how it works:

I had previously built a similar antenna but with 12 cm ferrites–very portable.

Thank you for your attention and I wish you good listening.

73. Giuseppe Morlè iz0gzw.

This is brilliant, Giuseppe! I love how you never stop building and experimenting with various antenna designs! Thank you for sharing this with us!

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New and Special Programs From Radio Angela


Bill Tilford, Curator of Radio Angela (WBCQ 5130 kHz) writes:
This week, Radio Angela (WBCQ 5130 kHz) has the following special broadcasts:

Thursday, June 30 0200-0300 UTC (Wed 10pm-11 EDT):  WBCQ Open Mic
This edition of WBCQ’s occasional “Week 5” broadcast includes a blues band from Argentina, Indonesian Dangdut (pop) submitted by a listener in Greece and other surprises.
Thursday, June 30 0300-0400 UTC (Wed 11pm-Midnight EDT):  WBCQ Polka Party
In this special broadcast, Marion and Kristina of Marion’s Attic present a rollicking polka party that includes music from a current polka star along with some great vintage recordings.
Friday July 1 0300-0400 UTC (Thurs 11pm-Midnight EDT):  WBCQ Comedy Ration
Who couldn’t use a laugh about now?

On Saturday, July 2 from 0200-0300 UTC (Fri 10pm-11pm EDT), two new weeklies begin:
Saturday 0200-0230 (Fri 10pm-10:30 EDT): Orwellian Airwaves With Lainie Petersen
Lainie, an arts and public affairs producer and commentator on World Perspectives Radio and Hard Lens Media, reads from Orwell’s works.  1984 begins this Friday.
Saturday 0230-0300 (Fri 10:30pm-11:00 EDT): Greek Music Refuge
Having decided that a shortwave spectrum without any Greek music in it is unacceptable, Bill Tilford presents a balm from his own impressive collection until something better comes onto the airwaves. 

 

 

 

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FM World reports that RAI will end mediumwave broadcasts later this year

Many thanks to SWLing Post contributor, Pedro Andrade, who shares the following article. Note that the following excerpt has been translated by Google from Italian to English. Click here for the original in Italian at FM-World.it:

On 11 September 2022 Rai radio broadcasts in medium wave will cease (FM World)

Before the end of the summer, Rai will end radio broadcasts in medium wave .

[…]The news, already anticipated in recent months by sector magazines such as Italradio , is made known by the Easy Web section of Rai .

Everything comes from the audio description for the blind, available for some programs in the second audio track of the TV channel concerned, but also in medium wave on Rai Radio1 .

With regard to this latter service, the site (accessible by clicking HERE) specifies that “from 11 September 2022, due to the termination of Rai radio broadcasts in medium wave modulation, the audio descriptions of television programs for the blind will be available only on dedicated audio of digital terrestrial television.

The regular Rai radio programs , therefore, will continue in FM , DAB + , web and app .

Thanks for the tip, Pedro.

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Voice of Korea via Digital Radio Mondiale (DRM)?

Many thanks to SWLing Post contributor, Paul Jamet, who writes:

Hi Thomas,

Several listeners have posted videos on YouTube about receiving broadcasts of “The Voice of Korea” on 6140 kHz DRM – Digital Radio Mondiale.

One video in particular caught my attention, from Indian listeners in the Kerala region:

Indeed, these headphones use a Chinese receiver, the G-226 from GOSPELL which is also sold by TECSUN in Australia: https://www.tecsunradios.com.au/store/product/tecsun-drm-radio/

So, you can see how this receiver works.

All this has aroused my curiosity! And yesterday, Friday 17 June 2022, at 20:00 UTC I connected to several kiwi SDRs in the Pacific area. The DRKP signal could be picked up almost 8,000 km from the transmitter site near Pyong-Yang.

Here attached a screenshot and an audio file recorded with a kiwi SDR located a few kilometres away near Perth, Australia – Distance according to Google Maps, about 7960 km

The signal is encoded in AAC and not xHE AAC

[Audio: Note that the audio level jumps several times, so don’t turn up the volume too high.]

Who is this program for? According to Indian radio listeners, probably to the North Korean fleet in the Pacific. To be continued.

Have a nice weekend. Yours sincerely

Paul JAMET

I would have never guessed VOK would broadcast in DRM. Very interesting indeed. Perhaps we’ll learn more about this with time or someone can confirm whether or not this is actually VOK. Thank you for sharing this, Paul!

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RTI Transmission Test from Tamsui on Saturday, July 2, 2022

Many thanks to SWLing Post contributor, David Iurescia (LW4DAF), who shares the following notice from RTI’s French language service. Note that the following article was translated into English by Google. Click here for the version français.

Direct broadcast from RTI’s Tamsui station

This year, the French service offers direct broadcasting from RTI’s Tamsui station to France and Europe.

Frequency and times of the test phase

A test broadcast will take place on four different frequencies on Saturday, July 2, in 10-minute increments, as follows:

-Frequency 11995 kHz (Angle 325 degrees)?17:00-17:10 UT and 17:30-17:40 UT.

-Frequency 9545 kHz (Angle 315 degrees)?19:00-19:10 UT.

-Frequency 7240 kHz (Angle 315 degrees)?19:20-19:30 UT.

-Frequency 7250 kHz (Angle 315 degrees)?19:40-19:50 UT

Depending on the results obtained and your feedback on these broadcast frequencies, the two best results will be selected for the direct broadcast in August.

Live Stream Schedules

Every Friday, Saturday and Sunday in August, at 5:00 p.m.-6:00 p.m. UT and 7:00-8:00 p.m. UT.

A special QSL card is being printed for any listening reports received as part of this summer 2022 direct broadcast from the French service (test phase and official broadcast). Thank you for your support!

The direct broadcast of the German service will take place in July (test phase on June 25).

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Jack’s “Perfect Radio Trifecta”

Many thanks to SWLing Post contributor, Jack Kratoville, for the following guest post:


My Perfect Radio Trifecta

by Jack Kratoville

Last Fall, I asked SWLing readers to assist me in my decision as to what portable radio I should take on a two-week trip to Germany. While I came up with an initial list of portables I already own, there were some excellent suggestions on what I might pack. (Sidenote to Thomas – yes, my wife and I packed everything we needed into two carry-on pieces, including my 3 radios. Your expertise continues to serve us well!) To all else, thank you again for your thoughts, suggestions and comments.

The Tecsun PL-310ET was a top choice of many, yet one I had previously never taken into the field. It seemed a logical choice for this trip. The second is the Sangean PL-210 and it just fits in any pocket. The third is a DAB receiver someone had given me, tossed in a drawer, and forgotten about until I realized Germany implemented DAB to replace the MW and LW bands. The only name I can find online is the DAB-8. Being quite small, it made the cut and I shoved it in between a couple of tee shirts.

At our destination, I quickly realized I could not have chosen a better trinity for myself. Here’s why.

Tecsun PL-310ET

If this had been the only radio I brought, I would have been more than satisfied. SW signals abound (the war just two countries away was certainly a factor.) A quick hit of the ETM feature at the top of the hour brought in 40-50 listenable signals, with only a scant few broadcasts religious in nature. Even during the day, I could capture 25 easily. With the bandwidth set at 3 kHz, sound was most impressive. While some were the same broadcast on different frequencies, my only real disappointment was the lack of English-speaking broadcasts – but that was to be expected. The PL-310ET scans relatively fast and holds on to strong signals quite nicely.

We stayed with relatives who lived high on a hill not far from Kiel, in the north of Germany. One push of the ETM feature on FM filled the dial with German voices playing mostly English pop music (the eighties apparently a favorite decade there too.) Simply put, the selectivity on this radio is phenomenal. Odd / even frequencies happily sharing adjacent homes on the dial. And with the pre-emphasis on European FM at 50, the sound from this portable was absolute perfection. As a matter of fact, my first complaint about this radio was a bit of harshness on our over-processed FM commercial stations. In Europe, the audio characteristics of classical, pop, rock and talk stations was simply sweet.

My first night on the AM band was a disappointment. One, maybe two signals that didn’t come in very well. Thankfully, I quickly remembered to flip it to 9kHz and – wow! The BBC, Spanish, Italian, and signals that sounded very much like eastern Europe came booming in. I did not expect all of this and can easily say this was the most fun I’ve had band scanning and DXing in a long, long time! Traveling domestically, I’m more apt to load a memory page, but in this situation, the ETM feature was incredibly useful.

For all DXing, I only used the whip and internal antennas. The battery indicator dropped one notch on the second to the last day we were there. The PL-310ET is an absolute true travel performer.

The Tecsun PL-310ET now sits proudly alongside my CCrane Skywave, Digitech AR1780, Eton Executive Satellit (Grundig edition) and the semi-retired Grundig G5. When we travel to London next year, there’s no question this gets packed again.

Sangean PL-210

A radio that became my constant walking companion during Covid. Hand-sized with a really nice on-board speaker for its size. The sensitivity is impressive and considering its PLL circuitry, has excellent selectivity on FM. AM was also impressive for an antenna no more than a half-inch – if that. It went with me to Hamburg, Berlin, Frankfort and Denmark; always just a quick pull from the pocket for a quick scan. To say I like this radio, well, I own three.

DAB-8

My curiosity in DAB was basically zero. One reader actually PM’d me and offered their own DAB receiver, saying I should check it out. (Thank you, Mike, for that generous offer.) This radio sounds great, but has very poor FM reception. (No MW). It does have inputs for mp3 and Bluetooth, so I figured just in case there was nothing to listen to, I could stream something on it. Its small size was the biggest factor in making the trip. Once settled, a quick daytime scan grabbed nine signals easily on DAB and they sounded great. It was the only band that featured more traditional (even country!) music. It’s back in the drawer at home, but I am very glad it made the trip.

Summary

I truly had a blast listening to the various captures on these three radios, the Tecsun being the most impressive and fun. I’m sure many newer models would be excellent choices, but not once did I wish to have something bigger or better. That doesn’t happen on trips very often, so perfection indeed.

My apologies to those looking / hoping for recordings. I stopped recording from the radio back when I opted to purchase 45rpm records rather than record them, complete with DJ patter on my father’s Webcor reel-to-reel. Once I got into the biz, I recorded enough DJ patter to last a lifetime! Again, thanks to everyone for their input.

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Microtelecom introduces the Perseus 22 four channel wideband SDR

Microtelecom has just announced their latest SDR receiver: the Perseus22. 

INTRODUCING NEXT-GEN SDR RECEIVER

Perseus22 is a 4 channels, direct sampling receiver with a continuous frequency coverage from 10 KHz to 225 MHz and a typical image rejection larger than 70 dB.

All channels are synchronously sampled by an high SNR, 14 bits A/D converter and processed by a software defined digital down converter, implemented on an FPGA, which outputs are routed to the host PC by a USB 3.0 controller, allowing wide-bandwidth IF applications.
The frequency coverage is split-up in 2 groups of channels (two for VLF-HF frequency range, the others for VHF), each one capable of diversity, which can reduce noise in order of tens dB. All channels includes an analog RF frontend equipped with attenuators, preselection filters and amplifiers.

The receiver enclosure is machined from solid aluminium and finished with a fine, non reflecting, black surface treatment.

I’ve no other details at present, but I’m eager to learn about pricing and availability.

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