Tag Archives: Shortwave Radio

Radio Waves: State of AM Radio, Quindar Tones Hack, AI DJs, BBC Pop-Up Station for Sudan, Artemis II & Ham Radio, and a Morse Revival

Source: NASA

Radio Waves:  Stories Making Waves in the World of Radio

Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Dennis Dura, David Shannon, and Eric McFadden for the following tips:


Bouvard Laments “Yawning Gap” in Marketer Perceptions About Radio (Radio World)

Cumulus publishes analysis to counter prevailing sentiments about AM and radio in general

“Ford owners are massive users of AM radio.”

So writes Pierre Bouvard, chief insights office of Cumulus Media, citing data from MRI Simmons.

That is but one of his observations as Cumulus Media/Westwood One released an analysis of listening data from sources that also include the Nielsen fall 2022 survey, Edison Research’s “Share of Ear” and research by Advertiser Perceptions.

Bouvard regularly posts about the power of radio and what he calls misperceptions about the medium among the broader marketing community.

He summarized takeaways from the new Cumulus analysis:

“The Nielsen Fall 2022 survey reveals that 82,346,800 Americans listen to AM radio monthly; 57% of the AM radio audience listens to news/talk stations, the very outlets that Americans turn to in times of crisis and breaking local news; and one out of three American AM/FM radio listeners are reached monthly by AM radio,” he wrote. [Continue reading…]

AM News Radio, your go-to in a crisis, could itself be in trouble (NorthJersey.com)

“Some clouds over the city right now. I’m Paul Murnane,” says a familiar voice.

“I’m Wayne Cabot,” says another.

Few would know their faces. But as names, they’re as recognizable as anyone in New York.

Fewer still could tell you their address — an 11th floor studio in a light-brick high-rise in lower Manhattan, between a Chase bank branch and patisserie named Maman.

But hundreds of thousands know where to find them on the AM dial — right between 820 WNYC (“public affairs”) and 930 WPAT (“multi-ethnic”). That, for 56 years, has been the location of WCBS Newsradio 880 — one of those rare unchanging institutions in a changeable city. [Continue reading…]

Apollo Comms Part 27: Quindar Tones Microphone Hack (CuriousMarc on YouTube)

The last DJ nears? Radio station uses artificial intelligence, cloned voices (WRAL)

GENEVA — The voices sound like well-known personalities, the music features trendy dance beats and hip-hop syncopations, and the jokes and laughter are contagious. But listeners of an offbeat Swiss public radio station repeatedly got the message on Thursday: Today’s programming is brought to you by Artificial Intelligence.

Three months in the making, the French-language station Couleur 3 (Color 3) is touting a one-day experiment using cloned voices of five real, human presenters — in what managers claim is a world first — and never-aired-before music composed almost entirely by computers, not people. From 6 a.m. to 7 p.m., the station said, AI controlled its airwaves. Every 20 minutes, listeners got a reminder. Continue reading

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RF75A Radio

Raddy RF75A Review – Pocket Radio with Interesting Bells and Whistles

Radioddity Raddy RF75A

By Robert Gulley K4PKM

The RF75A is an interesting little radio which (currently) retails on Amazon for ~$53.00 in the States. It can also be purchased via Radioddity directly for $53–if you use this referral code, you can save $15 off a $65 purchase.

Before we get into specifics, two things are worth mentioning right off:

  1. I was asked if I would be interested in reviewing this radio by our fearless shortwave listening leader, Thomas, and the copy I have was provided to me at no cost by Radioddity directly. (I have no other affiliation with them, but have recently purchased a GMRS mobile radio from them which I am looking forward to using when I finish my review of the RF75A.)
  2. This is, as you will see from the photos I am including, a pocket radio, not to be confused with a tabletop radio or a small portable radio such as the CCRadio Skywave or similar radio. I mention this because invariably there will be folks who expect tabletop or portable quality from a radio about the size of a playing card. It is not going to happen!

Having those thoughts out of the way, the quick and dirty answer as to the quality of the radio is, I am impressed. For those who have not read anything related to my past experience with radios, I have been a shortwave listener since I was about 10 years old, and now in my early sixties. So, I have seen a fair number of radios in my time (speaking as an old codger, or is that curmudgeon?) and have even moved with the times to incorporate SDRs into my radio arsenal.

Each style of radio has its place, and a pocket radio is designed to be the ultimate in portability and space savings. As light as this shirt pocket radio is, it still manages to feel reasonably solid, and of course, it could be packed into anything one was taking along for a trip.

Size Comparison with Playing Card and Cell Phone Battery

The radio measures 2.5″ x 3.5″ x 1″. Playing card and cell phone battery for comparison.

Here are some specs from the manufacturer’s website (saving you my long-winded descriptions!):

  • APP Control SW Radio: Thanks to the app intelligent remote control and Bluetooth 5.0 features, you can enjoy the convenience of RF75A. With its intuitive user interface and powerful wireless capabilities, you can easily control your radio from your devices (support iOS, Android, and HarmonyOS systems).
  • Wider Reception Range: Listen to FM, VHF, AM, SW, and WB, and stay up-to-date with your favorite radio shows and music with this powerful multi-band receiver. RF75A has a wider range of shortwave frequencies compared to the RF750.
  • Automatic Scan and Manual Storage: You can save up to 396 stations, so you can easily access your favorite stations. Experience powerful sound and crystal-clear reception with its 9.85′ wire antenna.
  • Personal Music Player: Boost your music experience with this all-in-one outdoor audio system. With Bluetooth 5.0 feature, a 3.5mm earphone socket, and a TF card socket, you can easily connect to your personal audio devices and connect to your computer as a speaker.
  • Outdoor Companion: This one-of-a-kind radio is designed to be small and lightweight, making it ideal for travel and outdoor activities. Use the flashlight and SOS for emergencies.

What’s in the box?

  • 1 x Raddy RF75A
  • 1 x Storage bag
  • 1 x Lanyard
  • 1 x Wire antenna
  • 1 x Type-C charging cable
  • 1 x Earphone

Reception

I always like to start a radio review by either listening to AM stations first, or WWV time stations for checking out shortwave reception. In this instance I started listening to AM stations in the daytime to see what I could hear on a typical day (no storms nearby, early spring, etc.).

Living in a fairly remote area I was surprised it captured as many stations as it did, making me think the ferrite bar inside must designed well for such a small radio. Evening and nighttime listening brought in many of the usual stations with which we are familiar, particularly the so-called Clear Channel stations. What was more impressive were the many small stations I was able to pick up, not only at night, but early in the morning around 8 a.m.

Ferrite Bar- Front View

Surprisingly effective Ferrite Bar

Ferrite Bar Side view

Side vide showing the magnetic wire wrap

One in particular caught my attention as I am quite certain I have never captured them before, was WHKY 1290, Hickory North Carolina. That’s a distance of about 285 miles, received in the morning. I am only about 50 miles from Cincinnati and cannot receive some of their smaller stations on any radio! Color me impressed!

Nighttime brought stations in from several thousand miles, as you would expect, yet I was likewise impressed with this little radio’s capabilities on AM.

FM

I confess to not being much of an FM listener, but I did tune around the band for FM stations to test its ability to “lock on” to signals (as indicated by a tiny red light) and to pick up stations from quite a good distance away with clarity and good sound.

This might be a good time to mention the quality of sound from the small 3 Watt(!) speaker and bass boost from the back. Again, this is not my Sangean 909 X2 with a large speaker, nor my CC Radio EP, but it has rather amazing clarity and volume capability for such a small radio. I cranked the volume up quite high with no distortion, and even though the speaker is small, the bass boost seems to round out the sound quite nicely, avoiding some of tinny sounding speakers common in such a small radio.

Weather

The radio has coverage of the NOAA weather radio stations and it surprised me with being able to receive 4-5 stations, more than I have gotten with most other radios. All but one of the signals were crystal clear, with the fifth having some noise, but still quite intelligible.

Air Band

This radio includes the air band frequencies and amateur 2-meter frequencies (30.000-199.975 MHZ). I am usually able to receive some signals, but I am quite far away from any local airports or repeaters, so my main reception is from CVG, Greater Cincinnati Airport. While the radio scans the air band frequencies, like any other radio, it is best to find local frequencies you want to hear and program them into memory so you are not wasting a lot of time scanning dead air (these are country specific). Likewise amateur repeaters or GMRS, marine, or public service channels would be best used in memory channels except when scanning for new frequencies.

SWL

Shortwave listening is very respectable, with frequency ranges between 4.750-21.850 MHz (it does not have SSB capability). Tuning can be accomplished by pressing and holding one of the directional tuning keys for about 2 seconds, a long press scans faster. A single press of either directional button will move the frequency increment based on the band/mode chosen.

The radio also features something I have come to really like: a pause button which works not only in music mode, but also when receiving regular radio signals, activated by a quick press of the power button. The frequency is held while pause is active, and then releasing the pause with a second quick press of the power button resumes with all your setting still active.

When comparing this with another radio it was particularly useful instead of having to turn the volume down like most radios. This feature is also nice for answering a call or other interruption, and you resume right where you left off.

Sound Effects, TF Card, Audio in, Bluetooth Usage and other Errata

I have not covered these features as they do not impact radio reception, but I mention them just for completeness. All of these features are available and can be read about in the user’s manual. I will mention the flashlight feature and the emergency siren features, as these are useful for portable operation. The light is quite bright, and the siren will hurt your ears if you trip it accidentally, especially more than once. Ask me how I know!

There is a sleep timer as well as an alarm clock function, with the sleep timer adjustable by default starting at 90 minutes. Most buttons have multiple functions depending on the mode employed, so reading the manual is important for some of these features. I was able to get up and running without reading the manual initially, but some features were functional only in certain modes, so eventually you will need the manual which can be downloaded from the Radioddity site.

The App

A bit of a novelty in this size and type of radio is the Apple/Android app available to control radio functions remotely through Bluetooth connectivity. I have to say, on Android at least, the app is beautiful and I wish more apps used such a clear color scheme and large controls. Your mileage may vary based on your preferences, but I like it!

Phone App on Android

The free Phone app on an Android phone. I like the crisp, clear layout and colors, and the intuitive design.

As to function, the app gives you more information than the radio screen, such as the Bandwidth, SNR, received signal strength and the volume setting in one display. As a side note, the radio can still be adjusted at the radio, and then changes are reflected in the app almost instantaneously.

Of course, the main use for the app is to operate remotely, and the controls are easy to use, including, most importantly, direct keyboard entry of frequencies! This is always the biggest drawback to small radios without a keypad. There are instructions for using the app, but for the most part the app is laid out so well you can control the radio pretty much intuitively.

Negatives –

Yep, there are a few. When tuning with a single press each time there is some soft muting – fortunately it does not last long, but it is there. The buttons also make a clicking sound, not too loud, but it is there. If something like that annoys you, be aware all the buttons make a mechanical click.

I have noticed on several occasions that the band/mode button may stick slightly and take you past where you want to go. Not a big problem, but it does happen now and again. Of course, this could just be my unit.

Also, naturally, the buttons are small. And while I did not have much of an issue even with fairly large fingers, there were times when I pressed the desired button but also hit the one below it. Not a problem for me, but again, if you have very large fingers you may find the radio a bit tricky to navigate in some places. (This only happened on the front buttons for me, the tuning buttons are adequately spaced for most anyone I think.)

The telescoping antenna is probably the weakest point on the radio – similar to most radios, really. It is thin and could be bent easily. I had no difficulties, but I always took care to raise it gently and watched where I was moving the radio around. Then again, I do that will all my radios with telescoping antennas. Just a heads-up to be careful.

Concluding Thoughts

I like this little radio, and will probably keep it in my car for those times when I might want to listen to the radio out and about, check the NOAA weather forecast, use the flashlight, or (hopefully never need) to use the siren. The battery seems to last a long time on a charge when using the radio – I cannot speak to the MP3 drain or a prolonged flashlight/siren drain, but under normal use it seems excellent. It uses a USB-C connection like my phone, so charging is not an issue for me. It will almost fully charge in an hour; the instructions say 2 hours.

Pocket radios certainly have their niche, and I think this one does quite well in that role. If you are in the market for such a radio, I think you will be pleased, especially for the price and the addition of the free remote-control app. 73!

Click here to check out the Raddy RF75A at Radioddity.

Click here to check it out on Amazon.com (affiliate link).

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Alan Roe’s A23 season guide to music on shortwave (version 1.1)

Many thanks to SWLing Post contributor, Alan Roe, who shares his A-23 (version 1.1) season guide to music on shortwave. Alan provides this amazing resource as a free PDF download:

Click here to download Music on Shortwave A-23 v1.1 (PDF)

Thank you for sharing your excellent guide, Alan!

This dedicated page will always have the latest version of Alan’s guide available for download.

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Off-Air Recording: Can you help Pete ID this broadcast?

Many thanks to SWLing Post contributor, Pete Jernakoff, who writes:

Last Saturday evening, I was cruising through the SW bands and came across music and talk on 2640 kHz, a rather odd (I would think) frequency on which to find such a broadcast format.

The music was of the soft pop variety (for example “Vou de Taxi” by Angelica; “A Time For Us – Love Theme from Romeo and Juliet” by Jack Jones; “A Lua E Eu” by Cassiano), and it sounded to my ears that the on-air talent (male) was speaking (between songs) either in Portuguese or in a Brazilian dialect of said language.

I have attached an audio clip of this broadcast [see below] which begins at 0158 UTC (on 26-March-2023). The recording is a little over 13-minutes long and ends when the signal abruptly leaves the air.

Note that there is a seeming mention in the recording of the words ‘Brazil’ and ‘Brasilia’ at the 4:40 and 5:03 time points, respectively. I have no clue where this signal originated, and I’m hoping that you or one of your many readers might be able to help ID this one. As far as I’m aware, there is no station that broadcasts on this frequency at least with this kind of programming. The signal seemed too strong to be a harmonic of a station broadcasting on, say, 1320 kHz. Perhaps a pirate? A mystery to me…

Thanks for sharing this recording, Pete! 

If you can help Pete ID this mystery recording, please comment!

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Guest Post: Listening to LRA 36

Many thanks to SWLing Post contributor, TomL, who shares the following guest post:


Listening to LRA 36

by TomL

I finally had time to go outdoors to listen to LRA 36, Antarctica.  People were gushing about how well it is being received.  My location was a park across the street from the Forest Preserve I usually go to (the Forest Preserves are shutdown and gates locked after sundown).  Even though it was after sunset, this Park has no gate or chain to prevent people from parking there.  In the dark, I setup the trusty amplified Loop-on-Ground antenna, SDR, and laptop.  Solar Flux Index about 179, K index 2.

Started recording and, NOTHING! ARRGH.  But I had just heard it at home in the noise!?!?  Waited about two minutes and all of a sudden music started playing in the middle of a song.  S6 – S7 strength with lots of fading.  Very cool.  20 minutes later, went off the air.  Then 10 minutes later, came back on again in the middle of another song.  They must be tweaking the transmitter.  This feels like the 10 kW transmitter; no way could a 1.5 kW be this loud over 12000 kilometers!  Also, an advantage with IQ recording of a spectrum is I could tune into it later.  Good thing because between their tweaking the transmitter, my SDR, and the crazy propagation, I had to tune to 15475.983 kHz in order to get the USB signal perfectly in pitch.

For your listening enjoyment if you have not had a chance to hear it clearly, I have uploaded both recordings to archive.org where you can listen as long as you want.  Worth listening to, playing music of Argentina music bands.  Happy Listening!  Here is the link to Archive.org and the audio files are also embedded below:

LRA 36 at 00:30 UTC on 05 March 2023:

LRA 36 at 01:00 UTC on 05 March 2023:

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LRA 36 (Arcangel San Gabriel, Antarctica) Test Broadcasts on March 1st and 4th, 2023

Many thanks to SWLing Post contributor, Adrian Korol, who shares the following details for the next two LRA 36 test broadcasts. Note that the first one is later today (Wed, Mar 1):

LRA 36 Radio Nacional Arcangel San Gabriel.
Next Test Broadcast from Antartica:

      • Wednesday March 1st, 21:00 to 23:00 UTC
      • Saturday March 4th 21:00 to Sunday, March 5th 03:00 UTC

Frequency/Mode: 15476 kHz USB

Correct Reports = eQSL
email : [email protected]

Please upload your LRA36 listening video to YouTube, IG, Twitter, FB, or Tik Tok.

Thank you for the tip and photos, Adrian!

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Bob Zanotti’s presentation to the Fairlawn Amateur Radio Club (Part 2)

Many thanks to SWLing Post contributor, Bob Zanotti (HB9ASQ), who has, at my request, shared a video recording of a presentation he gave to the Fairlawn ARC last year.

This is part two. If you missed part one, you can view it by clicking here. Thank you, Bob! Enjoy:

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