Category Archives: Mediumwave

Inaugural DX Central MW Daytime Challenge starts today!

Many thanks to SWLing Post contributor Loyd Van Horn at DX Central who shares the following announcement:


The Inaugural DX Central MW Daytime Challenge

What a great season of DX Central Live! and the MW Frequency Challenge it has already been and we are just getting started! This season, you helped us cross 1,000 subscribers on our YouTube channel, have brought in a record number of MW Frequency Challenge submissions thus far, and have helped to generate a lot of energy around this DX season! We couldn’t do it without your support, so thank you!

First, a little housekeeping. We will be taking some time off to spend the holidays with family and of course – some DX! As such, there will be no DX Central Live! on Friday, December 23 or 30th. We will return on Friday, January 6, 2023.

Also during this time, we will be taking a brief pause on our weekly MW Frequency Challenge as well. I will be announcing the results from week 12 (576-600) when we return on Jan 6, as well as the next frequency range at that time.

Don’t worry, we have a challenge for our little break that should provide all of the fun and difficulty to push DXers to scratch new ones in their logbooks: The Inaugural DX Central MW Daytime Challenge.

The premise: Log as many stations as you can during daytime conditions. That’s it!

Nothing but daytime DX (period from 2 hours after local sunrise to 2 hours prior to local sunset) starting at 0200 UTC Saturday, December 17 and ending at 0200 UTC Monday, January 2, 2023. This challenge is open to all DXers around the world!

A few rules:
– Loggings must be during your local daytime period (2 hours after local sunrise to 2 hours prior to local sunset)
– Loggings must be from between 0200 UTC Saturday, December 17th and 0200 UTC Monday, January 6.
– Any stations are allowed for this challenge: local stations, TIS/HAR, part 15 transmitters not to mention anything distant you might be able to pull in!
– Stations do not need to be “new to you”, relogs are allowed
– Stations need to be on any mediumwave frequency between 530-1710 kHz.
– Loggings should be from a location within 50 miles of your home location. This includes use of online SDRs, portable operations, etc.
– If you are traveling for the holidays and will be away from home but have access to either your station remotely or another online SDR from your home location, those submissions will be allowed.
– Only submissions made using the Google Form sheet (link below) will be considered for the challenge. Social media posts, emails, etc will not count.

Categories for this challenge will include US and international versions of:
– Most stations logged
– Most US States/Canadian Prov logged
– Most countries logged
– Furthest reception
– Most frequencies with at least one logged station

Google Form for entries: https://forms.gle/TVgCPrHMpfDAzbzb6

I hope this challenge will be a fun one for all!

To all of our fellow DXers, supporters, family, friends….Merry Christmas, Happy Holidays and may your logbooks be filled with DX and your hearts filled with joy and love!

73,

Loyd Van Horn
W4LVH – Mandeville, LA

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Making a good thing better: The C.Crane CC Skywave SSB 2

Last month, C.Crane sent me (and the infamous Jock Elliott–read his review here) a pre-production CC Skywave SSB 2 portable shortwave radio.

In full disclosure and to be clear: these pre-production units were sent to us free of charge by C.Crane who is a long-time sponsor of the SWLing Post.

Back in October, I was very pleased to see that C.Crane had updated the CC Skywave SSB to version 2 in their latest product catalog.

If you’ve read the SWLing Post for long, you’ll know that the CC Skywave SSB is my choice travel and EDC radio. I prefer it over any other portable I own (and I do have quite a lot) because it’s so insanely useful, efficient, lightweight, compact, and durable.

I’ve taken the CC Skywave SSB and the original CC Skywave on more travels that I could possibly remember.

What’s so great about the Skywave series?

I’m a one-bag traveler.

Me, at Charlotte-Douglas International waiting for a flight to the Winter SWL Fest in 2019.

When I fly, I take only one carry on bag that’s so compact it can fit under the seat in front of me in any type of commercial aircraft.

I firmly believe there is no freedom like one-bag travel. While others are stressing over where to stow luggage, how to carry it all, or why their checked-in luggage didn’t arrive at the destination, I’m cruising through the airport and to my destination unhindered.

The key to successful one-bag travel is only carrying what you need, and focusing on items that are multi-function.

Me? I need a good multi-band radio.

The CC Skywave SSB is the most comprehensive compact portable I own. It’s truly a “Swiss Army Knife” of a receiver. Here are the bands/features I appreciate:

  • AM/Mediumwave (9/10 kHz steps selectable)
  • FM broadcast (with expanded FM range when in 9 kHz step mode)
  • Shortwave
  • AIR band (to listen to Air Traffic Control and Air comms)
  • Weather Radio with alert (this functions brilliantly in the US and Canada)
  • A proper clock and alarm (that can display in 24 hour time!)
  • It uses two common AA batteries that can even be internally-recharged if NiMH
  • It even has a squelch feature for scanning, say, the AIR band

All of this and it’s also one of the best-performing compact radios on the market. It’s a capable radio for portable DXing right out of the box (or you can hot-rod it like Gary DeBock does!).

Side note: the CC Skywave’s weather radio reception is better that any other radio I’ve tested including dedicated weather radios. Continue reading

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Online-Only: BBC prepares to shut down radio and TV broadcast over next decade

(Source: The Guardian via Mark Fahey)

BBC preparing to go online-only over next decade, says director general

Tim Davie outlines vision for a world of ‘infinite choice’ where broadcast TV and radio are being switched off

The BBC is preparing to shut down its traditional television and radio broadcasts as it becomes an online-only service over the next decade, according to the director general, Tim Davie.

“Imagine a world that is internet-only, where broadcast TV and radio are being switched off and choice is infinite,” he said. “A switch-off of broadcast will and should happen over time, and we should be active in planning for it.”

Davie said the BBC was committed to live broadcasting but Britons should prepare for the closure of many standalone channels and radio stations by the 2030s: “Over time this will mean fewer linear broadcast services and a more tailored joined-up online offer.”

The future will involve “bringing the BBC together in a single offer”, possibly in the form of one app combining everything from television programmes to local news coverage and educational material. This could ultimately see the end of distinct brands such as BBC One or BBC Radio 4, although the programmes they currently air could continue online. [Continue reading at The Guardian…]

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Tom’s Recommendations: Earbuds and EQ Settings for Shortwave Listening

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


Earbuds for Shortwave Listening

by TomL

A few years ago I had bought the discontinued Sennheiser MM 50 earbuds for a cheap price on Amazon to use in my various radios.  The portable radios in particular can use more fidelity because of their small, raspy speakers.  I also like to listen without bothering others around me who might not want to listen.  And earbuds are a LOT more comfortable for my ear lobes than any over-the-ear headphones I have ever used.  Furthermore, the old Apple iPhone 4 earbuds were very harsh to listen to.  However, a trade-off is that, generally, earbuds are somewhat fragile; one of the two pairs of MM50’s died through mishandling.

I was generally happy with them while listening to Shortwave broadcasters with a mix of news/talk and music.  I especially liked them on Mediumwave listening; stations can sound surprisingly good when playing music.  Then I tried using these earbuds on my Amateur Radio transceiver, a Kenwood TS-590S.  I was impressed how clear they sounded with a lack of distortion, although there was too much bass.  Fortunately, Kenwood supplies USB connected software with an TX & RX 18 band EQ (300 Hz spacing, not octaves).

Here is a frequency response chart I found from Reviewed.com for this model:

One of the notable things about these earbuds is the total lack of distortion.  Most likely one of the reasons they sound so clear on Shortwave, which has many LOUD audio spikes.

I had not wanted to get Bluetooth earbuds.  However, I had recently upgraded my cell phone and NO headphone jacks anymore!  So, while I do not use Bluetooth yet for radios, I can see a time in the future to get a Bluetooth transmitter to plug into a radio with a headphone jack.  I am reluctant since I do not like having to recharge my earbuds and I put in a lot of radio listening time.  Am I supposed to buy two Bluetooth earbuds and swap while charging?  Maybe in the future.  And also, am I supposed to buy a Bluetooth transmitter for every non-Bluetooth radio I own?  Not likely gonna happen.

In the meantime, I ordered cheap wired earbuds from Amazon.  I had a $5 credit for trying Prime, so when I saw these Panasonic ErgoFit wired earbuds (RP-HJE120-K) for slightly over $10, I said to myself, “why not?”.   Supposedly wildly popular, they are one of the most rated products on all of Amazon with 133,821 ratings/opinions (perhaps Russian bots?!?!?).

Here is a frequency response chart from ThePhonograph.com for these Panasonic earbuds:

You can see comparatively that the bass response in the very good Sennheiser MM50’s is much stronger, being good music earbuds.  But for voice articulation, not as much, even though they have no distortion.  The Panasonic ErgoFit’s have more modest bass, less of a dip in the lower midrange audio frequencies, and more importantly, has a peak near 2500 Hz and its harmonic 5000 Hz.  The highest highs are also modest compared to the Sennheiser model.  This general frequency response to “recess” the bass and treble frequencies and peak the 2500 Hz is very useful for voice intelligibility.

As described by the famous speaker-microphone-sound-system maker, Bob Heil relates what he learned from the scientists at Bell Labs many years ago.  Speech intelligibility is enhanced when audio is compensated for our natural human hearing.  Equalizing below 160 Hz, reducing the 600-900 Hz region, and peaking the 2000-3000 region centered at 2500 Hz will increase intelligibility dramatically.  The story goes that Bell Labs was tasked by parent AT&T with finding out why the earliest phones in the 1920’s sounded so muffled and hard to understand.  After many experiments, the scientists found the most important frequencies for our ears + brain to comprehend speech.  In other words, our ears are not “EQ-flat” like a scientific instrument is. Continue reading

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Radio Waves: 83 years of ABC Broadcasting, AM to New Zealand Northland, and Taliban blocks RFE/VOA/Radio Liberty

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!


ABC Radio Australia’s 83 years of broadcasting to the world (ABC)

This is the story of one of the ABC’s best kept secrets.

ABC Radio Australia was never intended to be a great secret. It was just the nature of the service that few Australians knew about it. When I hosted its breakfast program for nine years, I could count on one hand the number of people who knew what I was talking about when I told them I worked for RA.

Most people mistakenly thought it was the same thing as Radio National. I would have to explain, yet again, that this was our version of the BBC World Service, a worldwide broadcaster.

RA was founded at the start of the World War II by prime minister Robert Menzies as an antidote to the disinformation being broadcast by Australia’s new enemies, Germany and Russia. The idea of Australia Calling, as the service was initially named, was to provide an antidote to this propaganda, to counter that aerial bilge with factual, balanced and fair reportage.

So with a small team of English, Spanish, Dutch and French broadcasters, a minuscule budget and some tiny transmitters in antiquated shacks in Victoria and New South Wales, Australia joined the short-wave age in December 1939. [Continue reading…]

Boost for AM Broadcasting in NZ’s Northland Region (Content Technology)

Situated on the northwest tip of New Zealand’s north island, and home to the historically significant Waitangi Treaty Grounds, the Northland region is to receive a funding boost to strengthen its AM broadcasting infrastructure.

New Zealand’s Minister of Broadcasting and Media, Willie Jackson, and Minister for Emergency Management, Kieran McAnulty, have announced a NZD$1.48 million package to fund the repair and replacement of three transmission masts in Northland to ensure AM radio can stay on air in the region.

“This funding will secure the reinstatement of the Waipapakauri mast, which services Far North communities, and replace the masts at ?taika and ?haeawai which are on their last legs,” Willie Jackson said. “This will ensure that Northland communities retain their access to AM transmission in areas that are not serviced by FM frequencies.

“RNZ has already completed work to reinstate the Waipapakauri mast, which went back on air today.”

Minister for Emergency Management Kieran McAnulty said radio is a critical information channel to help reach New Zealanders in an emergency.

“When emergencies happen, the National Emergency Management Agency (NEMA) and local Civil Defence Groups work with the media to issue warnings and other critical information. We rely on radio as our number one emergency info channel as it is the most resilient and widely available form of public communication.

“Northland is especially reliant on AM radio due to its remote and rugged terrain, its exposure to hazards like tsunamis, and limited access to cellular service and other information sources,” Kieran McAnulty said. [Continue reading…]

Taliban Blocks Afghan Broadcasts By VOA, Radio Free Europe/Radio Liberty (All Access)

The TALIBAN has shut down several VOICE OF AMERICA RADIO ASHNA FM repeaters and has blocked RADIO FREE EUROPE/RADIO LIBERTY’s Afghan service RADIO AZADI, alleging that the U.S.-backed outlets are violating Afghani press laws and journalistic principles.

A statement from the VOA said that the move, which it noted broke a multiyear contract between the stations and the Afghan government, “is a blow to the large audience that turns to RADIO ASHNA for uncensored news and information. VOA broadcasts provided the people of AFGHANISTAN uncensored perspectives and hope. They gave ordinary Afghans a voice through call-in programs and discussion shows about subjects censored by domestic media. On VOA programs, topics ranged from the increasing isolation of AFGHANISTAN’s current government and the second-class status of women and girls as a result of the TALIBAN’s policies to the persistent economic failures that have diminished the quality of life in AFGHANISTAN since the TALIBAN takeover.”

“Many programs were anchored by women,” said Acting VOA Director YOLANDA LÓPEZ. “Removing VOA from the domestic airwaves will not silence us. It will only increase the importance of serving the captive audience inside AFGHANISTAN.”

The statement noted that the VOA reaches 7.3 million adults per week in the country, with almost half of those listening on broadcast radio; the service can also be heard via satellite TV, shortwave, AM, streaming, and social media and is “actively exploring additional ways to provide our content and fulfill our mission of serving our audience in AFGHANISTAN.” [Continue reading…]

Taliban hit Voice of America with broadcast ban (DW)

US-funded Voice of America said Taliban authorities pointed to “complaints” about their programing. Radio Free Europe was also banned by the Islamist regime.

Voice of America (VOA) and the AP press agency reported that Taliban authorities banned radio broadcasting from VOA and Radio Free Europe/Radio Liberty (RFE/RL) in Afghanistan from Thursday.

According to VOA, the Taliban authorities cited “complaints they have received about programming content” as reason for the ban.

However, there were no further details provided about the alleged complaints, VOA shared in a press statement.

Both VOA and RFE are funded by the US government, but “operate with journalistic independence and aim to provide comprehensive, balanced coverage,” the statement continued.

Whether or not the ban will be extended to other international broadcasters in Afghanistan remains unclear at this point.

In March, some parts of DW’s Afghan programing were stopped from being rebroadcast by Afghan partners, and BBC news bulletins in Pashto, Persian and Uzbek also taken off air.

Taliban say VOA and RFE ‘failed to show professionalism’
Afghanistan’s Foreign Ministry spokesman Abdul Qahar Balkhi told AP his country had laws regulating the media and any network that was “repeatedly contravening” them would be banned.

“VOA and Azadi Radio (Radio Liberty) failed to adhere to these laws, were found as repeat offenders, failed to show professionalism and were therefore shut down,” he said.

The Taliban regime has been cracking down on press freedom in the country by imposing restrictions on media and journalists since seizing power last year. [Continue reading…]


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Giuseppe experiments with mediumwave loop induction

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

Dear Thomas and all friends of the SWLing Post,

I’m Giuseppe Morlè from Formia on the Tyrrhenian Sea…

I wanted to share this experiment of mine with all of you by tuning the medium waves with two separate loop cassettes and each for itself by exploiting the principle of induction between two conductors placed next to each other.

I superimposed one cassette on the other by matching the windings of the medium waves–each variable works only for its own box.

I’m tuning the Algerian JIL FM station on 531 kHz with the Tecsun H-501X connected to the box below…then, passing to the top box, the one without any physical contact with the receiver, I tuned this station again centering it perfectly thanks to the induction that creates between the two close windings.

My video will clarify any doubts and I would like to receive your comments about it.

My constructions are the result of continuous recycling and spending very little to get a good yield.

You can view this video below or on my Youtube channel:

[Note that you can translate this video into your language via YouTube’s automatic subtitles. Click here to learn how to do this.]

I’m available for any clarification…
Thanks to all of you and I wish you good listening.
73. Giuseppe Morlè iz0gzw.

Thanks so much for sharing your antenna experiments with us, Giuseppe! 

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Giuseppe upcycles and improves a homebrew MW antenna

Many thanks to SWLing Post contributor, Giuseppe Morlè (IZ0GZW), who shares the following:

Dear Thomas and Friends of SWLing Post …

This is Giuseppe Morlè. As always, I try recycling what I have and improving upon antennas I’ve built in the past. This is one way we radio lovers can experiment. Many years ago, I made an antenna only for medium waves; by adding a circuit, I can now listen to short waves.

I took advantage of a small frame that I recovered from an old commercial FM / AM stereo receiver by removing its coils for medium waves and I wound around it only two coils sufficient to have a frequency range from 3.5 to 18 MHz.

I remember that the antenna in question also receives medium waves as it was born.

I chose this small frame because I wanted everything to be small in order to carry this compact antenna everywhere.

Unlike my other projects for SW and MW, which have a cable that carries the SW signal to the receiver, this time I used the induction that is created around one end of the loop, which I spiraled to get inside the stylus of my Tecsun PL-660 and which then transfers the signal to the receiver.

I did some tests on my balcony the day after a strong storm and I noticed that the propagation was absent but I still wanted to make sure that everything was working.

[Note that you can translate this video into your language via YouTube’s automatic subtitles. Click here to learn how to do this.]

I will keep you updated on other tests on more favorable days of propagation … I still invite you to follow me on my Youtube channel.

I wish everyone a good listening …
73. Giuseppe Morlè iz0gzw.

Many thanks, Giuseppe. I, for one, love all of your homebrewed and recycled antennas. This one is no exception! What a fun project. I love how you use what you have and aren’t afraid to experiment! Thank you for sharing.

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