Tag Archives: Longwave

Radio Waves: RÚV LW Transmitter Demolished, Dave Rowntree & Longwave, Radio Angela Anniversary, and Como Audio Closes Permanently

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, ______ for the following tips:

Third largest structure in Iceland demolished (RUV English)

Once ubiquitous, few radios now receive long wave broadcasts. Priority is now given to boosting FM signals. RÚV’s long wave transmitter in East Iceland has been demolished.

Monday saw RÚV’s East Iceland long wave transmitter switched off. The mast at Eiðar, at 218 metres the third tallest structure in the country, transmitted RÚV’s radio services across the east of the country and out into the Norwegian Sea. In a statement, RÚV say that the equipment needed to maintain the service is very expensive, and few radios now receive long wave broadcasts.

The change is being made in association with Iceland’s Civil Defence and other bodies concerned with emergencies, as long wave signals have traditionally formed part of emergency communication planning. However, an upgraded FM system will take over this function.

The long wave signal from Eiður, on 207kHz, has been replaced by a more powerful FM network in East Iceland. RÚV has increased the number of FM transmitters and renewed existing masts. Long wave transmissions will continue for a time on 189 kHz from Hellissandur at Gufuskálar in West Iceland – Iceland’s tallest structure at 412 metres – but it too will ultimately close, and then the FM system will fully take over the role of safety broadcasts. [Click here to continue reading and watch demolition video…]

Click here to watch the RUV report on the end of this longwave service (in Icelandic).

Blur’s Dave Rowntree: Long wave radio changed my life – BBC mustn’t switch it off prematurely (iNews.co.uk)

Long wave radio changed Blur drummer Dave Rowntree’s life. Now he warns the BBC not to switch off the shipping forecast signal until the whole country is digitally connected

From childhood to his chart-topping days with Blur, long wave radio has played a central role in Dave Rowntree’s life.

Now the drummer has warned that the BBC’s plans to switch-off the crackly signal could disenfranchise millions of radio listeners who still struggle to receive digital transmissions.

The BBC will end AM radio transmissions – including long wave, home of the Shipping Forecast and medium wave – currently still accessed by an estimated 6.5 million listeners each week.

BBC Radio 5 Live’s medium wave frequencies will fall silent by the end of 2027 with a date for ending long wave currently under discussion.

Rowntree, who holds an amateur radio licence and took inspiration from the shipping forecast for Blur’s hit “This Is A Low”, said the signal should not be turned off prematurely. Continue reading →

Frans’ meditation at 198kHz with the Siemens REL 445 E311 b1b

WI2XLQ: Brian Justin’s annual longwave broadcast on Christmas Eve and New Year’s Eve

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Canadian Reginald Aubrey Fessenden in his lab believed circa 1906 (Source: Radio Canada International)

Now an annual Christmas tradition, Brian Justin (WA1ZMS) will put his longwave experimental station WI2XLQ on the air to commemorate the anniversary of Reginald Fessenden’s first audio transmission.

As in years past, he will be conducting the Fessenden transmission on Christmas Eve, as well as New Year’s Eve. The plan is to start each day around 1800z and run for 24 hours.

Listener reports may be sent to Brian Justin, WA1ZMS, at his QRZ.com address.

If you would like more information about Brian Justin and WI2XLQ, check out our interview with him in 2013.

Additionally, SWLing Post reader, George Stein has a very personal connection with radio pioneer, Reginald Fessenden: click here to read his story.

Radio physics explained: The Luxemburg-Gorky effect

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Get it while you still can: The Luxemburg-Gorky effect

by 13dka

The Radio Luxembourg longwave transmitter Junglinster in the 1930s [RTL Group]

“In radiophysics, the Luxemburg-Gorky effect (named after Radio Luxemburg and the city of Gorky (Nizhny Novgorod)) is a phenomenon of cross modulation between two radio waves, one of which is strong, passing through the same part of a medium, especially a conductive region of atmosphere or a plasma.” (Wikipedia)

That sounds pretty abstract, right? In my own words, imagine your radio is tuned to a station on let’s say 162 kHz, 500 miles away. Somewhere in the middle between your receiver and the 162 kHz transmitter is a station transmitting on a different frequency, let’s say 234 kHz. The Luxemburg effect is that you can hear the modulation of the 234 kHz transmitter in the middle, on the 162kHz station you are receiving. The effect is not depending that much on the frequency/wavelength though, the longwave station could affect medium wave stations and it has been created using shortwave frequencies far apart.

It was observed first in 1932, when listeners of the Swiss Beromünster 60kW medium wave station built just one year prior also heard a bit of Radio Luxemburg’s longwave transmitter (250kHz) on the Beromünster frequency (653kHz until 1934). Of course this was assumed to be some kind of crosstalk within the receivers and probably drove radio engineers insane until 1933, when Bernhard D.H. Tellegen, a Dutch electrical engineer and inventor suggested the true origin of the effect: The new (1932) 150kW Radio Luxemburg longwave transmitter in Junglinster was directly modifying the ionosphere hundreds of kilometers above, it “heated” the ionosphere in a way that it made the plasma’s charge and reflectivity follow the amplitude modulation of Radio Luxemburg, thus modulating waves of other wavelengths crossing this part of the ionosphere.

Practical demonstration

Even if you’re living in Europe, you may never have witnessed that effect and according to this article by Paul Litwinovich, chances to observe this in the US are rather slim, due to the relatively low power of the stations. I’m in Europe but never noticed it either – until recently: Continue reading →

HanRongDa HRD-747: Expanding reception to include longwave

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Many thanks to SWLing Post contributor, Dan Robinson, who shares the following video which shows how connecting an external antenna to the HDR-747 extends reception range down to longwave:

Click here to view on YouTube.

Thanks for the tip, Dan!

Note: Dennis adds that the antenna used in this video can be found here.

Uli asks: “How well does the Icom IC-705 receiver work on longwave?”

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Many thanks to SWLing Post contributor, Uli (DB1ULI), who writes:

Hello Thomas,

I started to enjoy BCL and SWL some week ago (again). I have a HAM license for many years, but was QRT for the past few years. Now, the HAM bug bit somehow again and I’ve been listening to the bands via a Tecsun H-501 but changed this one to a Reuter Pocket already.

The Reuter Pocket (Source: Reuter)

The Pocket is a really great receiver including also the FM Bands and the popular (in Europe) Digital Broadcasting DAB.

Still, it is just a receiver. So for now I am searching for a new rig, too. The current offerings are all tempting, FT-DX 10, FT-991A, IC-7300, IC-705 and so on. I really like the new models due to their features, and most due to their displays. My former rig was a Yaesu FT-897.

I already read your and the other reviews of the IC-705 (especially the BC receiving parts) and it could replace the Reuter in many ways. I am just a little bit reluctant because I like the longwave band a lot (we still have stations here) and there is no info to find anywhere how it works below 500kHz. MW seems to be on par with most other receivers.

Do you have an idea about a source of information concerning the capabilities of the IC-705 below 500kHz?

All the best and 73,
Uli

Great question, Uli. I’m hoping that some of our European IC-705 owners may be able to help you here. Although I’ve spent a lot of time on mediumwave with the IC-705, I’ve done little exploring of longwave.

Please comment if you have thoughts on the IC-705’s longwave performance!

Experimental Station WI2XLQ will recreate 1906 Fessenden transmissions again this Holiday season

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Canadian Reginald Aubrey Fessenden in his lab believed circa 1906 (Source: Radio Canada International)

(Source: ARRL News)

Experimental Station will Recreate 1906 Fessenden Transmissions

Experimental station WI2XLQ will be on the air on 486 kHz AM for the Reginald Fessenden commemorative transmission. Brian Justin, WA1ZMS, is the licensee. He will transmit for 24 hours starting at 2000 UTC on December 24, with a repeat transmission starting at 2000 UTC on December 31. Justin will use a homebrew 1921-era MOPA exciter with Heising modulation, followed by a modern 500-W linear. The transmission will be the same as in past years — two violin pieces that Fessenden claims to have played as one of the very first voice transmissions from his Brant Rock, Massachusetts, radio lab site. “While doubt remains that such a transmission ever took place, Fessenden did perform some crude voice transmissions over a few miles distance in early December near Washington, DC, as a demonstration for the US Navy,” Justin said. “So, perhaps some credit is due Fessenden for his efforts to transmit the human voice in an era of spark transmissions.”

If you would like more information about Brian Justin and WI2XLQ, check out our interview with him in 2013. Indeed, I successfully heard the 2013 WG2XFG broadcast and posted this audio clip on the Shortwave Radio Audio Archive.