Yearly Archives: 2016

German regulators prohibit digital modes on broadcast bands

DigiDX

(Source: Kim Elliott via Richard Langley)

VOA Radiogram, 2-3 April 2016: BNetzA sagt nein!

New this weekend is the elimination of the digital text modes from shortwave transmitters in Germany.

The German regulator Bundesnetzagentur has ruled that the digital modes are not allowed in the broadcast bands. Because of this, there will be no MFSK32 on The Mighty KBC this weekend, because it uses a transmitter in Nauen, Germany. And, for the time being, there will be no DigiDX MFSK broadcasts on Channel 292, 6070 kHz, and Radio 700, 3985 kHz.

Listeners in Germany might want to note these arguments for the digital modes on the shortwave broadcast bands:
1) It is broadcasting, not point-to-point communication.
2) It can be received on any shortwave radio, even inexpensive portables with no SSB capability. (Software is required to decode the text and images, but this can be included in future shortwave radios.)
3) DRM is legal on the shortwave broadcast bands, and DRM can transmit text and images.
4) Text and images via analog radio requires less spectrum (bandwidth) than DRM.
5) Text and images via analog radio are a useful new application for underutilized shortwave transmitters and frequencies.
6) Text and images via analog radio extend the range of a shortwave transmitter, resulting in accurate content in conditions where voice transmissions may be unintelligible.
7) Digital modes via shortwave can be a useful alternative when the Internet is not available due to disasters or to net censorship by dictators.

On the same note, SWLing Post contributor, Harald Kuhl, also comments with a news release from DigiDX:

“DigiDX transmissions via Channel 292 (6070kHz) and suspended until further notice. This is due to action by the German regulator Bundesnetzagentur against digital mode transmissions and is beyond our control. Broadcasts via WRMI will continue and we hope to find another outlet to use for transmissions to Europe.”

[later:]·

“Good news – Thanks to Jeff White we have another frequency for this Sunday’s broadcast which should be better for Europe. 15770kHz at 2130. Please can anyone in Europe, North America and elsewhere please send reception reports to [email protected] for this extra broadcast.”

Sources: DigiDX website & FB

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The Crosley Radio Corporation’s 1936 “WLW Model Super-Power Radio Receiver”

Crosley

(Image: AntiqueRadios.com)

(Source: Nuts and Volts)

In 1935, the Zenith Radio Corporation produced a stunning radio receiver called the Stratosphere model 1000Z. The set used 25 tubes and three loudspeakers — more than any other radio to date. An amazing (for the time) 50 watts drove its three speakers — one 6 inch dynamic high-frequency and two 12 inch dynamic low-frequency speakers.

Standing 50-1/2 inches tall, the Stratosphere sold for $750.00 — more than many automobiles; in comparison, a new Ford cost $652.00. At that price, it’s no wonder that only about 350 sets were produced during the four years that the Stratosphere was offered.

This achievement impressed Powel Crosley, Jr. — the President of the Crosley Radio Corporation — who praised it as a fine example of quality in radio construction, but it used “only” 25 tubes and three speakers! Crosley — who also owned the 500,000 watt powerhouse radio station, WLW — was inspired to surpass Zenith by bringing the world the largest and most powerful radio receiver yet known.

[…]Out of the numerous [engineering conferences were held throughout the winter months] and Crosley’s imagination came the basic specifications: the radio would be a superheterodyne receiver with no fewer than 30 tubes, six loudspeakers, four chassis; a suitably impressive cabinet would house it. More intricate than any set ever built, it would naturally have the highest possible quality and richness of tone.

[…]In its completed form, the WLW Model Super-Power Radio Receiver indeed surpassed the Zenith Stratosphere model. It had 37 tubes, six speakers, and 75 watts of power. The cabinet stood 58 inches tall, 42 inches wide, and 22 inches deep. Everything inside the cabinet that could be was chromium-plated. The transformer coils, tubes, and speaker frames were finished in black and each chassis had its own serial number plate.

Continue reading the full article at Nuts and Volts…

Regular SWLing Post readers know that I’m a bit of a vintage radio nut, so I thought I’d do a little digging to see if any WLW Model Super-Power Radio Receivers had been sold or auctioned recently.  I was curious what sort of price they’d fetch.

Let’s just say, some owners demand a high price…Crosley-WLW-Receiver-eBay

This unit was put up for sale on eBay for $160,000 US last year! While I know the Crosley WLW receiver is rare, that price was obviously over the top as is wasn’t sold. Still, the seller included some great photos of this near-mint model:

Crosley-WLW-RX

WLW Model Super-Power Radio Receiver-1 WLW Model Super-Power Radio Receiver-2 WLW Model Super-Power Radio Receiver-3 WLW Model Super-Power Radio Receiver-4

Around the time of the Zenith Stratosphere and the Crosley WLW–the mid to late 30s–radio manufacturers must have either believed there was a market for these high-end, high-fidelity receivers, or they simply enjoyed designing and manufacturing them as a company benchmark or showpiece.

While not as feature-packed as the Crosley WLW receiver, at the National Capital Radio and Television museum last year, I was completely enamored with this gorgeous powerhouse console: the E.H. Scott All-Wave 23 console.

Scott-ConsoleRadio

The docent told me that the E.H. Scott All-Wave 23 console could easily fill a banquet hall with hi-fi audio. It sported 23 tubes and a very large speaker. If memory serves, it originally sold for $750–easily three or four times the price of most console radios.Scott-Console-Radio-Dial

Post readers: Do you know of any other benchmark console radios?  Do you own one of these amazing receivers?  Please comment!

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eBay Deal: Funcube Dongle Pro Plus SDR $100 shipped

eBay-FunCube

Many thanks to SWLing Post contributor, Mario Filippi, who points out this Funcube Dongle Pro Plus with a BuyItNow price of $100 on eBay.  The seller appears to have a long eBay history and a 100% rating.

FunCubeDonglePro

Mario and I were both tempted at one point to snag the Pro + at this price, but neither one of us needs another SDR.  Please, someone buy it before I change my mind and buy it in a moment of weakness! 🙂

Click here to view on eBay.

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What Would YOU Pay for a New, Sealed Box Sony ICF-2010?

Every radio enthusiast knows that the Sony ICF-2010/2001D was a desirable, high performing portable receiver throughout its long production history. Manufactured from 1985 through 2003, few receivers were as consistently high on DXers’ “must have” list as the ICF-2010.sony2010

These Sony portables still command high prices on the used market, but what would you pay for a brand new, still in the sealed factory carton ICF-2010? Well, someone just won the high bid on this new, unopened 2010 for the princely sum of $982.00 USD plus shipping:

http://www.ebay.com/itm/SONY-ICF-2010-RECEIVER-BRAND-NEW-STILL-IN-FACTORY-SEALED-BOX-/111948598883

What’s your opinion? Outrageous, foolhardy purchase or a savvy investment for the future? Please comment below with your thoughts.

Guy Atkins is a Sr. Graphic Designer for T-Mobile and lives near Seattle, Washington.  He’s a regular contributor to the SWLing Post.

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Guest Post: Using the HackRF One for DGPS Beacon Reception

h1-preliminary1-445Many thanks to SWLing Post contributor, Mario Filippi (N2HUN) for the following guest post:


Receiving  with a HackRF One, SDR#, and MultiPSK

by Mario Filippi (N2HUN)

The HackRF One is a Software Defined Radio manufactured by Great Scott Gadgets (www.greatscottgadgets.com) and has been on the market for a few years. Having used an SDR-Dongle for several years I felt it was time to “step up” to this wideband (1 MHz – 6 GHz) receiver to investigate a broader breadth of the radio spectrum, so one was purchased from Sparkfun (www.sparkfun.com).

Recently I performed a rudimentary evaluation of its ability to receive DGPS (Differential Global Positioning System) beacons found in the Longwave band  between 285 – 325 KHz; this frequency range is well below the HackRF One’s stated lower receive limit of 1 MHz.

100_5864

DGPS beacons, when tuned using SSB, emit a distinctive warbling sound, and at this QTH, depending on band conditions and time of year, can be heard as far away as the Midwest. Winter brings the cold weather but also excellent conditions for receiving these beacons, some of which were former marine radiobeacons retrofitted to provide greater DGPS accuracy.

The HackRF One, when used with SDR#, MultiPSK, audio piping software, and a good (43 foot vertical) receiving antenna was able to receive DGPS beacons, and two screen captures are below:

DGPS beacon from Sandy Hook, NJ. SDR# using HackRF One in foreground, MultiPSK software in background with decoded information.

DGPS beacon from Sandy Hook, NJ. SDR# using HackRF One in foreground, MultiPSK software in background with decoded information. Click to enlarge.

DGPS beacon from Moriches, NY. Click to enlarge.

DGPS beacon from Moriches, NY. Click to enlarge.

I was very pleased that the HackRF One was able to receive DGPS stations, though tuning them in seemed a bit trickier than with a standard RTL-SDR dongle.  Since this time of year is not optimal for monitoring DGPS beacons, as well as the Longwave band in general, it’s reassuring to know that come winter I’ll be able to do some DGPS beacon DX’ing with the HackRF One.  However, anyone with a shortwave radio and a good antenna can avail themselves of DGPS beacon hunting, just tune down between 285 – 325 KHz and listen for the distinctive warble.

To decode, look into an excellent program like MultiPSK (http://f6cte.free.fr/index_anglais.htm). 73’s!


Thank you, Mario, for another great post!

When Mario told me he had purchased the $299 HackRF One, I was hoping he would do some guest posts about this SDR–DGPS beacons was use I had never thought of. Looking forward to more of your guest posts, Mario!

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The BBC World Service A16 shortwave broadcast schedule

(Image source: BBC)Many thanks to SWLing Post contributor, Dan H, who writes:

The A16 schedule is released for BBC World Service. Here is a link to the A16 frequency page which features additional links to regional frequency charts and transmitter details.

http://www.bbc.co.uk/programmes/articles/2x9tqt6mc05vB2S37j8MWMJ/global-short-wave-frequencies

Good news for me is the BBC World Service English language transmission on 11890 kHz from 1500-1700 UTC. Although beamed to Afghanistan and Iran this signal has been strong in northern California for the last several mornings! I must be receiving an odd lobe off of this one! Now I have BBC during breakfast in addition to 7445 kHz I use during my evenings at 0500. Here is a video I shot of 11890 reception this morning.

(Click here to view on YouTube.)

I hope this information is useful for SWL Post readers.

Indeed it is!  Thank you for sharing the schedule info and your video, Dan!

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London Shortwave says farewell to Radio Belarus

london shortwave belarus

SWLing Post contributor, London Shortwave, hit his local park today with his Tecsun PL-680 and Zoom H1 in tow, then recorded the final broadcasts of Radio Belarus. He has published a post on his blog with details and two recordings of Radio Belarus.

Click here to read his post.

Many thanks to London Shortwave for also going out of his way to post both recordings on the Shortwave Radio Audio Archive! If you have a recording of Radio Belarus, we can add it as well.

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