Yearly Archives: 2016

Jagadish Chandra Bose and the invention of radio

Jagadish Chandra Bose in Royal Institution, London

Jagadish Chandra Bose in Royal Institution, London

Many thanks to SWLing Post reader, A Black, for sharing the following article from the excellent Hackaday blog:

J.C. BOSE AND THE INVENTION OF RADIO

The early days of electricity appear to have been a cutthroat time. While academics were busy uncovering the mysteries of electromagnetism, bands of entrepreneurs were waiting to pounce on the pure science and engineer solutions to problems that didn’t even exist yet, but could no doubt turn into profitable ventures. We’ve all heard of the epic battles between Edison and Tesla and Westinghouse, and even with the benefit of more than a century of hindsight it’s hard to tell who did what to whom. But another conflict was brewing at the turn of 19th century, this time between an Indian polymath and an Italian nobleman, and it would determine who got credit for laying the foundations for the key technology of the 20th century – radio.

Appointment and Disappointment

In 1885, a 27-year old Jagadish Chandra Bose returned to his native India from England, where he had been studying natural science at Cambridge. Originally sent there to study medicine, Bose had withdrawn due to ill-health exacerbated by the disagreeable aroma of the dissection rooms. Instead, Bose returned with a collection of degrees in multiple disciplines and a letter of introduction that prompted the Viceroy of India to request an appointment for him at Presidency College in Kolkata (Calcutta). One did not refuse a viceroy’s request, and despite protests by the college administration, Bose was appointed professor of physics.

Click here to continue reading on Hackaday…

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DXing on the Road in Colombia with Don Moore

Radio Mil Cuarenta's studio in Popayan, Colombia. (studio with station's car in front)

Noted DXer and South American radio enthusiast Don Moore (USA) is travelling again and posting fascinating photos & commentary of DXing and life in Colombia.

Don mentions:

The focus is MW. My postings include photos and local recordings of stations from southernmost Colombia including the cities of Pasto and Popayan.  I’m currently in Cali (the third largest city) for two weeks. I’ll also get a complete band scan completed in the next few days.

His current journal entries, photos, and DX clips are on his web site.The Todelar network building in Pasto.

Be sure and check out Don’s extensive coverage of the Central and South American radio scene, and coverage of his previous travels at http://www.pateplumaradio.com

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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Andrea’s photo tour of Radio Nacional de España

Andrea-Radio-Exterior-Espana-REE-20160121_165135 Many thanks to SWLing Post contributor Andrea Borgnino who, as a follow-up to his post yesterday, is sharing the following photos of the Radio Nacional de España (RNE) Casa de la Radio in Pozuelo, Madrid, Spain. Andrea also includes some excellent interior shots of the Radio Exterior de España studios. Click on the images below to enlarge:
Andrea-Radio-Exterior-Espana-REE-20160121_165120Andrea-Radio-Exterior-Espana-REE-20160121_090039Andrea-Radio-Exterior-Espana-REE-20160121_111522Andrea-Radio-Exterior-Espana-REE-20160121_090017 Andrea-Radio-Exterior-Espana-REE-20160121_152546 Andrea-Radio-Exterior-Espana-REE-20160121_152418 Andrea-Radio-Exterior-Espana-REE-20160121_152236 Andrea-Radio-Exterior-Espana-REE-20160121_153612 Andrea-Radio-Exterior-Espana-REE-20160121_153409 Andrea-Radio-Exterior-Espana-REE-20160121_153340 Andrea-Radio-Exterior-Espana-REE-20160121_153333

Again, thanks so much for sharing these, Andrea!

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Blinq sale: Used Sony ICF-SW7600GR $89.39 shipped

Fullscreen capture 1222016 22338 PMBlinq.com has another “used” Sony ICF-SW7600GR in inventory.

As I mentioned once before when one of these surfaced on Blinq, this is a great deal for an excellent radio. This is a used unit, but if you receive it and are not pleased, you can return it to Blinq free of charge.

Actually, if you’re clever (!) you can save an additional 10% on this ‘7600GR…

If you’ve never visited Blinq.com, or if you open their website in a private/incognito window, Blinq will typically pop up a window offering 10% off for new shoppers as long as you subscribe to their newsletter. You then receive a coupon code via email you can use with the first order.

Click here to view the used Sony ICF-SW7600GR on Blinq.com.

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SDRplay shipping the RSP in quantities of 1,000 a month

SDPlay-RSPThis article from Electronics Weekly just popped up in my news feed:

SDRplay of Wakefield, the 18-month-old software defined radio specialist, is now shipping its $149 software defined radio (SDR) receiver in quantities of 1,000 a month

Inspired by the SDR capabilities that even a simple 8-bit TV dongle can perform, SDRplay had the idea of partnering with Mirics to take their 12-bit wideband broadcast chipset and to re-purpose it for the hobbyist market.

At the moment, the hobbyist market for SDR radios tends to be dominated by radio amateurs and ‘short-wave listeners’ and SDRplay’s initial product, the ‘Radio Spectrum Processor’ (RSP) has been well received – winning Ham Radio Science’s RSP ‘Best Bang for the Buck’ rating.

Continue reading at Electronics Weely’s website…

I’m quite proud of the folks at SDRplay as their RSP is truly one of the best receiver values on the market right now.

After (apprehensively) agreeing to review the SDRplay RSP last year, I was simply blown away by this little $149 receiver’s performance. Click here to read the review. Later, I couldn’t bring myself to return the RSP on loan for the review–so I purchased it instead.

I’m glad I bit the bullet!

In fact, last year, at the SWLing Post DXpedition, my buddy, Mark Fahey–who traveled all the way from Australia–forgot to bring the appropriate power adapter for his WinRadio Excalibur, so I let him use mine. I had planned to run the WinRadio Excalibur and Elad FDM-S2 simultaneously on my PC so that I could record spectrum in two different parts of the band at the same time.

Fortunately, I brought the SDRplay RSP, so it took the Excalibur’s place and ran alongside the FDM-S2. It worked amazingly well!

(I should note here that I also believe the FDM-S2 is a great value–at $519 US, it holds its own against receivers that cost upwards of $1,000.)

Shortly after I published my RSP review, I invited SDRplay to become a sponsor of the SWLing Post. I’m happy they accepted. Sponsorship on the SWLing Post is only open to retailers and manufacturers who produce quality goods; those who are well-known in the industry and, often, ones with which I have direct experience. I think SDRplay is a great fit.

So, Kudos to Jon Hudson and his team at SDRplay! I’m very happy to hear how popular the RSP has become.

If you’re an RSP owner, or plan to be soon, make sure you check out the official SDRplay forum and the SDRplay Facebook group: both excellent resources backed by active SDR enthusiasts!

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Expecting a winter storm? Ready your radio

Winter-Storm-JonasMany of us living in the eastern half of North America are bracing for a winter storm this weekend.

If predictions are correct, this storm could dump a lot of snow, sleet, and freezing rain in  many areas.

Winter-Storm-2Of concern to many is the potential for power loss across the region, should this storm have the expected impact. I, myself, live in a rural mountainous area and fully expect to lose power at some point this weekend. (Keep this in mind if you try contacting me.)

Often when a storm is pending, people rush to the stores to buy bread, milk, and eggs. What I concern myself with is stocking up on power!

And you can guess why.  It’s a fact, and a fun one: some of the best shortwave/mediumwave listening conditions happen during a regional power outage. The local noise level simply dives as noisy electronics take a temporary vacation…leaving an opening for some great SWLing.

Here’s my pre-winter storm checklist:

  • Charge batteries
    • Recharge AA cells for portables
    • Charge the internal battery in my CommRadio CR-1a
  • Have the World Radio TV Handbook handy
  • Have several flashlights at the ready (I’m especially partial to the HumanaLight!)
  • Make sure gasoline tanks for the portable generator are topped up
  • Fill the 4×4 with diesel
  • Charge my VHF/UHF Handy-Talkies
  • Oh, yeah…stock pantry/fridge with plenty of food and water

No power?  No problem!  While the snow blows, I’ll feed the fire in the wood stove, brew a steaming pot of joe with my syphon coffeemaker, and cozy up to my warm radio…for a long afternoon of listening.  Ahhh...

SWLing Post readers: How do you prepare for potential power outages?

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Special deal: Tecsun PL-360 for $33.99 plus shipping via Anon-Co

Tecsun-PL-360Many thanks to SWling Post contributor, Ron, who writes:

http://www.anon-co.com/product/pl360

No, it’s not a GP5/SSB, but at less than half the cost it’s fine for general use.

Anna is first-rate to deal with, too.

Indeed she is, Ron! I’ve only has excellent experiences working with Anon-Co.

You can buy directly from Anon-Co’s website, or via eBay.

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