Tag Archives: Shortwave Radio

“Shortwave radio evolves into an IoT network”

(Source: Maritime Digitalisation & Communications via Richard Cuff)

KNL Networks is building a mesh network of base stations on ships for securely transmitting operational and machinery data to shore

Shortwave radio can be used for data transmissions from ships to shore and between vessels as an alternative, or even complementary, service to satellite communications.

This is a long way from shortwave radio’s use for voice communications at sea, but KNL Networks has developed this technology to generate a data transportation network. It has built a mesh of multiple base stations and terminals on ships to provide a backbone for internet-of-things (IoT) solutions.

The dedicated IoT network is combined with military-grade security, pole-to-pole coverage and affordable pricing to make maritime IoT connections smarter, said KNL Networks chief executive Toni Linden.

He explained to Maritime Digitalisation & Communications that this shortwave radio network does not have the complexity or issues of satellite communications and can be scaled through simple vessel additions. “We have reinvented shortwave radio so that it is fully digital and automatic,” he said.[…]

Click here to read the full article.

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Cryptocurrency transactions over solar-powered shortwave radios

(Source: @nixops)

(Source: The Next Web via Kim Elliott)

Devs used solar-powered radios to complete first ‘off-grid’ cryptocurrency transaction

Could blockchain help after disaster strikes?

A group of developers claim to have performed a solar-powered cryptocurrency transaction, using shortwave radios and blockchain tech. While it might not be the world’s first radio-transmitted cryptocurrency transaction, the devs insist it is the first one to be completed entirely off-grid.

They managed to do it with just a portable hard drive, a solar battery pack, a shortwave radio, and, of course, some technical know-how.

In addition to these gadgets, the developers used open-source cryptocurrency Burst to conduct the experiment. For the record, the transaction was recorded on Burst’s blockchain without the need for any mains power or data connections.

One of the developers, Daniel Jones, has since teased an image of the improvised setup on Twitter:

Click here to read the full article on The Next Web.

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Radio in the field: SWLing on the coast of the St. Lawrence river

Yesterday, the weather was gorgeous here in Québec, thus a prime opportunity to find a beach, start a new book and, of course, play radio!

I found a fantastic spot on the north bank of the St. Lawrence river near Baie-St-Paul, Québec. There were only a few folks at the beach, so it was all very peaceful.

I found a picnic table perched on the edge of the beach shaded by an apple tree–a perfect spot to relax, play radio and start a new book: Dark Voyage by Alan Furst.

I brought two portables: the C. Crane CC Skywave SSB and the recently acquired Panasonic RF-B65.

I had not checked to see if propagation was good, but tuning to WWV on 10 MHz and 15 MHz confirmed that signals were travelling. In fact, as I started tuning around–first with the CC Skywave SSB, then with the Panasonic RF-B65–I discovered some of the best propagation I’ve experienced in ages!

I did a relatively quick scan covering the 31 through 19 meter bands. Some signals were absolutely booming in.

I jotted down some of the broadcast details on a make-shift log and recorded a few videos.

Note that after making the first video, I discovered I had limited space on my phone, so most of the clips are quite short:

The Voice of America

Click here to view on YouTube.

Radio France International

Click here to view on YouTube.

Radio Guinée

Click here to view on YouTube.

BBC World Service Extra English

Click here to view on YouTube.

Here are the stations I logged in the clear:

All in all it was a brilliant afternoon and the short band scan reminded me that there is still so much content to be found on the shortwaves.

You just need a little propagation, and some time to listen and explore!

Post readers: Have you snagged any elusive DX recently?  Please comment!

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Shortwave Radio Recordings: Radio Nacional de Venezuela (2004) and Media Network (1990)

Many thanks to SWLing Post contributor, Dan Robinson, who shares the following recordings and writes:

With the news over the past few years, and especially over the last few weeks, of the rapid decline of Venezuela, it’s interesting to recall that there was a day when that country was a powerhouse on the shortwave band, with numerous private radio stations that SWL’s around the world could hear in the 90, 60, 49, 31, and 19 meter bands.

There was also a brief attempt to put Venezuela on the map as an international broadcaster, with Radio Nacional de Venezuela which was audible at good signal levels.

Our thanks to Dan for this 45 minute recording, found in Dan’s archives of recordings, from 2004 when Radio Nacional de Venezuela was on the air in October 2004:

Click here to download audio.

Dan also found the following episode of RNW Media Network, which was produced by Jonathan Marks, from March of 1990, with a focus on Venezuela:

Click here to download audio.

Dan, thank you so much for sharing these excellent off-air recordings! I will also add these to the Shortwave Radio Audio Archive. We look forward to any other recordings you might turn up in your archives.

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eBay find: Sony CDX-GT260S car shortwave radio

I still receive a surprising amount of questions about mobile (car/in-dash) shortwave receivers. We have a dedicated category to all things mobile shortwave but it is certainly a radio category with comparatively few options.

One option to consider is the BST-1: a receiver I reviewed two years ago.

And then occasionally car receivers pop up on eBay, like this Sony CDX-GT260S:

Click here to view on eBay.

The Sony CDX-GT260S requires installation, but shouldn’t be overly complicated to install especially in older vehicles.

The seller actually posted the following video of the Sony CDX-GT260S in use:

Post readers: Anyone listen to shortwave in the car?  What’s your receiver of choice?

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