Author Archives: Thomas

SDRuno: SDRplay introduces a free native app for the RSP

(Source: SDRplay Press Release)

SDRplay is pleased to announce the official release of SDRuno for the RSP. SDRuno is the new name for the RSP compatible version of Studio1, the rights to which we obtained and announced on 28th April. SDRuno contains native support for the SDRplay RSP and no extra plugins are required. Third party hardware can also be supported via the ExtIO interface, but with reduced functionality.

SDRuno provides a rugged and flexible, high performance SDR receiver capability and boasts some excellent features:

Multiple ‘Virtual Receivers’ which allow for simultaneous reception and demodulation of different types of signals within the same receiver bandwidth.
A selectivity filter with an ultimate rejection greater than 140 dB.
A unique distortion-free double stage AGC with fully adjustable parameters.
Multiple notch filters with BW adjustable down to 1 Hz, Notch Lock feature.
A unique synchronous AM mode with selectable/adjustable sidebands, dedicated PLL input filter, and selectable PLL time constants.
SNR (stereo noise reduction), featuring a proprietary noise reduction algorithm for stereo broadcast.
AFC for FM signals.
Calibration for receiver frequency errors.

Over time, we plan to add many more features to SDRuno to enhance the user’s experience of this very powerful piece of software. This software runs on Windows and we don’t yet know how easy it will be to migrate it to other platforms but this is something we will be investigating.

SDRuno will be made freely available to all current and future users of the RSP – to download a copy – simply go to http://www.sdrplay.com/windows.html

Our support for SDRuno in no way lessens our commitment to support HDSDR, SDR Console, Cubic SDR or ANY other software solution where the authors are willing to work with us. We fully recognise that many people have strong preferences for particular pieces of software and we do not want to do anything to undermine the options that people have to use their favoured software packages. Indeed, our view is quite the opposite. Our objective remains aim to have our hardware platforms support any and every SDR package out there. This of course may not be possible, but it is our philosophy and part of the ethos of our company.

About Studio 1:

Studio1 was developed in Italy by SDR Applications S.a.s. and has hundreds of happy customers around the world. Studio 1 is known for its user friendly stylish GUI, CPU efficiency and advanced DSP capabilities, including features not available on other SDR software packages.

www.sdrapplications.it

About SDRplay:

SDRplay limited is a UK company and consists of a small group of engineers with strong connections to the UK Wireless semiconductor industry. SDRplay announced its first product, the RSP1 in August 2014

www.sdrplay.com
Email: [email protected]

eBay find: The Mark 328 British Spy Radio

1 Reply

Many thanks to SWLing Post reader Cap, who writes:

This little gem just popped up on eBay UK, it’s working and looks to be in very good condition and is also open to offers:

Click here to view on eBay.

[More info about the Mark 328 (a.k.a. MK.328) can be found here.]

This follows on from the FS5000 spy radio you posted about in April.

If I had a respectable amount to offer this Seller, I think I would.

True–by today’s standards–the Mk.328 isn’t a high-performance receiver. It’s single conversion and probably not über-sensitive.

Still, it’s a working piece of Cold War history and, back in the early 70s, probably packed the biggest punch for the size. I bet it’s over-engineered and will probably outlive most of us.

Mighty tempted to make an offer. I should probably distract myself about now. Thanks, Cap! 🙂

“When everything else fails, amateur radio will still be there—and thriving”

10 Replies

(Source: ARS Technica)

by Rupert Goodwins

It’s a good time to be technical. Maker communities are thriving around the world, tools and materials to create and adapt are cheaper and more powerful now than ever, and open source hardware, software, and information mean that if you can think it, you can learn how to do it and then make it happen.

For one group of technological explorers, this is more than just a golden age of opportunity: it’s providing the means to save one of the oldest traditions in electronic invention and self-education, one that helped shape the modern world: amateur radio. That matters.

Radio amateurs get a sweet deal, with effectively free access to many gigahertz of the same radio spectrum that companies pay billions for. They’ve earned it. Throughout the history of electronics, they’ve been at the borders of the possible, trying out ideas that commerce or government deem impossible or pointless—and making them work. One example of hundreds: Allied military comms in World War II needed a way to reliably control the radios used by front-line forces, replacing tuning knobs with channel switches. Hams had the answer ready and waiting: quartz crystal oscillators. (That’s part of computing history too—you’re probably using about ten of them right now.).

[…]Then, there’s backup. Take the European HAMNET, for example. That’s a four-thousand-node high speed data network covering a large part of continental Europe and providing full IP connectivity at megabit speeds. It connects to the Internet—ham radio owns 16 million IPV4 addresses, believe it or not—but is independent of it, doing its own robust and flexible routing. If the Internet was to go away, HAMNET would still be running. The same’s true of nearly all ham radio infrastructure: when everything else fails—power, comms, roads—ham radio is still there, and these days it can be a full-fat digital medium.[…]

Continue reading at ARS Technica…

London Shortwave: numbers station on top of VOT broadcast

The Snowbirds in Québec City

1 Reply

Maybe it’s my radio-loving fascination with technology, travel, and what at times seems like sheer magic–-but for some reason I’ve long been something of an aviation enthusiast, as well. Over the years, I’ve discovered quite a lot of SWLs and ham radio operators share this interest…and if you’re one of these folks, well, have I got a post for you.

Wednesday in Québec City, as the sun dipped in the sky, viewers standing on the city’s walled fortifications were treated to an amazing aviation display which included a CF-18 Hornet, the CH-146 Griffon and last but definitely not least, the Canadian Forces 431 Air Demonstration Squadron––aka, the Snowbirds.

In the first act, helicopters: four CH-146 Griffon helicopters in neat formation, and then the Canadian Coast Guard demonstrated lowering a guy from a emergency helicopter onto a Coast Guard boat in the middle of the St. Lawrence, , then drawing him back up into the chopper a few minutes later––with, of course, maneuvers throughout.

For the second act, the CF-18 Hornet pounded the sky with an assault of black-and-yellow speed, twice turning and showing both back and belly.

And for the finale, the Snowbirds skimmed into view in exquisite formation, and with tight, astonishing precision, glided around the ramparts of the old walled city, leaving perfectly drawn contrails of colored smoke.

Here are a few photos I snagged of the demo:

The Snowbirds

This particular public event wasn’t granted permission for a full acrobatic show, but the Snowbirds were in the air at least thirty minutes and showed off every one of their nine-plane position formations. And were they ever precise!

The Snowbirds gave us a flawless and graceful show, one I’ll never forget. Canadian readers, you should be mighty proud of your Snowbirds; they’re an aviation team to be reckoned with.

Steve notes the ITU-R Recommendations on Radio Noise

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Commenting on our post about the FCC Noise Floor Inquiry, SWLing Post contributor, Steve Yothment writes:

One of the definitive documents on Radio Noise is the ITU-R Recommendation on Radio Noise, version P.373-12. This (latest) version is dated 07/2015, so it’s only a year old. You can download it [as a PDF] here. It has a lot of info on natural and man-made radio noise.

My favorite graph from the document is shown below:

It shows the level of radio noise vs. frequency for good and poor conditions. It can be rather surprising how noise, even under the best conditions, can be quite excessive on shortwave frequencies. For example, the best case noise level for 10 MHz is about 30dB above the Johnson Noise level. (That’s the noise level from just a resistor at room temperature.) That’s why the noise level in your shortwave receiver’s speaker gets so much higher when you attach the antenna!

That is fascinating, Steve! It’s no wonder we struggle with noise issues–even in the best of times, it appears.

eBay sighting: Barlow Wadley XCR-30 Mark 2

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Many thanks to SWLing Post contributor, Neil Goldstein, who shares a link to this Barlow Wadley XCR-30 Mark 2 on eBay.

The Seller writes the following description:

Up for auction is a rare military green Barlow Wadley XCR-30 Mark2. The radio works perfectly. This is a late serial number 14995.

Please request a shipping quote before bidding as I will charge actual shipping. I will ship via DHL which takes around 7 days.

It’s important to note that detail about shipping since eBay shows shipping as $250. Since it’s being shipped DHL from South Africa, costs could vary greatly, I imagine.

Click here to view on eBay.