Radio Waves: Plant-powered Satellite Comms, BBC Pips, Filter Basics, and Replacing Shortwave

Radio Waves: Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers. To that end: Welcome to the SWLing Post’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Marty, Dennis Howard, Dennis Dura, Kris Partridge and Richard Langley and for the following tips:

Plant-powered sensor sends signal to space (Phys.org)

A device that uses electricity generated by plants as its power source has communicated via satellite—a world first.

[…]The device can inform farmers about the conditions of their crops to help increase yield, and enable retailers to gain detailed information about potential harvests.

It transmits data on air humidity, soil moisture and temperature, enabling field-by-field reporting from agricultural land, rice fields or other aquatic environments.

The extremely low power device sends signals at radio frequencies that are picked up by satellites in low Earth orbit. It was developed by Dutch company Plant-e and Lacuna Space, which is based in the Netherlands and the UK, under ESA’s programme of Advanced Research in Telecommunications Systems (ARTES).[…]

The eccentric engineer: a tale of six pips and how the BBC became the national arbiter of time (Engineering and Technology)

This edition of Eccentric Engineer tells the story of the BBC Time Signal and how, over the years, it has just got more complicated.

Every engineer needs to know the time, if only so as to not miss lunch. Since 1924, many Britons have been checking their watches against the BBC time signal, known affectionately as ‘the pips’.

The history of the ‘pips’ is almost as long as the history of the BBC itself. The first transmissions from what was then the British Broadcasting Company began in late 1922 and soon afterwards there were suggestions of broadcasting a time signal under the control of the Royal Observatory at Greenwich – then the arbiter of time in the UK.

No one seems to have seen a need for this degree of precision, but early broadcasts did use their own ad hoc ‘pips’, marking the 8pm and 9pm news programmes with a time signal consisting of the announcer playing the Westminster chimes on a piano and later a set of tubular bells. This proved rather popular with listeners, who could now adjust their clocks and watches daily, so the BBC decided to invest in some more high-tech clocks from the Synchronome Company. These provided audible ‘ticks’, which the announcer then simply counted down.[…]

What Is Replacing Shortwave? (Radio World)

A joint effort is necessary to bring the digitization of radio to a successful end

Analog shortwave will celebrate about 100 years of existence in 2028 when many hope 5G will have been properly defined, tested and applied, though broadcasting is low on its long list of perceived advantages.

It’s true that shortwave was typically a medium of the Cold War that peaked in 1989 and that afterward its listenership dwindled. Many international broadcasters gave up on it as the post-war transmitters got rustier and the energy bills kept mounting.

After all, when budget cuts are needed, no transmitter will go on strike or write to the press, as happened when the BBC World Service tried to unsuccessfully close its Hindi shortwave transmissions in 2011. In 2020 these broadcasts stopped, when committed BBC Indian listeners, writers and thinkers who opposed it in 2011 did not protest too much.

The slow death of shortwave has been blamed on the internet and satellite. As technology and content are inextricably linked, shortwave created its type of content that is no longer favored by the savvy FM listener, internet user and cellphone obsessed.[…]

Filter Basics: Stop, Block and Roll(off) (Nuts and Volts)

A casual observer might think that wireless systems consist primarily of filters connected by the occasional bit of circuit! Block diagrams of transceivers often include as many filters as any other function. This is true at the system level, just as it is at the circuit level — and many circuits behave in a filter-like way, whether intended to be a filter or not! That makes understanding filter basics important for wireless success.[…]

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Encore – Classical Music on Shortwave

Rescuing the Eton E1 from a sticky situation

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I’m back from a week of travels and the 2020 Winter SWL Fest. In short, is was another amazing Fest and so much fun. I hope to write more about it in the coming days, when I have a few moments to catch up and after I shake a nasty bug (chest cold) I picked up.

Although I had no intention of making purchases at the Fest beyond a few raffle tickets, I couldn’t resist snagging an Eton E1 (XM version) at a silent auction from the estate of our recently-departed friend, Tony Pazzola (WB2BEJ). Tim Moody kindly organized the silent auction.

Tony was an amazing friend to all and an avid radio collector, so there were some excellent radios offered up in the silent auction–I could have easily easy bid on each and every one of them! In the end, though, only one really caught my eye: the Eton E1 XM.

A small sampling of the radios from Tony’s estate.

Tony took amazing care of his radios, but his Eton E1 XM suffered from what all of those models eventually do: a sticky chassis.

Back in the day (roughly 2009 to 2013) Eton/Grundig covered a number of their radios models with a rubberized coating that unfortunately breaks down over time and becomes tacky or sticky to the touch.

I think this E1’s sticky coating put off potential bidders.

It was particularly nasty–if you picked up the radio, you had to immediately wash your hands.

The E1’s starting bid on Friday was $200–quite fair considering this unit is fully-functional and comes with all software, cables, manuals and a SiriusXM radio antenna. By Saturday, the starting bid had been decreased to $150. I resisted putting in an offer, but after seeing that it didn’t sell after all bidding had ended, I couldn’t resist. That E1 needed a good home, right? Plus the proceeds go to Tony’s family.

The sticky coating didn’t scare me. If you’ve been an SWLing Post reader for long, you’ve no doubt read our numerous posts about cleaning off this mess. There are a number of solutions, but I’ve heard the most positive long-term results by employing a de-greasing product called Purple Power (click here to read archived posts). Indeed, it’s the solution Eton Corporation recommends.

On the way home Monday, I stopped by a big box store and grabbed a bottle of Purple Power.

Tony still had the original plastic film on the large backlit display.

Sporting a pair of nitrile gloves, I grabbed a bunch of paper towels and a few cotton swabs, then started the cleaning process. I spent the better part of an hour carefully going over the entire body of the E1and trying to remove residue in every crevice without allowing the Purple Power solution to creep under buttons.

In short? I’m very pleased with the results and am now a solid believer in Purple Power.

As others have reported, Purple Power breaks down the sticky residue and allows it to be removed with a cloth or towels with very little scrubbing. Indeed, the process was much easier than I anticipate.

Now I have a super-clean Eton E1 XM to put on the air!

Now I have no excuse to finally remove the sticky residue from both my Grundig G6 and G3!

So far, I’m loving the Eton E1. It is, no doubt, a benchmark portable. Of course, another motivation behind snagging this E1 is so that I can compare it with the Eton Elite Satellit once it eventually hits the market.

Do you have an Eton E1? What are your thoughts about this receiver? Please comment!

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FTIOM & UBMP, March 8-14

Tate Modern ISS installation doubles as ham radio antenna

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Photo by @helenleigh

Many thanks to SWLing Post contributor, Matthew, who shares the following tweet from Helen Leigh:

This sculpture at the Tate Modern blew my mind this week. It’s a wire sculpture inspired by the International Space Station that functions as an antenna for a ham radio.

Photo by @helenleigh

Twice a day it plays live audio and data transmissions from the ISS as it passes overhead.

Click here to view on Twitter.

Fascinating! Goes to show that the Tate Modern is always chock-full of amazing discoveries. Thank you for sharing this, Matthew!

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Radio Waves: B&W to Color, Antenna Wins, Hearing Voices in the Walls, and Beached Whales

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Radio Waves: Stories Making Waves in the World of Radio

Many thanks to SWLing Post contributors Ron, Paul Walker, and Troy Riedel for the following tips:

Colorizing black and white photos (Antique Radio Forum)

Ron shares this link to a discussion about vintage black and white photos that have been auto-colorized.[…]

State law protects ham radio operator, frustrates neighbors in Windsor Twp. (York Dispatch)

A Windsor Township resident whose neighbors are upset over her amateur radio tower is within her rights to have the antenna on her property, township officials confirmed Monday.

An engineer went out to the site in the 400 block of White Rose Lane to inspect the 40-foot tower and ensure it didn’t pose a safety threat to neighbors, township engineer Chris Kraft told the board of supervisors at a meeting Monday.

“Based on that review, we feel the tower is structurally safe,” he said.

Lindsey Fowler is the homeowner who built the tower on her property last September. Fowler is a licensed amateur radio operator, according to Federal Communications Commission records, and her license is valid through December 2021.

[…]Marc McClure, one of the neighbors who lives near Fowler, told the board in October that he and several other neighbors were opposed to the tower and said it should be removed, according to minutes from the Oct. 21 board meeting.

McClure said the tower was an eyesore in the neighborhood and that he and others were concerned about the structural safety of the tower were it to fall, as well as the potential unknown health hazards from exposure to radio frequencies.

The neighbors were also worried about a decrease in their property values, McClure said.

[…]In Pennsylvania, amateur radio operators’ rights are protected by state statute, and municipalities are not allowed to unreasonably restrict the installation of towers fewer than 65-feet high.

And now that the township has confirmed there’s no safety risk to Fowler’s neighbors, township officials said the dispute is outside of their purview.[…]

Lockport family says mysterious voices, music come from house’s walls; local radio station may be source (ABC 7)

LOCKPORT, Ill. (WLS) — A family in Lockport said strange sounds, including music and talk radio, has been coming out of their walls and keeping them up at night off and on for about six years.

“There are voices in the wall and I don’t know what it is,” said 9-year-old Brianna Smith.

It may sound like an episode of the popular Netflix show “Stranger Things,” but the mysterious sounds Brianna is hearing are real.

“It has been waking me up at night,” she said.

The sounds are coming from the bedroom walls of her home in the middle of the night.

“It kind of keeps us up at night,” explained Brianna’s father Richard.

Richard said the family doesn’t have any speakers in their walls. He captured some of the late night noise on his phone and sent it to the ABC7 I-Team. The music was faint, but the I-Team could hear it.

“It’s one of our favorite songs, but not at 10 o’clock at night,” Richard said.

Richard Smith called Lockport police, who took two detailed reports about the bizarre problem. In one, the officer noted that he could hear “voices and music” and “talking about Christ.” Then the officer said he heard a commercial for the Christian radio station AM 1160.[…]

The Surprising Way Solar Storms Can Beach Whales (Spaceweater.com)

Space weather isn’t just for humans. Whales are experiencing it, too. A new study published this week in the research journal Current Biology shows that solar storms can confuse whales and cause them to strand on beaches–and the mechanism is surprising. Get the full story on Spaceweather.com.[…]

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Sporadic E on the Red Planet

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(Source: Inverse)

Thanks to NASA’s Mars Atmosphere and Volatile EvolutioN (MAVEN) mission to Mars, you may soon never need to fiddle with the tuning dial on a car radio again.

When we listen to songs on the radio, the sound travels via radio waves that are given out by a transmitter and then received by a receiver — in the case of a car, the car’s antenna is the receiver.

Radio waves travel in the form of electromagnetic radiation from one antenna to the other. The journey, however, isn’t always perfect.

Sometimes, there is a sudden spike in the amount of hot gas in the upper layer of Earth’s atmosphere which causes interference in radio communications. If you are tuned into a favorite station, that could result in static, or for one radio station to be replaced by another.

This phenomenon, known as sporadic E layer, is difficult to study on Earth because that part of the planet’s atmosphere is hard to reach with satellites. As a result, scientists can’t predict when they will occur — leaving us to fiddle with dials.

But thanks to MAVEN, a spacecraft traveling 300 million miles away from our planet, we could finally have the solution.

MAVEN detected sporadic E layer in Mars’ upper atmosphere, and scientists are hoping to be able to use the Red Planet as an off-Earth laboratory to study the phenomenon up close. Already, the data have provided new insights into the cause of radio static, which also affects communications with aircrafts and military radars.[…]