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Many thanks to SWLing Post contributor, Troy Riedel, who recently shared his observations about low self-discharge batteries with me. He has kindly allowed me to post his message here on the SWLing Post. Troy notes:
I’ve lauded Tenergy rechargeable NiMH batteries and I wanted to share something with you.
Mighty Bright Navigation Light
I have a box of Mighty Bright combination Red & White LEDs that I use for astronomy (they’re a clip-on light used by pilots and also marketed for use in the automobile – they hold three AAAs).
Approx. 18-months ago I put fully charged Rayovac, Energizer, Eneloop & Tenergy Centura Low Self-Discharge batteries in them.
Last night I pulled them out.
Rayovac: 0% charge. Energizer: 0% charge Tenergy Centura LSD & Eneloop: both averaged ~ 70% of a charge … (6 batteries in two lights) … though some of the Eneloops had a slightly higher charge (maybe 2 – 5% higher), most of the batteries were virtually indistinguishable.
You can buy 8 Tenergy for $9.99 while 8 Eneloop cost $17.99.
If cost were not an issue I’d still go with Eneloop (a longer track record), but the Tenergy is a worthy – no, very worthy – value vs. performance choice.
Panasonic Eneloop batteries
Thanks for sharing your real-world feedback, Troy.
I’m a big believer in low self-discharge rechargeable batteries. Indeed, I’ve almost replaced all of our “legacy” (meaning not low self-discarge) NiMH AA and AAA batteries with Eneloop cells.
Eneloops are pretty pricey, though, and the costs add up if you have a lot of devices that require batteries. As you might imagine, portable radios demand a steady supply of AA batteries at SWLing Post HQ.
I’ve been very pleased with my Eneloop batteries and, frankly, haven’t switched brands because of the terrible luck I’ve had with “legacy” rechargeables in the past. I’ve purchased so many that worked wonderfully for a few months then began to lose their capacity even though I employ an intelligent charger that properly breaks-in and cycles them.
I do believe I’ll add some Tenergy AA and AAA batteries in the mix now–especially for non-radio applications like lighting, remotes, clocks, and other consumer electronics.
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’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors, William Lee, Stana Horzepa, Rich Cuff, and Marty for the following tips:
This iconic Los Angeles landmark has been emitting secret messages since it opened. However, only those with a keen eye for Morse code can decipher what they say.
It was the former president of Capitol Records, Alan Livingston, who got the idea to have the light on top of the building send out a signal in Morse code. The word chosen for this secret message was “Hollywood.” When the building opened in 1956, Samuel Morse’s granddaughter Leila Morse had the honor of turning the light on.
Some are interpreting this as meaning that – every – AM will be switching to digital leaving a Jillion AM only receivers with nothing to listen to (except for electrical gizmo noise). I give more credit than that to the owners of AM Radio Stations. I would highly doubt if any market would see all of their AM’s go digital. Perhaps in an ownership that had two AM’s it might make sense to have one of each.
[…]Other question is, what will the company that owns HD Radio (EXPERI) want to extract from the owner of an AM station that’s willing to put everything on the line and go all digital?
The bottom line is there appears to be a lot of interest in this proposal. The FCC’s process will likely draw a number of comments, pro and con. This will be an interesting process to watch. I can say one thing, never did I ever dream that we would be debating this issue![…]
Numbers stations—shortwave radio transmissions of monotone coded messages—are inherently creepy. But call sign UVB-76 has outcreeped them all by playing the same jolting tone from Russia since 1982. Similar broadcasts are useful for sending messages where snoops might intercept digital comms, so “the Buzzer” could simply assist spies. But it plays far fewer words and digits than confirmed espionage outlets, so some suspect it’s a science project that bounces radio waves off the ionosphere to detect solar flares. The most intriguing theory posits that it’s a doomsday device that will go silent should Russia suffer a nuclear attack, thus triggering retaliation.
My theory is that these mysterious sounds are actually the intro to a Pink Floyd song, possibly from their 1969 album Ummagumma. Because the early Floyd albums, before Dark Side of the Moon, are no longer heard on-air, the Russians stole this music knowing we’d never notice. Ooh, gotta go… I hear the black helicopters coming…[…]
When iHeartMedia announced this month it would fire hundreds of workers across the country, the radio conglomerate said the restructuring was critical to take advantage of its “significant investments … in technology and artificial intelligence.” In a companywide email, chief executive Bob Pittman said the “employee dislocation” was “the unfortunate price we pay to modernize the company.”
But laid-off employees like D’Edwin “Big Kosh” Walton, who made $12 an hour as an on-air personality for the Columbus, Ohio, hip-hop station 106.7 the Beat, don’t buy it. Walton doesn’t blame the cuts on a computer; he blames them on the company’s top executives, whose “coldblooded, calculated move” cost people their jobs.[…]
Amateur radio enthusiasts have proved themselves useful during the recent bushfires after traditional telecommunication channels broke down.
Amateur radio, also known as ham radio, is a skill and international hobby whereby enthusiasts use specific radio frequencies to communicate with each other.
In Australia, users must complete an exam to obtain a license through the Australian Communications and Media Authority (ACMA).
It was volunteers with these skills who were called in to assist during the recent New South Wales bushfires.
Neil Fallshaw is vice-president of WICEN NSW Communications, a group of volunteers with amateur radio licenses who can help in emergency situations.
He said about 30 members provided a temporary radio system in the Bega, Cobargo, Narooma, and Bermagui areas after some of the local radio infrastructure was damaged or had lost power.
“We deployed one of our radio repeaters on the mountains. We put a radio repeater system on that mountain to cover a portion of the south coast,” Mr Fallshaw said.
He said that radio system assisted the NSW Volunteer Rescue Association and Bega Valley Shire Council staff to communicate from bushfire-affected towns like Bermagui and Cobargo.
“They normally use just mobile phones, but the mobile phones in the area were down because of fire damage,” Mr Fallshaw said.[…]
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’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors, Mike Terry, Troy Riedel, and Jeff Murray for the following tips:
On this week’s episode we learn about a brand new project at the Library of Congress that is focused entirely on archiving podcasts. Ted Westervelt, Manager of the Podcast Preservation Project at Library of Congress, joins us to share early details from this new initiative. He explains that the hope is that a wide variety of all types of podcasts will be part of the collection, including the Radio Survivor Podcast.[…]
Coast to Coast AM founder Art Bell has been honored with a memorial plaque at a park in the Nevada city of Pahrump. The beloved radio personality, who passed away in April of 2018, was a longtime resident of the community and famously broadcast from his home there. The marker, which was unveiled by Nye County on their Facebook page this past Friday and is located at Calvada Eye park, was funded by a group known as the ‘Friends and Fans of Art Bell’ with additional financial support and installation provided by the county.[…]
A new analysis shows that “severe” space super-storms happened 42 years out of the last 150, and “great” super-storms happened 6 years out of 150. These storms can disrupt modern electronics, aviation and satellite systems and communications.
A new joint study by the University of Warwick and the British Antarctic Survey used historical data to extend scientists’ previous estimates of the likelihood of space super-storms. These storms may originate with solar flares, seen to erupt explosively on the sun during years of high solar activity. Space super-storms aren’t harmful to humans, because our atmosphere protects us, but they can be hugely disruptive to our modern technologies. They can cause power blackouts, take out satellites, disrupt aviation and cause temporary loss of GPS signals and radio communications, scientists say. The new work shows that what the scientists called “severe” space super-storms occurred 42 years out of the last 150 years. What they called “great” super-storms occurred in 6 years out of 150. The new work also sheds light on what’s called the Carrington event of 1859, the largest super-storm in recorded history.[…]
And that, my friends, is a HOMEBREW transceiver. Wow, amazingly well done. After I showed this to Pete N6QW (no slouch in the homebrew packaging department), in frustration with his self-perceived shortcomings he threatened to give up on homebrewing and to throw away all his rigs. Don’t do it Pete!
Peter Rachow, DK7IH has carefully documented his project through as series of blog posts: Here is Part 1. Part 9 deals with mechanical construction, packaging and what George Dobbs used to call “socketry.”[…]
This weekend Encore – Classical Music on Radio Tumbril will be broadcast again at the NEW TIME in Europe of 11:00 UTC on SATURDAY on 6070 kHz by Channel 292.
There is much less interference from adjacent channels at this time.
There are two repeats – 19:00 UTC Friday on 6070 kHz and 09:00 UTC on Sunday on 7440 kHz by Channel 292.
NORTH AMERICA:
WWCR Nashville will broadcast the Encore on Saturday at 21:00 UTC as usual on 9350 kHz. The propagation is very good over the US and much of Canada and the signal carries to parts of western Europe too.
WBCQ Maine will send out the show on 7490 kHz at 01:00 UTC Monday to the US. (Early evening Sunday local US – obviously.)
Do let us know how well you can pick up Encore at your location by emailing to [email protected]. We try to reply to all emails and will send eQSL cards for full reports – though a brief report is fine.
This week’s programme will start with the Act 3 Prelude to Wagner’s Parsifal, then another – very different overture – William Tell by Rossini. Some of a flute Sonata by Paul Hindemith next, then Chopin, a double bass concerto and some music from Greece.
Monteverdi’s vespers, a Schubert piano work, and late Beethoven Quartet finish the programme.
The playlist is on the website and will be updated soon after Saturday’s broadcast of the new show by Channel 292 at 11:00 UTC – but probably not until Sunday evening.
Both Channel 292 and WBCQ as well as WWCR can be pulled live off the internet if the reception is poor in your location. Easy to find their sites with a google search.
In the meantime – thank you for spreading the word about Encore – Classical Music on Shortwave. And thank you to everyone for letting us know how well the signal is received where you live.
Brice Avery – Encore – Radio Tumbril – www.tumbril.co.uk
Regular Broadcast times are:
11:00 – 12:00 UTC Saturday on 6070 kHz and repeated 19:00 – 20:00 UTC Friday on 6070 kHz Channel 292 (Germany) and 09:00 UTC Sunday on 7440 kHz.
21:00 – 22:00 UTC Saturday on 9350 kHz WWCR (Nashville).
01:00 – 02:00 UTC Monday on 7490 kHz WBCQ – (Maine).
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’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors, Mike Terry, Troy Riedel, andGrant Porter for the following tips:
SOMERVILLE – What started as a midnight to 6 a.m. slot on a failing classical music station, became the voice of a generation in 1970s Boston. Now, more than 50 years after WBCN sparked a “revolutionary new experiment in radio,” the bygone rock station is still making waves.
The 2018 documentary, “WBCN and The American Revolution,” tells the origin story of Boston’s first rock and roll station through a combination of rock hits. Never-before-seen photos, videos and interviews with some of Boston’s most beloved radio hosts, were greeted with cheers at the Somerville Theatre screening Thursday night.
Bill Lichtenstein, who began volunteering with WBCN at 14, directed and produced the film. After crowdfunding and a decade in the making, it has been touring independent theaters and festivals across the U.S. for the last year and a half.
WBCN was grounded in good music. Founded by Ray Riepen, owner of South End music venue The Boston Tea Party, WBCN introduced voices like The Velvet Underground, The Who, Bruce Springsteen and Led Zeppelin to the city, and quickly found a home in Boston’s huge student population. Within three months, the station, run by amateur hosts and young volunteers during classroom breaks, was playing 24 hours per day.[…]
What people are saying to the FCC about all-digital on the AM band
Radio World is providing an ongoing sampler of comments of what people are telling the FCC about its proposal to allow U.S. stations on the AM band to switch voluntarily to all-digital transmission. Here are more in the series:
Kirk Mazurek told the FCC that he is an avid AM listener who has “invested time and money in equipment towards my hobby as many others have. If this proposal goes through it will make the millions of receivers obsolete requiring the purchase of new equipment. This is needless, there are a lot of people who have vintage radios and a lot of them have been restored. This proposal would make them useless. I urge you not to ratify this proposal.”
Mark Wells raised concern about interference from digital to analog signals on the same channel. “This is especially applicable at night when one is listening to distant stations in out-of-state markets, he wrote. “For example, clear channel stations WBT in Charlotte and KFAB in Omaha are both on both on 1110 kHz. Let’s say one switches to digital, and one does not. As it is they both may fade in and out as the atmosphere does its nightly tricks, but the signals remain mostly useable. But, if one is digital and the other analog would it not ‘blank out’ the analog station?”[…]
There was a time when the airways bristled with Morse Code. There were commercial radio stations all around the world whose business was sending and receiving Morse Code messages to ships at sea. Coast station KPH, located at Point Reyes National Seashore near San Francisco, is one of those stations. Richard Dillman was there in 1997 when KPH sent it’s last message and closed it’s doors. It was the end of the line for the men and women who had spent their careers sending Morse Code to ships at sea. There was nowhere else for them to go…
Two years later, Richard Dillman with a group of volunteers returned to KPH and put it back on the air. Listen as Richard tells us about the future of Maritime Morse Code Coastal Station KPH!
SpaceAustralia.com have recently been hosting a community science project that involves encouraging teams to build backyard radio telescopes that can detect the arms of our Milky Way Galaxy by receiving the Hydrogen line frequency of 1420 MHz.
This can be achieved at home by building a horn antenna out of cardboard and aluminum foil, and a feed from a tin can. Then the Hydrogen line and galactic plane can be detected by using an RTL-SDR, LNA, and software capable of averaging an FFT spectrum over a long period of time.
While most horn antennas are typically made from four walls, one participant, Vanessa Chapman, has shown that even trash can be used to observe the galaxy. Vanessa’s horn antenna is made from multiple cereal boxes lined with aluminum foil and an old tin fuel can. The boxes are held together by some string and propped up by some sticks.
With her cereal box horn antenna combined with an RTL-SDR Blog V3, and an RTL-SDR Blog Wideband LNA, Vanessa was able to use software to average the spectrum over time as the galactic plane passed overhead, revealing the Hydrogen line peak and corresponding doppler shift from the galactic plane.[…]
