Dangerous Prototypes @dangerousproto
Variable RF signal sampler goo.gl/f7vIMM
Yesterday evening, maxp tweeted:
Engineers refer to measurements in dB all the time. Here’s a refresher on decibel basics. edn.com/design/test-an…
It’s currently available for streaming on Netflix, and I watched it tonight. It’s kind of violent (lots of people get shot), but it’s a decent thriller.
Jim, K6FWT, notes, “These folks are SERIOUS enthusiasts. I have heard that they surpass many intelligence services with their thoroughness. You can get in up to your eyeballs if you don’t watch it.”
Your life work series: radio and television (1940). If this was 1940, this video would show you how to get into the radio and television business.
One-transisitor regen receiver. This video shows you how to make a simple one-transistor AM radio.
WWV: All the time, all the time. What more is there to say? (Courtesy Brad, AA1IP and the Glowbugs mailing list)
The sound of Heil. He saved tours of the Grateful Dead and The Who, and is credited with the birth of modern live sound by revolutionizing the equipment that bands used, starting in the 1960s. In fact, Bob Heil, ham radio operator, sound equipment inventor, and founder of Heil Sound, is the only manufacturer to have equipment on display at the Rock and Roll Hall of Fame.
Ham ops win iAEM-Global technology & innovation award. Broadband HamnetTM, developed by amateur radio operators to provide a high speed digital wireless communications mesh network, has won the IAEM-Global Technology & Innovation Award, Division 2.. The firmware is available at no charge via the project website at www.hsmm-mesh.org.
The teenage radio enthusiasts who helped win World War II. There were about 1,500 so-called voluntary interceptors during WWII – civilians helping to intercept secret Nazi code. To mark the centenary of the Radio Society of Great Britain, one of its members recalls how the amateur organisation played a key role in a covert operation to safeguard the country’s independence.
UNESCO’s World Radio Day was yesterday, February 13. I know I’m a day late with this one, but there’s still some interesting information to be communicated. The World Radio Day website notes,
13 February is World Radio Day — a day to celebrate radio as a medium; to improve international cooperation between broadcasters; and to encourage major networks and community radio alike to promote access to information and freedom of expression over the airwaves.
While it’s mostly about radio broadcasting, amateur radio does get a mention. In the article, “Shortwave Broadcasting – Challenges and Opportunities,” the author, Oldrich Cip, says,
Amateur radio enthusiasts have traditionally used shortwave communications to share information during emergencies when other communications systems fail. This practice is recognised and appreciated both by the public and the regulating bodies responsible for managing radio frequency spectrum. In contrast, professional broadcast facilities, whose transmitters are 10 to 100 times more powerful than those of amateur operators, are rarely used in emergencies.
As an aside, Cip is the director of the High-Frequency Coordinating Committee (HFCC). The goal of the HFCC is to coordinate shortwave frequency use and minimize broadcaster interference. Their website has some interesting information, and is worth a look for those of you into SWLing.
Here are three interesting items that I found out about by reading my e-mail:
Thanks to my latest donor, Kent, K4AHU!
Kent says, "I, and some of my ham friends, have recommended your fine No Nonsense Guide to many of my friends throughout the Florida Panhandle. To date, almost 100 have obtained that Technician license or used the other guides to attain a higher class license."
Donate $5 and get this cool sticker. Measuring 5-3/4-in. W by 4-1/4-in. H, it's perfect for your car, your shack, or wherever!
A reader just wrote, "I just wanted to drop you a note and let you know that the study guide is perfect. I'd been looking for something between studying the question pool (and learning nothing outside the specific questions) and the ARRL guide (which, while a great resource, isn't a great study guide). I found it!"
My No-Nonsense Study Guides are now available as a PDF file or as as an e-book for either the Amazon Kindle or Barnes&Noble Nook. The PDF version of the Tech and General Class study guides are free. There is a small charge for the e-book versions and for all versions of the Extra study guide. See the Study Guide page for more details.