Smith chart antenna-theory.com/tutorial/smith…
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…
Radio World: Shortwave Efficacy to Be Pondered at BBG radioworld.com/article/shortw…
- The Numbers Station. Released earlier this year, this movie starts John Cusack. Here is the IMDB description: A disgraced black ops agent is dispatched to a remote CIA broadcast station to protect a code operator. Soon, they find themselves in a life-or-death struggle to stop a deadly plot before it’s too late.
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.
- ENIGMA 2000. This group’s website describes the group as “a UK based online group, whose aims are to bring together listeners and enthusiasts who monitor and gather information on ‘Number Stations’ and other related radio transmissions. Through our Yahoo Group monitors can share their logs, discuss frequencies, thoughts and opinions on this most emotive subject.”
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.