From my Twitter feeds: Smith chart, inkjet PCBs, SW books

imabug's avatarimabug @imabug
Smith chart antenna-theory.com/tutorial/smith…

 

make's avatarMAKE @make
Inkjet-printed circuits being shown at #sxsw. More to come. pic.twitter.com/ohLNzedwSk

 

hamrad88's avatarTom Stiles @hamrad88
TRRS #0252 – Books for Shortwave Listeners: youtu.be/rBFLkHP8RiU?a via @YouTube

From my Twitter feed: deep-space signals, making PCBs, SWL skeds

VoiceOfHamRadio's avatarVoice of Ham Radio @VoiceOfHamRadio
Radio Amateurs Receive Rosetta Spacecraft Signals from Deep Space zite.to/1nxMq2L via @Zite

 

hackaday's avatar

hackaday @hackaday
New post: [CNLohr] Demos His Photoetch PCB Process bit.ly/1a8TQpm

 

QSLRptMT's avatarGayle Van Horn @QSLRptMT
Still looking for winter shortwave schedules to compliment your listening ? Details at: mt-shortwave.blogspot.com

From my Twitter feed: spy tech, signal sampler, SWL guide

maximus_freeman's avatarmaxp @maximus_freeman
Interesting bit of RF engineering leaksource.files.wordpress.com/2013/12/nsa-an… (cc @kb6nu)

 

dangerousproto's avatarDangerous Prototypes @dangerousproto
Variable RF signal sampler goo.gl/f7vIMM

 

hamrad88's avatarTom Stiles @hamrad88
TRRS #0212 – Shortwave Listen Guide – eBook: youtu.be/RJxclPd1bLk?a via @YouTube

Halloween a pirate radio holiday. Who knew?

Yesterday evening, maxp tweeted:

maximus_freeman's avatar
maxp @maximus_freeman
Halloween: Pirate Radio’s holiday swling.com/blog/2013/10/h… #swl #swling h/t @SWLingDotCom
Who knew? Having just watched The Numbers Station and then hearing the CW numbers station 10115.5 kHz, I was ready to listen for some pirates.
There were a bunch of them on, too, in the MHz or so just below the 40m band. The first one that I heard was on 6925 kHz. I didn’t write down the details, though. Tuning up the band, I logged Wolverine Radio (GO BLUE!) on 6945  kHz USB. They were playing Alice Cooper’s “No More Mr. Nice Guy.”
Tuning downband, I logged XFM Radio on 6870 kHz, AM and then a Spanish-language station on 6880 kHz. Unfortunately, the station wasn’t strong enough to really get a good ID.
The strangest station I logged had to be the CW station on 6933 kHz. Here’s what I copied:
KPZL KPZL PUZZLE RADIO VAMPIRES ROAM ON HALLOWEEN NIGHT GHOSTS AND WITCHES GIVE US A FRIGHT BUT SCARIEST OF ALL AND SEETHING WITH SPITE IS THE WINGNUT FROM THE RADICAL RIGHT PUZZLE THIS…
What followed after that was a series of five-character code groups. Apparently, you were supposed to try and decode the rest of the message.
I gave the dial another spin tonight and logged a couple of different stations. There was a Slavic-language station on 6925 kHz LSB, My New Underpants on 6950 AM, and an Asian-language station on 6970 USB.
It’s interesting that the pirates use AM, USB, LSB, and even CW! I guess that’s to be expected. It is pirate radio, after all.
For more information, including loggings, check out:

From my Twitter feed: dB, SW, SSTV

EDNcom's avatarEDN.com @EDNcom
Engineers refer to measurements in dB all the time. Here’s a refresher on decibel basics. edn.com/design/test-an…

 

ke9v's avatar

Jeff Davis @ke9v
Radio World: Shortwave Efficacy to Be Pondered at BBG radioworld.com/article/shortw…

 

AMSAT_UK's avatar

AMSAT-UK @AMSAT_UK
ISS Amateur Radio Slow Scan TV Active wp.me/p2Mn4x-4Yk #amsat #hamr #iss #sstv

Numbers stations, revisited

I have written about numbers stations before (Uno, Dos, Tres…On the Internet – 11/26/12), but thanks to the guys on the Glowbugs Google Group, I now have some more information:

  • 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.”

Video: Radio & TV careers, regen radio, WWV

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)

Amateur radio in the news: Bob Heil K9EID, HSMM-Mesh wins award, teens help win WWII

Bob_HeilThe 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.

From my Twitter feed: WWV, smart meters, freeDV

SWLingDotCom
History of WWV and the NIST Time Stations http://t.co/xKWgOX0mwj #shortwave #swl #dx

Concerned about RF effects from smart meter? Check out http://t.co/mht0hvGSrP for technical analysis of meter signals

Been playing with FreeDV? Looks like some very recent improvements have been made. http://t.co/4MtGko4U75 #hamr #DV

Happy World Radio Day

UNESCO World Radio Day

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.