Posts Tagged ‘uhf’
Thinking back to when I was a kid, I used to love riding my bike. My friends and I would get up early every morning and go riding our bikes for about an hour before school started. Then after school we would leave and ride our bike for another two hours or so until it was time to go home for supper.
I wasn’t a ham back then, but I sure loved that bike. Fast forward a few years to my junior year of high school when I got my ham license. I didn’t ride my bike so much anymore, because I didn’t live in town anymore and would’ve been a seven mile ride to and from school and on roads that probably were not the best roads to ride on.
I did start to merge the hobbies somewhat around this time though, however it isn’t anywhere near what Mike and the rest of his club does on theirs. I would clip an HT to my belt and the speaker mic to my shirt and that was the about it.
In today’s episode, Mike talks with me about how he does it, how he operates while being Bicycle mobile. We talk about some of his experiences and some contacts he has made.
This is Episode #186 of Linux in the Ham Shack. In this episode, topics include driving while using your amateur radio in Canada, UHF regulations in The Netherlands, amateur radio testing, Samba, tickr, Arch Linux, GeckoLinux and a whole lot more. Thank you so much for listening. We appreciate each and every one of you.
73 de The LHS Crew
Here in Manhattan, the highest point above the hustle and bustle, is the Empire State Building. Or, it was at least until yesterday. As of April 30th, 2012, the new One World Trade Center is officially the tallest building in Manhattan. As I listened to the news yesterday morning this got me thinking about the antennas on the Empire State Building, and the logistics and history of them. For those of you fascinated by these things, here are a collection of resources to consult, and some of what I learned about the tallest antennas in the city.
I found a great article on the history of the TV mast at www.lnl.com/esbantennas.htm. The TV antenna portion was originally a mooring mast for dirigibles which was re-purposed 8 months after the building was completed in 1931. The article was a reprint from Broadcast Engineering magazine, August 1967. The mooring mast, which was part of the original design of the building, was supposed to be used by passenger airships for anchoring, while the passengers disembarked down a gangplank to the 102nd floor. In reality, this proved to be unsafe, as the updrafts and other air currents around the building would not allow for safe mooring. Only one dirigible ever successfully anchored to the mast after a 30 minute ordeal with mooring ropes, and even then was only able to stay anchored for 3 minutes. The first entity to transmit from the re-purposed mast was NBC who began experimental TV transmissions from the ESB in December of 1931. For you fans of TV’s Fringe, the sequences shot in the alternate universe, show modern dirigibles moored to the Empire State Building, as well as a skyline that still contains the Twin Towers.
Here also, is another great article; from CQ Amateur Radio, March 2011, Digging Deeper With Bill Baker, W1BKR, where Bill visits the transmitter site for channel 13, WNET, in the Empire State Building. Great pictures of the mast, and of the massive filter network that all signals have to pass through first to reduce interference with each other.
Today there are over 130 antennas on the Empire State Building at various heights. This site lists the options available to anyone interested in locating an antenna up there. I’m not sure how many Amateur Radio repeaters are on the building as of today, but one I know for sure is KQ2H. KQ2H has a large linked network of repeaters that give it incredible range, including a 10 meter input up in the catskill mountains. I can listen to the ESB 220, 440, and 900 repeaters from my desk at work, and get an idea of what’s going on with 10 meter propagation by taking note of where the incoming stations are. Lately I’ve been hearing hams from Australia and New Zealand hitting the repeater late nights between 8 and 10 PM EDT. KQ2H’s 10 meter FM machine transmits on 29.620, and listens on 29.520. It is usually available on EchoLink, although the link has been down lately. On EchoLink you need to search for the callsign W2FLA which belongs to the linked 2 meter repeater in the system up in the mountains.
Many of these entities that have antennas on the ESB, relocated there after the Twin Towers fell in the 9/11 disaster. I was looking for antenna leasing info for the new One World Trade Center building, but nothing seems to be posted yet. There is definitely going to be an antenna structure on the top of the building though. I’d love to take a couple of radios up to the ESB observation deck sometime, but I hear the officials can be a little touchy about these things (understandably so). As I learn more about One World Trade Center I’ll post it at a future date.
Does anyone else out there have stories about antennas on skyscrapers (like the former Sears Tower in Chicago, or even the CN Tower in Toronto)? Leave some info in the comments. 73.
Today the guys delve deep into their geek pockets and come up with a couple of fairly advanced networking topics. One is ham radio related, the other is everything related. Don’t be scared off, however, as the discussion is a 10,000-foot overview of these technologies and how they will be important in YOUR future. Russ tackles IPv6 in a generic way, discussing using it with Linux, and gets on his soapbox about how everyone should already be using it.
Richard discusses a wireless technology called HSMM or High-Speed Multimedia. This is a networking technique that blurs the line between FCC Part 15 and FCC Part 97, but gives ham radio operators some new and exciting things to try with their off the shelf wireless gear. HSMM has some nice features and will definitely earn you your Boy Scout Geek Cred Badge if you decide to dive in.
Thanks as always to our listeners, present and future. Comments and questions, make sure to send them our way. Donations are also appreciated. If you want to promote yourself, your ideas or your projects, leave us an intro to the show at 1-909-LHS-SHOW. Stay geeky!
Richard is back and everything is right with the world--except Russ. Plans are in the works for setting up at the Dayton Hamvention. Many thanks to all of our listeners who donated to the cause. Our next donation goal, is $150 to get a noise gate for Richard. We know at least a couple listeners who should be happy about this, and we suspect there may be a few others out there. Of course, we're committed to improving the quality of the program whenever and wherever possible.
This episode is a little heavy on the radio side of things. However, don't be deterred. Richard gives us a lot of great information about satellite technology, concepts such as Doppler shift, transponders, antenna polarization, the science of orbits and much more which will appeal to your inner geek whether you're into ham radio, computers or just science and technology in general. Have a great week, and we look forward to seeing everyone in the chat for the next live recording on Tuesday, March 2nd.