The parasitic Lindenblad, that is. I wrote in a previous post about how I was gathering the parts to build the parasitic Lindenblad antenna for 70 cm that appeared in an article in the February 2010 QST magazine. Since then, I’ve actually managed to build one of these beasts, and for what it’s worth, it even looks like the one in the picture in the article. My first trial with it on a good pass of AO-51 was less than impressive, though. For this trial, I used my Kenwood TH-F6A connected directly to the antenna with a three-foot section of RG-8X coax (to minimize the effect of feedline losses, which can be appreciable at 70 cm). There were moments when I had good copy on the satellite, but they were few and far between. I was a little disappointed, but I wasn’t ready to give up yet. Knowing that the antenna, being more-or-less omnidirectional, didn’t have much gain (especially compared the the handheld Arrow Antenna yagi I’d been using), I wondered if a preamp might be necessary.
A few weeks ago I posted about a new Chinese ham radio satellite, and mentioned a couple of satellite antennas I was considering building. Just a few days later I found the latest QST magazine in my mailbox, complete with an article about (you guessed it) another ham radio satellite antenna project! This one, by AA2TX, describes an antenna he calls a parasitic Lindenblad (here’s a link to an AMSAT article). The antenna, for 70 cm, is right-hand-circularly polarized with an omnidirectional radiation pattern. This makes it well-suited to amateur satellite applications. I liked this design better than some of the others I was considering, so I decided to give it a whirl.
When shopping for a new car, a ham isn’t thinking about performance, color, or gas mileage. Instead, he’s asking himself, “Where can I put the ham radio?” It’s not that a ham will necessarily disqualify a car from consideration based on the ease with which a 2-meter rig can be installed. Rather, he looks at it more as an interesting engineering challenge–the more interesting, the better. After all, if it were easy, it wouldn’t be interesting, would it?
I certainly made things interesting for myself last week when I purchased a 2007 Pontiac G6 GT hardtop convertible. It’s quite a car–200-hp 3.5L V6 (not overwhelming, but adequate), power everything, heated leather seats, awesome Monsoon sound system with XM radio and a 6-CD changer–it’ll be nice and comfy for my half-hour-each-way daily commute.
On 15 Dec 2009, AMSAT China launched a new amateur radio satellite, now designated as Hope Oscar (HO) 68. This satellite not only has a V/U FM repeater but also a V/U linear transponder for SSB and CW as well as a packet BBS system. This one should be great fun to work. Here’s a Youtube video giving the details:
Now I really need to get crackin’ on that backyard satellite antenna–maybe W4RNL‘s turnstile antenna (from the Aug 2000 QST), or W6NBC‘s quadrifilar helix antenna (from the Oct 2009 QST). Or maybe it’s time to concoct that servo-driven crossed yagi for auto-tracking the satellite…
“Recipients of gifts with sharp edges will draw their own blood within an hour of unwrapping.”
Guess what I got for Christmas!
You’d think I’d be old enough to know better by now…
I confess to a general loathing of antivirus software. For many years I ran Norton Antivirus on all my computers, gritting my teeth and forking over the subscription payment every year while wondering if it was worth it. And, over those years, Norton forced me to upgrade periodically or I wouldn’t continue to receive antivirus signature updates. Every upgrade was more bloated than the last and further degraded the performance of my computer. Norton and McAfee were in such a race for market share that their products were increasingly stuffed with “features” that I neither needed nor wanted. And never during this time did Norton ever report finding or protecting me from a virus. Was all this virus business just a bunch of hooey?
If you’re a regular visitor here on my blog, you’ve no doubt read about some of my ham radio backpacking adventures with Steve wGØAT and his goats Rooster and Peanut. It’s always fun to hoof it up the mountain with Steve and the boys–especially when Rooster carries the refreshments!
So, a few days ago I received a note from Steve announcing the opening of his new GoatWare shop on Cafe Press. Now you, too, can have your own “Old Goats Rule!” t-shirt, water bottle, or coffee mug! And if you’ve never seen the goats before, check them out on Steve’s Youtube channel.
I was getting ready to order a batch of coffee beans from my favorite coffee roaster, The Unseen Bean up the road from me in Boulder, Colorado. The owner and roaster is a visually-impaired man named Gerry Leary, whom I met a year or two ago when he came to visit with students at the Colorado School for the Deaf and the Blind (I’m on the board there). Really an impressive guy.
So I’m perusing his web site, deciding what to order, and I stumbled upon a roast called Contester’s Blend. The logo on the bag shows a dog wearing a radio headset! He also offers a blend called Kilowatt Dark Roast. I came to find out that Gerry’s a ham (WB6IVF) and he’s sold his coffees at Dayton.
Now, I’m no Starbucks snob, but the coffee I’ve gotten from the Unseen Bean has been pretty tasty stuff. If you enjoy fine coffee and you’re inclined to support a visually-impaired small business owner who’s friendly to hams, check out his web site.
I gotta say that my iPod Nano (4G) is really growing on me, much more so than I would have expected. I bought it last April, not long before my wife and I spent a week on a cruise ship in the western Caribbean. I hardly used it on the cruise, but now I use it every morning on my half-hour commute to work, plugged in to my car stereo and playing podcasts of Car Talk, Fresh Air, and Science Friday from NPR. I use it occasionally in my office if I need to drown out the office noise, and also when I ‘m jogging–the Nike + iPod Sport Kit is a cute little wireless pedometer that links with the iPod to help you collect data from your runs, and anyone who knows me knows I’m all about collecting data. I’m always on the lookout for new ways to use my iPod.
As promised in my previous post, I gave Ubuntu 9.10 (Karmic Koala) Netbook Remix a test drive on my MSI Wind U100 last night. The results were promising yet disappointing. Karmic Koala is clearly not ready for the MSI Wind, but I’m crossing my fingers that the situation will change soon.
Had I done a little research beforehand, I’d have discovered this in advance. The release notes mention two separate issues: one with USB, and the other with the screen flickering. Indeed, I experienced the screen flickering, which was enough (in my opinion) to render this version unusable. Hopefully that’ll be fixed soon.