Here's an interesting new product that may be useful for amateur antennas. It's advertised as a WiFi product but may be helpful on ham frequencies. <A HREF="http://j-walk.com/blog/docs/wifispray.htm"
There'll be some info in a couple of months. N0AX and I are doing a third round of yagi tests including the SteppIR and a Tennadyne LP. I suspect that the SteppIR will be a tough antenna to beat give
That's a pretty dinky load and windspeed but nonetheless any 'custom' structure requires a PE design. Your choices are to go with a real factory engineered self-supporter or a guyed tower with close-
What is this for? Why do you think you need it? It doesn't sound like an FAA compliant lamp - they're 120V and 300 watters I'm pretty sure. Cheers, Steve K7LXC TOWER TECH - Professional tower service
You need the Rohn catalog - it's got everything in it. They're available from <A HREF="http://www.championradio.com">www.championradio.com</A>. Anyone contemplating putting up ANY tower would benefit
Actually Eric, N7CL, posted a really insightful email a couple of years ago on LP's and it changed my mind about their capabilities. Try <towertalk n7cl lp> in the List Search on <A HREF="www.contest
HREF="www.sommerantennas.com"> and What are you confused about? This is my personal opinion. The Sommer is an overly complicated design with as many if not more parts than a KT34XA (which is a good p
The AB-577 military mast set-up is just what you're looking for. Check the TT archives at www.contesting.com for lots of info on them. Go to the List Search and type in <towertalk ab-577>. Cheers, S
You didn't mention what your proposed windload would be. You might want to have a PE or engineering-type run some calcs on your proposed installation. You still need the windload info. Might be - it
For the complete story on HF verticals, get the book "HF Vertical Performance Test Methods & Results" by K7LXC and N0AX. We test eight HF verticals including ones from Hustler, MFJ, Hy-Gain, GAP, Cus
Well, it's not brain surgery so you can't screw up too badly. Get a backhoe or other piece of equipment to dig the hole. I always like to assemble the rebar cage on the ground and then have the backh
Stan's article was the first to address mast forces. But according to Dick Weber, K5IU, PE, Stan's article has some errors in it. Unfortunately he didn't elaborate on them or provide the proper equat
Two personal comments. 1) It's a VERY complicated structure with MANY parts. I don't specifically of any mechanical problems though. Figure a bunch of construction time. 2) If this was a good perform
right Actually the all-thread that is available at any hardware store is the same grade as the anchor bolts. US Tower doesn't supply J-bolts anymore; what you get are the anchor bolts with a nut weld
what Yep. The breaking strength of EHS (extra high strength) is 3900 pounds. Some galvanized and SS wire rope cable are in the same range so they'd be just fine as long as they meet the strength spec
Have Sure - put the rods in horizontally. You'll get most of a hemisphere of influence which isn't too bad. Just use more ground rods and you'll be good to go. Cheers, Steve K7LXC TOWER TECH
wanted My non-technical answer is that slump has to do with how 'stiff' the concrete is. That is, if you put it in a pile, would it stand up by itself (stiff with little slump) or would it run down (