When I see specs like that it always makes me think that the manufacturer does it on purpose to limit their liability, knowing that almost nobody is going to actually going to follow the print. The e
Well, first off, I wasn't in any way suggesting that he should do anything different than UST recommended. In fact, I'm not sure how anyone would get zoning inspection approval if they didn't follow
I do a similar thing, but I have a suggestion that may make it simpler and cheaper for you. Drill holes in one face of an 18 inch length of angle iron spaced to accept the bolts from a saddle-type mu
I don't think that is likely. I found several eBook web sites that triggered a response to a Google search on that title, and they all did the same thing. They all referenced the title but didn't act
That's one good reason for it. Another is that in the case of only one yagi, mounting it vertically puts all the elements in line with the tower/mast, potentially causing unwanted electrical interact
That's not what he asked. He asked why hams orient yagis horizontally rather than vertically ... not why they use vertical polarization on some bands versus horizontal on others. Dave AB7E __________
Same thing I was wondering. I went out of my way to paint my tower and yagis with dark camouflage colors to make them less obtrusive for the neighborhood, and everything is four acre parcels here. Ch
Yeah ... that's the one. I built a mast raising fixture with it a couple of years ago, and as Chris says the worm gear (which appeared to be hardened steel) just plain ground off the teeth on the rin
Just about anything will stand out against the sky, but in general flat dark colors are the least noticeable. I used to live in the middle of Scottsdale and I spent a lot of time looking around while
History is full of examples of things that worked just fine right up until they didn't. Good engineering is what tries to provide you with enough safety margin to keep you from becoming one of them.
I'm kind of confused about all this discussion involving the use of a plumb bob, which I think would be impractical in most environments. It seems to me that there are two considerations at hand: 1.
I live in far southern Arizona (lots of butt-kicker summer thunderstorms) and not too long ago our local electrical utility was offering a pretty good deal on a whole-house surge suppressor package t
I bought some 3 inch and 4 inch irrigation tubing from a company called Rain-for-Rent, which is a large irrigation supply company with outlets across the U.S. The stuff I bought was .072 if I remembe
Sorry ... typo. The thinner stuff is about .050 Dave AB7E _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.c
When I plumbed the base for my 70 foot freestanding tower I used one of these gadgets: http://www.wixey.com/anglegauge/index.html I checked it six ways to Sunday beforehand and found it to be way mor
It's actually quite simple ... you just make sure all three legs are at the same angle. That assumes, of course, that the tower is straight, which I accomplished with a taut string as described in an
Even simpler and more convenient, in my opinion, is to use barrel connectors through a grounded bracket. I have one at both the top and bottom of my tower. http://ab7e.com/AB7E_Antenna_Page_4.html (b
That's the concern I would have about using a circular saw and abrasive blades to cut tower legs that are under compression. Cutting legs under tension would theoretically be safer, except that as so
Look at it this way ... the magnitude of arcing you get across the end of the coax if you don't have the antenna DC-shorted to ground is rather tiny. My experience over the years (when I had a dipole
That doesn't pass my perception of the physics involved. How does bleeding static from the clouds not initiate an ionized path itself? It seems to me that's like sticking a pin in a balloon to let ou