Borrow a copy of every ARRL/RSGB publication with the word "antenna" in the title. Lots of thud power and it illustrates just how important antennas are to amateurs and amateur radio. 73, Dick -- Dic
Does anyone have any experience with 3M self-sealing shrink wrap for waterproofing coax connectors and splices? This stuff comes with an inner coating that melts when it gets hot and is supposed to c
Fred, I think what this proposes is that the common failure mode for a tall broadcast tower is a vertical downward crushing failure from excessive weight and other vertical stresses. With all guy sup
That last sentence got my attention. "May just be necessary to reposition the wiring across relay." When I first put my AL-1200 on the air, I had problems with instability on 10 meters. Ameritron tol
I posted the anecdote about my AL-1200 relay before reading Jose's final message. From that and a few others, it appears the T/R relay is a very weak link in Ameritron's amplifiers. I know Tom W8JI h
It depends. :) What are you worried about? Are you worried about pushing over your tower? Calculate the position of =least= wind loading. For a large multi-element yagi, probably perpendicular to the
"I replaced the loading-coil-terminal plated self-tapped screws with through the aluminum tube and secured the screws with safety nuts." Following these instructions, including the drilling and tapin
Rohn 25 specs call for their house brackets to support a minimum horizontal load of 815 pounds in ALL directions; toward the house, away from the house and across the face of the wall. In most if no
Plastic owls scare away what a real owl would scare away. Songbirds and hawks are not the natural prey of owls, so are unaffected. On the other hand, you won't have any trouble with mice or snakes on
Dave Leeson's structural mods to the 40-2CD have become almost SOP for this great antenna. His original article can be found at http://www.qsl.net/w6old/402cd.html 73, Dick -- Dick Flanagan W6OLD CFI
Perhaps it's just me, but if I had an array that required an Orion 2800 to turn it, I don't think I would want it on top of some Rohn 25! I guess that's my poor man's Reality Check. :) 73, Dick -- Di
Photos and a few comments on my Voyager at http://www.qsl.net/w6old/voyager.html 73, Dick -- Dick Flanagan W6OLD CFII Minden, Nevada DM09db (South of Reno) Visit http://www.cvrc.net/ -- FAQ on WWW:
This morning for the first time in the almost two years I've had my US Tower HDX572-MDPL installed, I was unable to raise the tower up because of what appeared to be excessively cold temperatures. Wh
That's what the Conventional Wisdom seems to be telling me (I'll summarize for the list later). Yes. I did have a slipping problem earlier this year, but by adjusting the four motor mounting bolts, I
I also sent my query to US Tower and received the following response: "Our engineering staff recommends a synthetic gear oil. We have a paper on the gear box with their recommendations, please email
Thanks, Bill. I think I will need to change the oil in the gear box. I found out yesterday that US Tower recommends a "synthetic gear oil" and as soon as I find out more from them, I will let the ref
Thanks very much, Tom. I will wait to see if US Tower has any specific "synthetic gear oil" recommendations. If not, I will ask the reflector for some specific recommendations. 73, Dick -- Dick Flana
Interesting. That had never occurred to me, but it sure makes sense. I will check that out next chance I get. By the way, by Noon the tower was able to go up just fine and it so happens that the way
It is very windy and dusty here. I would worry the entire greased surface would be quickly coated with abrasive grit! I need to think about that one. Perhaps someone else on the reflector can shed so