Yeah, the contractor padded the estimate. Further, it was a big housing contractor, not a poor, struggling tower rigger ;-) They made a pantload of money on a major renovation to my house, so I didn'
A friend of mine has a 2-stack of TH7s, with the lower one on a TIC ring. The StackMatch is roughly in the middle between the two beams. The phasing line for the lower feedline comes straight down th
I'm putting in 4d anchors for my 110' Rohn 55 tower. I'm confused by Rohn's rebar specification for anchor footings. From the drawing in the catalog, it looks like they only require rebar for the top
My comments embedded: Our local code says separate conduits must be used. I can't imagine using metal conduit. I used PVC. Not the white schedule 40 plumbing stuff, but the grey stuff specifically de
This worked great on my 265' runs. You have to attach a "mouse", which is a disc or ball made of foam rubber, to the leading end of the string. _______________________________________________ _______
I read somewhere, I think in Polyphaser's documentation, that the need to connect the tower ground with the shack ground and service entrance ground depends on the distance between them. As I recall
Well, some of us have to do it. My crankup tower is 265' from the shack behind a tall stand of trees. If I squint real hard, I can sometimes see one of the antenna elements through the foliage. But m
Try Hill Radio Communications: www.hillradio.net. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http:
Hi all, At long last, the concrete is in the ground for my 110' Rohn 55 tower! Whew, that was a lot of work. And a lot of concrete -- 8 yards. I went with 4d anchor specs, which doubles the hole size
Larry, Looking at the turnbuckles this morning, it certainly seems more likely that the bottom threaded shaft would bend before the anchor rod, which is a much bigger piece of steel. If the shaft ben
If the consensus is to bend the rod, then I'll try it by hand first. As for the angle, we had a heck of a time lowering the downhill anchor much below 45 degrees. I think if we'd gone to spec, 42 deg
Following up on my previous post, the overwhelming consensus was to bend the misaligned anchor rod. This turned out to be much easier than I expected -- I could have done it with one hand. It also to
My new tower will have three 4-el SteppIRs, three TIC rings, a T2X, a stack match and an SO2R switch box. That comes to 96 control wires. Since the tower is over 200 feet from the shack, it's best to
No, I'll need 24 of them -- one at each end, tower and shack. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesti
Not a bad idea for a single array, but probably not physically practical for the complex system that will be hanging off my tower. All of the controllers can be operated via RS-232, so that's not the
Several people have responded saying I don't need suppressors at both ends. I agree that the critical place to put them is at the shack end. My reasoning for putting another set at the tower is that
I recently used the method suggested by Gene and it works well. I used sheet rock screws instead of nails, but the idea is the same. Basically, you're using the wires to "guy" the rebar cage in place
Hard to give any meaningful advice. You haven't told us the tower model, it's height or construction. Is it lattice or tubular? You haven't told us the windload rating of the antennas or what bands t
I remember looking into this at one time. I don't recall the source of my information, but I think my MA-770MDP derates to something like 2 sq ft of windload at 90 MPH. Again, that 15-20 foot mast ch
If your neighbor is cooperative, an easement sounds like just the ticket. You can probably have it run for 35 years and then expire. _______________________________________________ __________________