has Bob, W7BA, does my rotator work and has a REAL simple circuit that only has a couple of components that'll give you a little brake delay. It's so simple I wonder why there are whole QST articles
The only authoritative on-the-air performance study done on triband antennas is the N0AX & K7LXC report. It's almost 80 pages of protocol, data sets, and summaries. We tested all of the above antenna
have It's pretty simple. What you can do is to use the rock as the base. Excavate down to the granite and then drill anchor bolt holes in the rock. You can either use expandable rock bolts or epoxy t
toward The rod should always point at the tower. The Rohn drawings have the specs; i.e. 42.8 degrees for a 100 foot tower @ 80% guying distance, etc. Grounding is slightly problematic. You can put th
Sounds great. And they're aesthetically pleasing - they just look like a big flagpole. Sound deadening? You mean the tower crank-up mechanism? The motor just whirs and once in awhile a cable creaks.
Sure - I've installed a bunch of them. The rotator plates mount either at the top of the section or 3-feet down. The plate angle brackets will only mount in one place so it shouldn't be too hard to f
QSL. I've only installed them and haven't lived with one so I haven't heard the aforementioned noise. Yes, these towers are steel contrivances with moderately big tolerances so there is a good chance
You mean Liquid Electrical Tape by Star Brite? It claims to be UV resistant but it dries up and flakes off anyway. At K5RC's place at 7,000 feet in NV, it mostly dried up and disappeared within a ye
Actually the drawings haven't changed in years (decades in most cases!) so a 1997 version is current. The aforementioned drawing is for a drilled pier but reflects the other configurations; i.e. 4-fo
There are 2 configurations: 1) rotator on the top of the tower and 2) rotator at the bottom of the tower as part of the MARB rotating tower system. It's obviously easier with the rotator at the botto
The tubular towers are easier than the lattice types - lay the tower over (after taking the antennas and mast off) and pull the sections apart to expose the cable connection; reverse the steps and yo
guys with During installation, the Preformed grips can be taken off twice which means they can be put on three times. The problem is that each time you take them off, some of the grit inside comes of
Preformed grips win every time. EASY to put on, fast to install, they don't loosen up, and you don't have to bend any EHS to do it. Clamps - ugh. They're a lot of work and can loosen up. Virtually al
Champion Radio Products - <A HREF="http://www.championradio.com"> www.championradio.com</A> - has some some carbon alloy steel tubing that's in-between as far as strength goes (1026=65 kpsi,.4130=110
First, towers and appurtenances are either covered as an additional structure or as personal property so your insurance company is typically on the hook in any case. Replacement value is something yo
10% may Hmm, I'm not sure what the question is. Of course the tension figures you mentioned are correct. Use the 10% spec for all guys regardless of size or location. Leg strength is the limiting fac
Some 3/16" galvanized wire rope cable available at any hardware store is plenty for 98% of ham jobs. Even smaller will work okay if you're not doing anything huge - i.e. big 40M beams, etc. Cheers, S