Jim, First of all, adding cold galv to galvanized steel is not necessary. No further protection should be added to galvanized steel. Secondly, what products are you using? When repairing old galvaniz
TTs: I received a callback from Tempo re: Aircraft Zinc Chromate Primer model A-7 6889 A Green It is available to commercial distributors by calling 800-845-2500 and setting up an account. Alternativ
Jerry, Take a look at the tradeoff analysis I have on my Website, specifically, the break-up insulator, Phillistran, and fiberglass rod implementations. I chose the fiberglass rod implementation in p
The formula Gene proposed is not exactly correct, nor does he precisely state what to do with the taper. Regarding the formula, Gene's thinking is: If you think of the wind as hitting the tube broads
"the integral from 0 to Dia of 1/2 surface area of each tube (0.5 x Pi x Dia), where Dia is the Outside diameter of the tube" This is because only one side of the tube is exposed to the wind at any t
No Stu, it wouldn't be precise. It would be the integral, as I stated. Your formula would result in a surface area exposed to the wind much larger than even Gene's calculation (especially, if his is
Hummm, I did not see that in his posting. 0.6 is the multiple for the approximation of the integral I proposed in my posting. Bill, N3RR shape is simply coefficient the effective projected flat "Stu
Chris, For the telephone wiring, use 4-pair, shielded cable and insert a K-Com filter *in the wall* at every telephone jack (in series with the daisy-chain, not in series with the outlet jack. That w
Dave, On my Website, I go into much detail on how to do this. www.erols.com/n3rr In the System Design menu, click on "Tower/Guy Anchor Rust Delay/Repair Subsystem " Bill, N3RR us to HREF="http://www.
Steve, I've installed them (5 of them) by myself, with only me on the tower, with a ground crew that hauled up parts as I asked for them. These were the large 1032 models. The smaller model 1022 shou
Steve, I should add that the key to the installation is preparation and practice *near* the ground before climbing to the final height on the tower. I suggest you pre-configure the parts on the groun
John, I have a F12 180C @ 149 ft with a 5 L HyGain 10M @ 145 ft. The 180C is *not* 180 deg, it is in line with the boom of the 10M. No problems and Tom Shiller says this is a normal config. The 180C
Jerry, If I understand your question... Attach the lower end of the comealong to the hole in the galvanized rod that the equalizer plate is attached to, using a shackle (or other similar device) of a
I used my DeWalt 12Volt XR, battery-powered drill while on the tower @ 134 feet to drill into a chrome-molly 3/16 inch thick, 2" O.D. mast. First, I drilled a pilot hole of approx 1/8 inch with a "us
My research into this several years ago revealed: Grade 8 are too brittle for tower applications. Grade 5 is the recommended grade for tower work. Bill, N3RR mechanically galvanized us to HREF="http:
Jerry, What's the yield strength as specified from the mill? That's the important number. You will loose about 20% in yield strength due to galvanizing. You'll also gain about .010 in O.D. if the gal
It's 28 Volts AC. Use bulb type 1819 (28V, 40mA) instead of 1820. They are readily available and are the original mfgrs. spec. Don't know where you got the 1820 bulb from, but my Telex HAM IV specs a
I have a HiGain/Telex HAM-IV that I purchased new in 1984. It is in a two-piece plastic box (top and bottom). Bill, N3RR List Sponsor: ChampionRadio.com - Trylon self-supporting towers, safety equipm
Joe, Here is what I think you need: Define: The desired actual heading of the antenna = X Define: The heading to be output from the software to the rotor meter movement = Y If 180 < = X < = 360, then
Correction: Depending on your software, you may need to equate 360 = 0 when Y = 360 Bill, N3RR rotor he into ideas?? List Sponsor: ChampionRadio.com - Trylon self-supporting towers, safety equipment,