I've looked through the Rohn catalog but can't find the effective wind area data for Rohn tower sections. I'd like data for 25G, 45G, 55G and 65G, although my immediate need is for 65G and 25G, in th
I'm not looking for the antenna wind area that the tower can support. I'm looking for the maximum wind area of the 25G thorugh 65G tower sections themselves. _________________________________________
Thanks to all who took the time to answer my question. I had done rough calculations and was using 0.25 sq.ft./lin.ft for 25G and 0.45 for 65G. I figured there must be Rohn numbers to double check m
Wouldn't this violate the LXC Prime Directive for Rohn 25G through 65G towers? As far as I can tell, the latest Rohn catalog specifies pier pin bases only for guyed towers. I suppose you might find
As far as I can tell, all of the bases that show the legs placed on gravel are for free-standing and bracketed towers. The guyed towers all specify bases CB1 to CB3 which are all pier-pin bases. Ove
Does anyone know of a software program for doing tower design? It would particularly nice if it already had models of Rohn 25 through 65 tower sections. I found an online calculator for Trylon towers
I've been wondering about the property line setback requirements for towers recently. Why do most areas have set back requirements for towers based on height but nothing similar for buildings? Is th
I think if you look at the drawing and notes more carefully you'll see that not only is the vertical rebar necessary, but so is the horizontal. The drawing I have (C610621) calls for 4 No. 6 vertica
I'm planning on an Ufer ground in my new tower base. I've seen several sites recommending 20' or more of #2 or larger copper wire wrapped around the outside of the rebar cage. Are there any chemical
Sinking the ground rod several inches below the bottom of the foundation hole and only running copper wire out the bottom of the concrete is no problem. If house foundations use copper wire for Ufer
So are you saying that you don't believe in Ufer grounds? If I understand them correctly, the whole point is to develop a low impedance path to ground through the concrete. _________________________
I'm certainly no expert either. That's why I'm asking the questions. My research pointed to Ufer grounds for towers as a good solution. Ufer proponets claim that exploding concrete is a myth. I got
We're talking the bottom of the foundation which is typically 4 to 8' below the surface. In most parts of the country the ground temperature that deep doesn't vary much over the period of a year. So
I just acquired an Orion 2300 rotator. I compared it to a friend's Orion 2800 and I can't see any visible differences. Can anyone tell me what is the difference between the two rotators? 73, Clay W7C
Rohn doesn't recommend using the bottom tapered section for a top. Take a look at Drawing C630665, in the 2004 Revised Rohn Catalog. There are two notes on the drawing as follows: "All sections can
The MonstIR is 3 full-sized elements on 40M on a 34' boom. 34' is WAY too long for a two element 40M beam. M2 uses a 19'7" boom for their 2 element beam and 29'7" for their three element beam. Force
The MonstIR has 3 active elements on 40/30M, and 4 elements on 20 through 6M (optionally 6 elements on 6 with two extra fixed length elements). The fourth element (director 1) is only 36' long, so it
Measure the face width of the bottom section of the tower. The TX-472 is 21-5/8" and the HDX-572 is 25-5/8". 73, Clay W7CE _______________________________________________ ___________________________
Amazing what you can do with 3.6 MILLION watts.....wow. According to the HAARP website, the 180 crossed dipoles are spread out over 22.6 acres. Their online gain calculator indicates that the gain is
Is 20 lb/sq ft correct for 90 mi/hr winds? I've run several of the published formulas in the past and seen other references that would indicated that 36 lb/sq ft is a good number to use at 90 mph. I