[TowerTalk] Rohn 45

[Roger (K8RI) on TT]

On 12/26/2013 7:42 AM, Gregg Seidl wrote:

I thought you originally said 40' of 45G.
I've used "Quadrature" arrays here on 144, but not on six.  That's a 7L 
C3i that was at 115 feet.
20 feet is rared  @ 22 sq ft, 30 feet is 12 sq ft at 70 MPH fastest 
wind, no ice.  With that 27 to 28 feet (top section is 7 feet) 18 sq ft 
is still a bit over the ratings.

73

Roger (K8RI)
> Looks like I’ve got suggestions from weld the 45 to the 25 and this just isn’t going to work. For those who do not understand what a 24 foot box is,it is 4 antennas mounted on each corner of a 24 feet by 24 feet box. It is for EME. The way you end up with 28 feet of Rohn 45 is 2 ten foot sections and one flat-plate top section,I think those are 8 feet but they may be 7 feet. II ‘d have to go in the shed and measure it. I could guy it but it would not be guyed at the typical 70-80% of the towers’ height. The guys would get in the way of the bottom antennas.I could possibly guy the tower about 10 feet up and 10 feet out which isn’t spec but it would help a LOT. The 18 square feet I stated is close with all the H frame pipe there. The antennas are only 10 square feet but the pipes add about 8 more square feet plus the rotor face adds a little more too. I have a M2 2800 rotor to use for this project.
> I must say that my first thought was to remove the base and place the 45 in the hole and re-cement and that is what I still think I might do.
> Hopefully this will clear up what my intentions are with the 45.
>
> Gregg K9KL
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