> With all the discussion about Rohn 25 and windloading etc. You have
>almost convinced me that trying to fold over my Rohn 25 tower not only
>isn't going to work but that the tower is only good for uhf vhf
>antennas!!!
> Well I guess the TH6 is going to stay in the barn for another 3 or 4
>years and I get to keep using my Butternut vertical for my only antenna.
>It is ashame too as I have 5 empty acres and all I can do is a lousy
>vertical makes me lose all incentive to upgrade
> Not flaming anyone just upset that I can't do anything better that
>what I have. It wouldn't be so bad if I lived on a small city lot
>73
>Rick
>kc5ajx (tech plus forever)
Hi Rick,
I have had 102 feet of Rohn 25 successfully installed since 1973 with the
following antennas on it: At 112 feet: 5 element 10 with 20 foot boom. At
102 feet: 6 element 15 with 32 foot boom. These two antennas are rotated
together with a Tailtwister. At 70 feet: 4 element 10 with a 12 foot boom
fixed on the SE. At 55 feet: 4 element 10 on a 12 foot boom. At 50 feet:
4 element 15 with a 20 foot boom. These two antennas rotate together on a
homebrew sidemount for about 300 degrees. This tower also supports one end
of an 80 meter wire sloper and one end of a 160 meter wire sloper both tied
to the top of the tower. It also has a two meter ground plane at about 60
feet and a commercial pager antenna at 90 feet (a 2 inch diameter vertical
about 8 feet high and offset from the tower about 18 inches).
The tower is set solidly in concrete and guy wires (four sets guyed three
directions) do all the work. I used very good earth anchors purchased from
a utilty supply company set 6 feet below the surface and I use 3/16
galvanized wire rope (4200 pounds breaking strength), 1/4" forged
turnbuckles, 500D strain insulators every 20 feet in each guy, and mostly
crimp on copper sleeves as cable clamps except in a few places where I use
conventional wire rope clips. The thing looks as solid as the day I put it
up. I would hesitate to put any more stuff on it but I have no problem
climbing to the top to work on the antennas.
For those who will tell me it is overloaded, it probably is, but I put it up
long before I was smart enough to know that and its peformance history tells
me it probably will not fall down at this stage in its life. I feel safe
with it.
Stan w7ni@teleport.com
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