I go with those who say, American.
I had one on a dirt base for many year. "Usually" I had a tribander on
it, although I had a 3L Cushcraft tribander @ 90 feet, TV ant at roughly
100' and a big , heavy repeater ant above that. Wayyy too much for that
tower!
It was a royal PITA to climb which I did many times. As has already been
mentioned, the spacing between the horizontal cross braces was too wide
for comfortable climbing. 90 feet is too high to be safe with that
tower even with a big TV antenna. 40-50 feet is fine for a 3 or 4L
tribander. 1/4" wire rope let alone EHS is too heavy. 1/8th in steel
guys are about maximum for safety. I've taken down quite a few and none
were straight. 40-50 footer were quite popular in the 60s as tribanders
of that era were generally light weight and used ones were plentiful as
this area only had about 3 TV stations available. IIRC in the early
days only channel 6 out of Lansing was available with a snowy B&W
picture However going to 80 or 90 feet with 25G added quite a few.
There were a few taller towers with single channel (monobanders made
from real Al tubing) for Detroit and Grand Rapids. Many decades (about
5) later when TV went Digital, with two long UHF antennas ( at 90 and 95
ft) I could pull in 22.
I believe the ROHN 20 which was stronger, was listed as a tower for TV
antennas.
There are still a few American towers in this area, generally free for
taking them down.
73
Roger (K8RI)
On 10/13/2016 Thursday 8:57 AM, Alex Malyava wrote:
Hi all,
A friend of mine got 4 sections of this tower -
https://goo.gl/photos/YjvjBy5idJV93ByQA - and he has no idea what exactly
it is.
It is on concrete foundation and will be bracketed to the house @ 28' level.
I am just wondering: what this tower is good for? Is it like for a
tribander only and nothing else or he can put 40m Moxon or some shortened
2-3 element 40m beam on it?
I am afraid that 40m beam will twist the tower and rip it off the wall.
That's, by the way, separate story - how bad will be 2-3 element 40m beam
mounted @ 42' height?
Is it still better than vertical?
Thanks,
Alex K2BB
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