In a message dated 10/14/2007 8:15:50 P.M. Pacific Daylight Time,
towertalk-request@contesting.com writes:
> I see where KA9FOX put up a self supporting 72' Trylon at his old qth and
at his new qth, he put up a 95' Rohn 55G. I know at his old qth, he didn't
have the space for the 55G. Other than the additional feet between the two,
what are the advantages of the guyed Rohn tower over the self-supporting?
Scott has a rotating tower. You can mount beams anywhere on the tower
and they'll all turn together. If it was a standard fixed 55G you could still
have side-mounted antennas using swinging gate side-mounts or TIC rotators.
The additional face width of the self-supporting tower makes this kind of
difficult.
Another difference is the load at height. If you wanted to go higher
with the self-supporter, the tower capacity goes down fairly quickly; not so
fast with the guyed tower since it uses the guy wires as part of the
supporting
structure. Guyed towers are typically cheaper because of that. The cost of a
tower is the cost of the steel in it. Self-supporting towers generally have
much more steel in them for the height than a guyed tower so they're more
expensive.
Cheers,
Steve K7LXC
TOWER TECH and
_www.championradio.com_ (http://www.championradio.com)
************************************** See what's new at http://www.aol.com
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|