Guy anchor points, three, every 120 degrees, at a distance from the tower of
80% of the height, is standard. You can
guy less (or more), but in the case of less, if you are near the maximum
windload capability of the antenna, considering
your wind conditions, you may have to go to heavier guy wire, tensioned higher.
You will need an engineer to
calculate this, if you need closer guying. But, the standard, for a 100-foot
tower (to use an easy number for this example), would be to have the three guy
anchors equally spaced, 120 degrees apart, at 80 feet from the tower base.
I remember an article by K4VX about using regular guy cable, not broken with
insulators. He found it worked fine,
as long as your antennas are at the top. This has been my experience too.
Often the insulators are used when other antennas are side mounted down the
side of the tower, in addition to being at the top, or there are wire antennas
hanging between towers, etc. But if the antennas are just at the top, you
should be fine without breaking up the guys. This approach is much simpler and
less expensive.
73 - Rich, KE3Q
----- Original Message -----
From: Anibal Dos Ramos
To: towertalk@contesting.com
Sent: Tuesday, March 09, 2004 1:35 PM
Subject: [TowerTalk] Guys + isolators ???
Hi All
I am planing to install a 15m tower supported with guys (5 x 3m). I am
pretty sure it is not a big deal but the place where it will be located is
veeery windy, in the other hand i dont have to much experience with this.
Based on this I have two questions:
*Guys dimensioning considering wind load, space, etc, etc
*Isolators??: I know there some ham that use to add isolators in a
"non-resonants" pieces of guys. Is it really affecting the radiatting
pattern / VSWR???
I would like to know if someone could help me providing me some interested
links, experiences, etc.
Thanks in advance!!!
Anibal
yy5arr
_________________________________________________________________
MSN Amor: busca tu ½ naranja http://latam.msn.com/amor/
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
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