[Towertalk] Advice on Re-doing My Antennas

[Carl - WC4H]

I'm not an expert but I wouldn't recommend guying a self supporting tower
unless you speak with the manufacturer.

I used to have a Rohn HBX-40 installed.  I spoke with Rohn, and the gentlman
there said to NOT guy it.  Guying it would actually weaken the tower by
pulling out and down on it!!!  I was surprised but did not guy it since it
did make since.  The tower is not designed to have forces pulling out and
the extra downward pressure was like adding weight.

Moral:  On some self supporting towers, guying is worse than not guying.

73
Carl

----- Original Message -----
From: <K7LXC@aol.com>
To: <wd3q@erols.com>; <towertalk@contesting.com>
Sent: Tuesday, April 16, 2002 10:31 AM
Subject: Re: [Towertalk] Advice on Re-doing My Antennas


> In a message dated 4/16/02 6:29:46 AM Pacific Daylight Time,
wd3q@erols.com
> writes:
>
> > -what's the recommended material for guying?
>
>     I suspect that this is a self-supporting tower so properly installed
it
> should require no additional guying. I won't discourage you from
> over-engineering it by using guys though. Obviously some kind of steel
guys
> would work. Also Phillystran. What does the manufacturer recommend? (Well,
> TET isn't distributed in the States anymore but you can make some
inferences
> from the GME or Create versions.)
>
> >  -how high do I put the rotatable dipole over the tribander?
>
>     As far as practical? F12 recommends 12 feet spacing for their 40M
> antennas but it could probably be closer with the dipole parallel to the
> boom.
>
> >  -does the rotatable dipole go perpendicular or parallel to
> >    the tribander elements?
>
>     I'd try them both and see what happens.
>
> >  -does the rotatable dipole need a balun?
>
>     Yessireebob. You've got a balanced load fed by an unbalanced feedline.
>
> Cheers,
> Steve       K7LXC
> TOWER TECH
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