[TowerTalk] Roof Towers

[Bill Heinzinger]

Kirk
I used a 10 foot tripod type tower on my roof with a Hy-Gain tribander for a
few years.

Anchoring the tower with 14" bolts drilled through the rafters and backed
with a cross bar which went across a few rafters inside the attic.
Held up real well.
Grounding is a problem, it's difficult.

A bigger problem could be the fact you are inside the pattern.
I had such terrible rf in my second floor, right under the antenna by 12
feet, shack that I had to move into the basement.

And you may want to run one of the safe level programs to tell you the rf
exposure for the people sleeping under that antenna.

Someone else may be able to give you the distance/power radiations levels
info.


----- Original Message -----
From: "KIRK LAWRENCE" <kirklaw@flint.umich.edu>
To: <towertalk@contesting.com>
Sent: Thursday, August 03, 2000 5:47 PM
Subject: [TowerTalk] Roof Towers


>
>
>                    Has anyone had experience in using a tri-bander on
> top of your roof with a
>                    roof tower mount? Have been looking to put up my TA-
> 34XL, but if I choose
>                    to mount it on a roof tower (such as a Glen Martin 10
> footer) will I have any
>                    distortions in the pattern or swr problems if it is
only
> 10 ft. from the roof
>                    line? I called Mosley and didn't really get a
convincing
> answer, but they
>                    stated that anything beyond 7ft from the antenna
> shouldn't affect it at all. If
>                    I choose a roof mount, the antenna would be approx
> 40 to 45ft high (from
>                    ground level). I would like some real "hands-on"
> answers from those who
>                    have been there.   I realize that the Tri-bander
setting
> in the garage works better in the air (hi hi), but should I consider
> waiting until I could afford a crank-up (which would be in about a
> year)?  What I want to try an avoid is the "geeze I should have just
> waited" senerio.  I do have a dipole and vertical that currently work
> well, just would like to get out a little better and I realize I could
> with the beam.  AND....what advice for roof mounted towers??
> Lightning protection, etc.  Any  help would be appreciated......73
> Kirk AB8B
>
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