Hello all

An interesting topic.

A slightly  different slant on the thread.

A couple of weeks ago I was talking to a ham who has used towers for
years.  He also works for Hilti.
He reckons that the best way to put up a tower is on a block of concrete
in the ground (about 4 foot six cube for a 60 foot tower with moderate
HF beams on it), mark out where the holes are to be for the base plate,
drill 18 inches into the block about three quarter diameter and use the
epoxy assisted stainless bolts.

He was advising against bolting to the house owing to the noise of wind
on the tower and antennas resonating through the house

I currently use a home brew mast which swivels on the back of the house
and I lower it into the garden using a double block from a 40 to 1 boat
trailer winch - I can do this single handed although assistance makes
the job easier.
I then use a single pulley on the mast with a rope to the TH5 undo the
fix bolts, and lower it into the garden - again single handed.

Currently that is where the beam is waiting for a new balun from hy-
gain!!!!!!



73 de G3YXX

I think you wrote  below <[log in to unmask]>,
Phil Scovell <[log in to unmask]> writes
>I now have two rohn 25G towers.  One is 65 foot and guyed in two places and
>the other is 45 feet and I have a house bracket at about 10 feet above
>ground on that one.  I also have one set of guys near the top but they
>really aren't needed because I only have a small two meter antenna on top of
>that one.  The guys are actually bolted with large eye bolts to either end
>of my house and to a fence post in the back yard which is in concrete.  The
>base of the shorter tower is also in about a foot of concrete for a base.  I
>once had a 40 foot tower with a 4 element 20 meter beam on it with basically
>the same arrangement just described.  It went through a 110 mile an hour
>wind once and all that happened was the antenna twisted on the mast.  That
>40 foot tower, however, was bolted to the house at 14 feet above ground and
>the single set of guys were at about 35 feet.  The house bracket I used
>then, and I am using now on one tower, is not directly bolted to the side of
>the house.  along the roof line overhang, I have about four feet of two by
>four bolted down in four places with large wood bolts.  Then the bracket,
>when the tower was set and the concrete dried, was bolted into that two by
>four so it has added strength.  the only reason I put guys on my 45 foot
>tower with my two meter antenna is because I get nervous with all the sway
>but according to all I read about rohn towers before putting mine up, they
>claim, if you bolt it to the house, and have something like only two square
>feet of antenna, you need no guys for a 50 foot tower.  You never could pay
>me enough to climb 50 feet of rohn 25 with guys unless it was bolted to the
>house 50 feet off the ground, haw.  Man, I don't even like the sway on 65
>feet of tower when it is guyed at two points.
>
>Phil.
>k0nx

--
David W Wood