You have leverages to consider that will complicate matters. If your winch
is mounted 30 feet higher than the swivel point and the 150 pound
antenna/rotor is 120 feet from the swivel point the winch will see 600
pounds of antenna. Add 285 pounds for the yagi at 90 feet and 110 pounds
for the yagi at 60 feet and you have 995 pounds of dead weight before you
start to consider the tower.
I'm not an engineer but just for yucks say the top half of the tower (less
antennas/rotators/guys) weighs 1000 pounds. The leverage here is between
times 2 and 4, call it 3 for talking purposes. You will be pulling 3000
pounds of tower at the winch.
You will be pulling far in excess of 4000 pounds when the tower is
horizontal.
And then you will require swivel boom to mast clamps so the antennas will be
horizontal when the tower is down and swing to their horizontal position
when the tower is vertical.
Not to mention that the area where the tower/antenna/guys swivel down to
will have to be clear of obstructions and fairly level. And the set of guys
that are on the far side of the tower will tangle when the tower is lowered.
Other thoughts: the antennas will require maintenance, and not all antennas
will require that maintenance at the same time. And if/when the system is
no longer wanted what happens to the modified house?
I have removed many antenna/tower systems for estates (I keep what I take
down for my fee), but for what you are talking about - don't call me.
I suggest you do as a friend of mine did with his pair of 100 foot towers
and multiple antennas: hire Steve, our reflector host.
de Paul, W8AEF
----- Original Message -----
From: "Bob Gates" <regates@kingwoodcable.com>
To: "Tower Talk" <towertalk@contesting.com>
Sent: Tuesday, May 31, 2005 7:31 AM
Subject: [TowerTalk] "House" Method of Raising a Tilt-Over Tower
> Evening/morning all,
>
> My wife and I are celebrating tonight. We've just inked the contract to
> buy a house in the Portland, OR area. Goodbye city life, back to God's
> country, and adios to years of living under that dreaded term "covenants"!
> This will be my first tower since 1978. And I was QRT from 1979 to about
> two years ago. Have been existing with low power and a stealth vertical,
> camouflaged and butted up against a big pine tree. Well, the new place
> sits on top of a ridge with a 360 view (except for some trees blocking Mt.
> Hood. And I'll be thankful for them when it erupts. Much has obviously
> changed in 25 years, but I'm going back to the basics of installing a
> tower.
>
>>> SNIP - SNIP - SNIP
_______________________________________________
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
|