|[AMRadio] Tower Construction|
Stevan A. White
w5saw at pathwayz.com
Mon Jun 12 00:32:55 EDT 2006
DO RUN THE GROUND THROUGH THE CONCRETE! Take a look at the information on
this site first though. You may be glad you did.
Steve White, W5SAW
SW Commercial Electronics
From: Ed Swynar [mailto:gswynar at durham.net]
Sent: Saturday, June 10, 2006 2:16 PM
To: Discussion of AM Radio; boatanchors at mailman.qth.net
Subject: Re: [AMRadio] Tower Construction
I have a 48' tall, tapered, self-supporting "Delhi"-brand tower --- 6
sections at 8' long each.
The prescribed / manufacturer's recommendation is to bolt a 3' straight
formed extention at the base of each leg (total of 3), & to "suspend" these
(a temporary wooden "cradle" will do admirably, as the cement sets) in a
hole dug 4' square, & 4-1/2' deep --- the cement is to come but a few inches
below the bottom legs of the actual tower section.
Oh yes --- the bottom 1' of the square hole is to be "belled" outward a
foot, or so.
The documentation says this is good for heights of up to 64', or so...I've
never gone beyond 48', & have never, EVER had an ounce of trouble in the two
locations that I've had my tower up.
BTW, the top of the tower as an old Cornell-Dubelier AR-44 rotator, & a
3-element Hy-Gain TH3 MkIII triband yagi...
Use "industrial"-grade coarse cement, & do NOT run any ground leads through
the block itself!
~73~ Eddy VE3CUI - VE3XZ
----- Original Message -----
From: "david knepper" <collinsradio at adelphia.net>
To: <AMradio at mailman.qth.net>; <boatanchors at mailman.qth.net>
Sent: Saturday, June 10, 2006 12:44 PM
Subject: [AMRadio] Tower Construction
> I am thinking about buying a stick of Rohn 55G in cement with about 3
> or 4 feet sticking out of the ground. I wonder how many sections of
> 55G I
> mount without guys. I do have a strong base plate for the 55G but
> a section seems to be sturdier. Any thoughts?
> Dave, W3ST
> Publisher of the Collins Journal
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