[AMRadio] Tower Construction

Ed Swynar gswynar at durham.net
Sat Jun 10 15:16:13 EDT 2006

Hi Dave,

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?
> Thanks
> Dave, W3ST
> Publisher of the Collins Journal
> Secretary to the Collins Radio Association
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