[South Florida DX Association] Tower assembly JA style

[NPAlex at aol.com]

I responded with the following to a series of exchanges on the popular  Tower 
Reflector which many of you belong to so you may have seen this  before.  But 
I thought maybe other SFDXA members might find JM7OLW's web  site and tower 
project of interest.
 
Norm W4QN
==============================================
Lately there has been  discussion of tower  bases and installations on the 
Tower Reflector as in  Greg's message below, and I am also in the process of 
relocating a tower with  the 
attendant problems of digging the hole, stabilizing the hole (sandy  soil), 
rebar framing and finally pouring the concrete.   

I  thought that was a lot of work and expense until I ran across the 
following  
series of pictures of a Japenese ham's tower installation.  Suke JM7OLW  must 
have one of the most expensive tower support systems ever  constructed.  Take 
a 
look at his site -  http://www.geocities.jp/jm7olw_suke/KT35SR.html  Albeit 
it 
is a big  tower, that is a lot of concrete work.  He also has an outstanding  
signal on 40m CW most mornings.

Regards,
Norm  W4QN
===============================================

Message:  8
Date: Sat, 7 Oct 2006 17:19:48 -0700
From: "AB7R"  <ab7r at cablespeed.com>
Subject: [TowerTalk] Tower base advise
To:  <towertalk at contesting.com>
Message-ID:  <NPEPLDGLIFKDGPHGAGOMMEHJEOAA.ab7r at cablespeed.com>
Content-Type:  text/plain;    charset="iso-8859-1"


Not sure if I over  did this or not.  My neighbor brought his backhoe over
this afternoon to  dig the foundation for my HG-70HD tower and raising
fixture.

The specs  only call for a 4x4x8 hole.  While we did not quite hit 8ft (a bit
over  7 in the middle), the dimensions came to 6.5 x 6.5.  Thats 270 cubic  ft
vice 128.  Is the slightly shallower depth going to make a big  difference?
I attached a couple pics.

I hope to schedule the concrete  pour for this week.  4000 psi and gonna have
it poured pretty wet.   Do I need to get one of those vibrating things or is
pouring it wet  sufficient?