[TowerTalk] Cubex Mantis II

[Jim Thomson]

Date: Sat, 11 Mar 2017 17:28:12 +0000
From: M?ximo EA1DDO_HK1H <ea1ddo at hotmail.com>
To: Jim Thomson <jim.thom at telus.net>, "towertalk at contesting.com"
<towertalk at contesting.com>, "n9wx at hotmail.com" <n9wx at hotmail.com>
Subject: Re: [TowerTalk] Cubex Mantis II

Hi,


If it is a self-supported tower, best option is to install a "lift". A top part of a guyed tower, the one where the rotator is, and install four wheels. And a couple of U shape rails along the tower.

This roller stuff has a steel wire down to the bottom with a small winch.

This system allows you to lift and lower the antenna with ease. For maintenance or when bad weather.


In this picture you can see a 2 elements quad for 7 MHz, installed in a self supported tower with lift system.



http://www.ea1ddo.es/galeria/albums/EA5CTE/normal_EA5CTE_28429.JPG

[http://www.ea1ddo.es/galeria/albums/EA5CTE/normal_EA5CTE_28429.JPG]


73, Maximo

##  Thats a lot of work to add dual  U rails , wheels, and a moving top tower section etc.   You would also have to have the quad pointed in the right direction, so its boom  doesnt land on top
of the existing tower..which implies the rotor must be working.   The typ free standing tower is also tapered, wider at the bottom, and narrow at the top.  So a huge offset would be required
to keep the moving tower section straight.   Actually not true.  Just rotate the boom a bit to compensate.  A motorized crank up tower may well be the ticket.  They are typ 24-26 ft tall, when nested. 
But a crank up is also very expensive. 

Jim  VE7RF