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MonstIR PST 71 IC 7700 IARU 08 4 ele SteppIR PST 61
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Archive for October, 2009

80m 4-square Element Build

The elements are made in three sections.  The bottom is a 3m  2.5 x .25 inch aluminium tube, the middle is a standard 6m scaffold pole and the top is a 12m  spiderbeam pole.
The first job is to make the overlap joint for the aluminium  sections. I’ve allowed for a minimum of  a 12 inch overlap. Two M10 [...]

80m 4-square Luffing System

As the element is designed to swivel on the bottom bracket and lay flat on the ground for easy installation and maintenance a one man raising and lowering system is required. I purchased 4 inexpensive trailer winches off an Ebay shop. I had first thought about running the rope over a pulley wheel on the [...]

80m 4-square Pressure Treated Posts and Mounting Hardware

Four pressure impregnated  posts were sourced from a local farm outlet store. They are 5×5 (1250mm) inch x 2m long. I made 4 holes with a petrol driven hole borer to a depth of 750mm and spaced them 66 ft apart in a true square measuring across each of the diagonals. I then put [...]

80m 4-square Radial Connection

Connecting radials to a vertical can be a pain. There are some good commercially available systems but it can work out to be quite expensive when you have to have four of every thing. Here I have made a simple radial connection system out of copper electrical earthing bar. Its fairly labour intensive [...]