Tag Archives: Wind Turbine

GB3WE 5 GHz Dish & 2.4 GHz Tonna

GB3WE Antennas June 2014

GB3WE Antennas June 2014
5 GHz omni
5 GHz dish
2.4 GHz omni
2.4 GHz Tonna
GB3WB 8 Stack
GB3WE Folded dipole

GB3WB Tower Destroyed In High Winds

On Sunday Morning 29th April 2012 our main tower suffered massive damage in the high winds.
At 5.22 am the lower part of the latice tower folded which caused the whole tower to fall into a nearby tree.
Amazingly not a single antenna or feeder was damaged and even the wind turbine and blades are in perfect working order.

In order to keep all of our repeaters on the air we have moved GB3WE’s folded dipole onto our small wind turbine mast. This mast holds the GB3WB 4-Stack already, so its coverage is unaffected.

To keep GB7WB on air we have had to temporarily fit a colinear to the very short remains of the damaged tower, so it is practically at ground level. Obviously coverage will be well reduced, but at least GB7WB is still on the air.

It was a very big and dangerous job to get the whole tower and turbine out of the tree. But to make the area as safe as possible as quickly as possible we have worked on the site more or less night and day for three days in some terrible weather conditions.

Here are a selection of photos of the damaged tower.

GB3WE Tower Guy Wire Isolation System

The GB3WE VHF repeater suffers tremendously from ‘metal-on-metal’ interference as all repeaters do. This interference is noticeable on any weak signals accessing the repeater and sounds like a constant crackle and almost as if a microphone has been placed next to two pieces of metal while they are being rubbed together!
This is caused by the repeaters transmitter constantly transmitting its energy into all nearby metal objects and the receiver being able to detect the making and breaking of any conductors which are allowed to freely move across each other.
Every conductive object must be either securely fixed to any adjacent conductive object or insulated completely from the other objects, the important thing is that they must never rub together.
Our guy wires were our biggest problem, so we had to devise a way to insulate them from the tower and each other to remove the interference that we were suffering from.
It didn’t help that we have a three section wind-up tower with a very heavy wind turbine mounted on the top, which caused the tower and guy wires to move continuously in the wind!
Cutting the Gordian knot!   …..  The photos show how we overcame the problem.

Here is a short video to show you how bad the interference is when a weak signal is accessing GB3WE and metal objects are allowed to rub on the guy wires

GB3WE February 2012 Tower Configuration

January 12th 2012 New GB7WB Blades and Tail Fitted and Sprayed

GB3WB Mast Lowered To Repair Wind Turbine