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Which plugs Wire my house X-Ray Remote 304114 wall plate FAQs BLOG Contact Us		DIY Phone Line Protector Here is a simple DIY project that could save you money. Equipment can be damaged when lightning is about. There's nothing you can do about a direct strike on your house but you CAN minimise damage by protecting your phone lines from surges that come up the telephone wires from a distant lightning strike. Here are brief details of our DIY surge arrestor. This is an illustration showing our earlier kit which comprised a twin gas discharge tube with three avalanche diodes. The kit now includes just ONE gas discharge tube and a 70 mm length of heat shrink insulating tube. The new discharge tube has the diodes built inside, making connection much simpler. You need a soldering iron to solder the wires but it's not difficult. See our soldering instructions. The completed surge arrestor is preferably connected to the incoming telephone wire pair at the master socket, as shown below. The surge arrestor MUST be grounded in order to be effective. In the example we have connected the green-yellow wire to the earth connection of a mains power socket but this is NOT ideal. If possible, a proper ground should be made by burying a metre long rod in the ground (see below) and connecting the earth wire to that. However the earth wire must be as short as possible so sometimes a nearby power socket is the only solution. A suitable grounding rod is available on page 5. You can connect it to a cold water pipe, provided that you are certain that pipe itself is grounded and not connected via plastic pipe. You may fit a surge arrestor inside equipment to be protected if space permits. Note: by doing so, you may void the manufacturer's warranty.   Cost We've tried to minimise the cost of this kit by supplying only the components that you'll find difficult or expensive to obtain elsewhere in single units. You can buy the green-yellow earth wire from most hardware electrical sections and the wires going to the 'phone line are nothing special. If you need a soldering iron and solder, we supply those. Send this page address - CLICK HERE - to a friend ! Safety considerations You must NEVER connect a ground wire to a gas pipe! You must switch the 230v mains power off at the master switch before touching any electrical sockets. A telephone socket is regarded as potentially dangerous because it could be carrying as much as 180 volts if a call is coming in so extreme caution must be taken when connecting wires. DO NOT carry out any electrical work while there is a storm in the area. If an electrical surge does affect your phone line, the surge arrestor components should be replaced. (They usually go short-circuit to protect your equipment and the phone line may no longer work until they are disconnected). Electrical parts may disintegrate explosively if subjected to a high energy surge. The surge arrestor should be positioned where such an effect will not cause secondary damage or injury to any person. Surge arrestors should not be mounted in close proximity to any high voltage wiring. All exposed parts should be insulated after installation. Note: as this is a DIY kit it is obviously not "approved for connection". Guarantee We warrant that the parts are free from defect when supplied. Fitting them as described should not affect the normal operation of your phone line or any connected equipment, even if you have ADSL. However, we can offer NO guarantees that the surge arrestor will give protection under any given circumstances. It WILL absorb a large part of the energy if a high voltage surge comes up the phone line but the outcome depends on the total energy, the voltage rise time, the effectiveness of your earth connection and many other factors. All we can say is that any damage that occurs with the surge protector fitted would probably have been worse without it. Go to catalogue Telephone Accessories page Send this page address - CLICK HERE - to a friend ! ©2004 SatCure A Beginner's Guide to Receiver Repair Based on the original "Screwdriver Expert's Guide to Satellite Receivers" this eBook describes the basic components and a typical power supply with diagrams and explanations. Shows how to solder and describes what to check and measure. Includes a basic guide to tracing the cause of a fault. It won't make you an expert but, if you are capable of soldering in components supplied as a kit, it will take you one step further so you understand why you are doing it and even help you figure out other possible fault causes and cures. If you buy a repair kit, you need this eBook. Click here FREE - Beginners Guide to Electronics Easier to understand than anything you've read previously! Martin has a knack of explaining technical subjects in simple language. Components covered include resistors, diodes, transistors and capacitors. As an example, it describes in detail how to build a flashing LED circuit on perforated strip board ("Veroboard") with a photograph of every stage. This is NOT just another boring technical eBook full of mathematical equations. You'll like it! Ideal for everyone from the young student to the retired lady looking for a new hobby. You'll definitely want more! Click here