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#4
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In some cases the fixing nuts and bolts have come loose. My next door neighbour's TV antenna was hanging off the chimney for years with perfectly satisfactory reception. I've never had an outside TV antenna. A length of wire hanging out of the socket on the back of the receiver always worked for me until the cotton curtains were replaced by aluminium venetian blinds. A polarisation error of 45 degrees of a dipole results in only 3 dB smaller signal. This is not noticed in areas of good signal strength where most people live. Polarisation doesn't seem to bother mobile phone users very much either. It is necessary only that interfering signals and echos, if there are any, are minimised. And that depends more on the direction from which waves are received. ---- Reg. |