MAKING AN EARTH

Shannon News, 6 January 1928, Page 4

MAKING AN EARTH

REST METHODS DISCUSSED. Te make a really good earth represents one of the regular problems cl radio. Buried conductors running underneath the whole length of the aerial probably represent the best possible arrangement, but owing to the work and - general dislocation that the installation of an arrangement tends to cause, it is seldom carried out The next best earth is probably an old dustbin, rvaler-tank, or other galvanised article of considerable area buried at least three feet deep (and this depth should he measured, or. if estimated by the digger, the estimate should be divided in two) at a point. which will give a good short connection to the set. A joint to such an earth should be made by soldering on the wire in several places and painting the joints over to retard electrjolvsis.

The chief point to remember about earths, however, is that tilt® 'do not usually mix well. For instance, it is just about as bad to use a buried earth and a water pipe connected together to form one earth for the set ■is to try to use two aerials simuitan eously. Each earth requires separate tuning, and for general purposes it is much Jut ter to use one earth only.