Useful Hints

Radio Record, Volume V, Issue 25, 31 December 1931, Page 8

Useful Hints

F you use the cat’s whisker type of crystal set, avoid scratching the crystal heavily. A light pressure is usually far more likely to give good results. F your signals tend to fall off in wet weather it will probably -be found that the aerial insulators are inadequate in number or that rain is spoiling them and making a conductive path across from aerial to "earth." "THE loudspeaker is one of the most inefficient accessories associated with radio, and even good ones can hand out only about 10 per cent. of the energy that is delivered to them by the radio set!