Book Review

Radio Record, Volume IV, Issue 47, 5 June 1931, Page 10

Book Review

Practical Radio Repair Hints.

(By

Rider

"PHIS is a. book that can thoroughly be recommended to radio servicemen, as it deals comprehensively with all the difficulties that are likely to. be encountered in the course of radio servicing. Starting with a chapter on circuit continuity, the book takes its readers through such topics as distribution of current in A.C. receivers, automatic volume control, the use of 4 set analyser, condensers (including grid condensers, by-pass, audio plate filter and circuit blocking condensers: in fact every type of condenser imaginable, including the electrolytic condenser). Radio frequency and audio frequency chokes are fully discussed as are A.W. and output transformers. valves, volume controls, resistances. electrical interference, storage batteries, automobile radio, speakers. gramophone pickups and a host of other topies. Simple tests and hints of value, not only to the serviceman, but to the general listener are also. ineluded, For instance, here is a paragraph in this last-mentioned section headed, "Screen-Grid Tube Control Grid Clips." "A very satisfactory grid clip suitable for use with a screen-grid tube may be fashioned from a Hk’arnstock clip. Bend the clip back until it fits over the control grid terminal." Certainly a useful hint, but just who would have thought of it? The Farnstock clip, by the way, is the brass spring that is found on some types of "B" batteries. This chapter on simple tests and hints is one that is well worth studying. A reference section contains data and useful radio tables and charts. Included in this chapter are some very useful. tables giving the resistances of well-known and widely used makes of ammeters and milliameters. This is indeed handy where accurate work is to be done. There are many coil-wind-ing charts and tables. The book is published by the Radio Treatise Company, New York. Our copy came through the Te Aro Book Depot, Wellington.