"All About All-Electric"

Radio Record, Volume III, Issue 16, 1 November 1929, Page 5

"All About All-Electric"

On Sale Next Week YWVE are pleased to be able to announce that our handbook, "All About the All-Hlectric," will be available late this week, when readers will ‘be able to obtain a copy from booksellers and radio dealers. We have found it necessary to enlarge the size by another eight pages, making a total of 72 pages. There will, of course, be no alteration in the popular price of is. 6d. , All those who are at all interested in the all-electric set and its accessories, will find this book intensely ‘interesting, It has been written for the amateur, and everything possible has been fully explained. The reader is told what constitutes an all-electric set, why A.C. cannot be used on a D.C. set, how to choose an A.C. set, what are the qualifications of the uccessories that should go with it, and how to make sets. On the’ constructional side, the book is equally strong. We present for the first time a very full description of the A.C. 4-valve Browning-Drake. This set has been constructed, and on test, brought in all the Australian stations as well as some Japanese, proving its equality if not its superiority to the original 4-valve D.C. set. This article is well illustrated with diagrams and photographs, so _ that the amateur should have no difficulty

in constructing it. Inter-stage shielding has been done away with, and an aluminium sub-panel is used instead. This simplifies the construction work, and assures good results, For the man with a small purse, a crystal. set and.A.O. amplifier has been prepared. The construction of everything from transformer to the set itself has been made so simple that any inexperienced amateur may construct it. For those a little more experienced, and who have made their own D.C. sets, and now wish to change them to ‘A.C., we have given very full details of how this may be done. We would not, however, advise anyone totally inexperienced to attempt to change over a D.C. factory-built receiver. For the reader df this class, we have outlined two other methods of changing over a set: the use of adapter harness and the provision of "A.B.C." eliminators, There’ are several very: fine articles for the non-constructing reader. These include a very full description of power valves. As every reader knows, good quality can be produced only by the use of this type of valv- in the last stage, but many do not know just what. valve to use, or when to use it. For them, this article has been prepared. Another long article tells of the evolution of the A.C. valve, and its use in modern receivers. This article alone, is worth the very small sum charged for the book. For the D.X. listener we have prepared the most complete list of broadeast stations that, to our knowledge, has ever been published in New Zealand, There are 250 American stations alone. Those that have been received have been suitably marked, so that the

listener can see at a glance whether he has received a station that has not yet been reported. A very complete list of Australian and other overseas stations will also be found useful. Both lists are complete with wavelength and frequency in kilocycles. We have not yet seen a more comprehensive list of broadcast stations i any other radio magazine with stations so designated. This will be of the greatest assistance to listeners who are using sets that are calibrated in either of these divisions.