Radio Broadcast (May 1927-Apr 1928)

252 RADIO BROADCAST ADVERTISER You'll like this Distinctively Novel Treatment of Radio (OFF PRESS DECEMBER 1) A POPULAR GUIDE TO MODERN RADIO By B. FRANCIS DASHIELL of the U. S. Weather Bureau Right up to the minute — Clear explanations of the basic sciences involved in radio — Discussions of apparatus and equipment — special treatment of weather effects — ioi diagrams; 8 full-page plates — The finest sort of Christmas remembrance for radio fandom. Price $3.50 Clip this and mail with remittance to Williams & Wilkins Co. Publishers of Scientific Books Baltimore Maryland Seventh Edition Just Off the Press ROBISON'S MANUAL OF RADIO TELEGRAPHY AND TELEPHONY Completely Revised and Up-to-Date Of the 6th edition of this book reviewed by QST it was said this is perhaps "The Best Radio Book That Ever Came To This Desk" The standard Navy hook on radio originally prepared in 1907 by Lieutenant {last year Admiral and C-in-C of U. S. Fleet) S. S. Robison. The 6th edition and the present edition revised by Commander S. C. Hooper, U. S. Navy, late Radio Officer, U. S. Fleet. Price $5.50 postpaid (former edition sold for $8.00) Address: Secretary-Treasurer, U. S. Naval Institute Annapolis, Md., U. S. A. NEW PERPETUAL RADIO HANDBOOK Loose-Leaf Pocket Size $3.50 POST PAID COMPLETE WITH LEFAX 6-RING FLEXIBLE POCKET BINDER WRITE FOR FULL PARTICULARS ON LOOSE-LEAF RADIO DATA SERVICE LEFAX, INC., PHILADELPHIA, PA. THIS RADIO CHRISTMAS by Zeh Bouck LIKE all people. I hate to brag. And I sinj cerely believe that there is no one in this world who knows more about giving things radio for Christmas than the writer. I have had a radio laboratory for some ten years now, to which manufacturers send samples of their products. With the exception of an occasional birthday, or a debt here and there, this apparatus accumulates until around this time of the year. And I'd give away a lot more Christmas presents if radio manufacturers only supplied green tissue paper and red ribbons. So it is most fitting that I should be telling you how to spend your money on radio Christmas presents — or perhaps it isn't. I find myself in somewhat the reverse situation of Oscar Wilde's cynic who knew the price of everything but the value of nothing. At any rate, our ever-increasing horde of radio burglars will find what I have to say of unequalified use. From One Dollar Up WE — or rather you — may start your purchases from a dollar up. (Make sure you do not start them with a dollar down. This stretches Christmas out over too long a period of time with rather fatal results to the Christmas spirit.) In the case of a radio Christmas present, not everything within the various price ranges can be considered. There are many parts particularly designed for special circuits and receivers, and unless you are aware that the recipient is interested in this particular apparatus you will do well to confine yourself, for the greater part, to accessories. One Dollar to Three Dollars This class recommends itself to gifts among the family — to brother, sister, cousins, aunts, and all the rest sacred to Gilbert and Sullivan. The following are really too useful for gifts: One or two 01A type tubes A loud speaker extension cord A battery cable A light socket antenna (for the gentleman with the loop set) An antenna set A set of 0.5, 1.0, 1.5, 2.0, 3.0, and 5.0megohm metallic grid leaks At the very beginning we run into the inevitable book. The following are on our own shelves : For the Engineer: Engineering Mathematics, D. Van Nostrand and Company For the Amateur: The Radio Amateur's Handbook, The American Radio Relay League, Hartford, Connecticut, $1.00. For the Average Fan: The Outline of Radio, by John V. L. Hogan, Little Brown and Company, or How Radio Receivers Work, by W. Van B. Roberts, published by Radio Broadcast, Garden City, N. Y., $1.00 A subscription to The Bell Technical Journal (195 Broadway, New York City) at $3.00 will be gratefully received by the engineer in the family, and a subscription to QST (American Radio Relay League, Hartford, Conn.) at $2.00 by the amateur or even broadcast fan. Three Dollars to Five Dollars As we go up a bit in price, the charity that should begin at home evidences itself in gifts outside the family — our purse strings loosen and we splurge with: Output filters A set of five 1.0-mfd. bypass condensers A telephone headset A power tube A filament relay The following books for engineering folk: Theory of Vibrating Systems and Sounds by Crandall, $5.00. (D. Van Nostrand & Co.) The Thermionic Vacuum Tube by H. J. Van deBijl, (McGraw Hill), $5.00 A most acceptable and unique gift may be effected by obtaining a copy of Radio Instruments and Measurements from the Bureau of Printing and Engraving, Government Printing Office, Washington, for $.75 (no stamps) and having it bound by Brentano's or some similar establishment. And a subscription to Radio Broadcast is never out of place. Five Dollars to Ten Dollars A slide rule is always an acceptable present to the engineering friend who possesses the inevitable book, if he hasn't a slide rule. Get a Keuffel and Esser Polyphase Mannheim ten-inch rule. Do not succumb to the seductive technicalities of various "duplex" and "log log" designs. The engineer would thank you, of course, for these last types, and use it, perhaps, as a straight edge; but that's about all. You can always determine whether your technical friend has the book you want to give him or not. Just say to him, "I understand that in hyperbolic space the characteristic constant is negative, the degree of negativity varying directly with the divergence from Euclidean space. I want to check up on this. Lend me your Crandall, or your Morecroft or your Van de Bijl, will you? " If he tells you he hasn't the book, you will know he has it but doesn't want to loan it to you. The following are indispensable books: The Manual of Radio Telegraphy and Telephony, Admiral S. S. Robison, United States Naval Institute, Annapolis, Md. $5.50 Principles of Radio Communication, J. H. Morecroft, John Wiley and Sons, New York City, $7.50 (and worth it!) An electrical Engineering Handbook Among parts and accessories, we have: A QRS or Raytheon Rectifying tube An output filter A resistance-coupled amplifying kit A filament control relay (to control your power unit and A battery from the set's on-off switch) A tube rejuvenator A Balsa Speaker kit A loud speaker unit Ten Dollars to Fifteen Dollars The customary way to give Christmas gifts is to establish the understanding that you do not believe in the exchange of gifts — that you are giving nothing except cards — and then give presents anyway to make your friends uncomfortable. We suggest the following in the line of this expensive misanthropy: An "A" supply filter such as the "A-Box" A good trickle charger A kit. A Balsa speaker kit Fifteen Dollars to Twenty Dollars We are fairly well above the usual engineering books, but you might try a set of Rabelais. Boni and Liveright have a new limited edition selling for $20.00 Then there are: A complete set of "B" batteries (a really fine present!) A cone loud speaker A set of good audio transformers A kit A standard high-rate charger A Balsa speaker kit Twenty Dollars to Twenty-Five Dollars We may now leave on the price tags, and suggest —