History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1949 05

3 P.01 - Front Cover The Australasian Radio World Registered at the G.P.O., Sydney, for transmission by post as a periodical. 1/6 Vol. 13 - No. 12; MAY 25, 1949 P.01 - Rola Ad P.02 - Crown Radio Products Ad P.03 - Contents Banner THE AUSTRALASIAN RADIO WORLD Devoted entirely to Technical Radio and incorporating ALL-WAVE ALL-WORLD DX NEWS VOL. 13 - MAY, 1949 - No. 12 P.03 - Publication Notes Published by the Proprietor — A. G. HULL, Balcombe St., Mornington, Vic. Phone: M'ton 344. Short-wave Editor — L. J. KEAST, 7 Fitzgerald Rd., Ermington, N.S.W. Phone: WL1101 Advertising Representatives — In N.S.W.: Amalgamated Publications Pty. Ltd., 83 Pitt St., Sydney. Phone: B1077 Representatives — In Queensland: John Bristoe, Box 82, Maryborough, Q. In New Zealand: H. Barnes & Co., 4 Boulcott Terrace, Wellington & S.O.S. Radio Ltd., 283 Queen St., Auckland In England: Anglo Overseas Press Ltd., 168 Regent St., London, W1. Distributed throughout the World by Gordon & Gotch (A/asia) Ltd. Subscription Rates: 12 issues - 16/-; 24 issues - 30/-; To N.Z. and Overseas - 12 issues, 18/-; Post free Address for all correspondence - Australasian Radio World, Box 13, Mornington, Vic. Printed by "Post" Newspapers Pty. Ltd., for the Proprietor of the Australasian Radio World, Balcombe St., Mornington, Victoria (Footnote P.44) P.03 - Contents CONTENTS Heterodyne Frequency Meter . . . . 5 Third Dimensional Amplifier . . . . 9 Multi-Vibrator . . . . 11 The Car-Lectric — Mk. III . . . . 13 How to Read Circuits . . . . 19 Magnets and Magnetism . . . . 23 Factory-Made Set Design . . . . 29 Voltage Regulation . . . . 31 Sell Speakers . . . . 37 New Brand of Coil Units . . . . 38 Short Wave Review . . . . 39 Speedy Query Service . . . . 50 P.03 - Editorial EDITORIAL THE selling of radio sets is not too easy these days. I have been making contact with a couple of radio salesmen lately, and have found their remarks most interesting. They tell me that the ballyhoo about television and F.M. has had a disastrous effect. They tell me, even with easy terms, the present list prices of the better-known receivers are so high that they frighten the prospective customer, who probably remembers that he paid less than £20 for the console receiver which has given him ten or fifteen years of faultless service. All of which are points of little interest to the technical man. There are technical problems, too. Quite a few prospective buyers are not satisfied with the quality of reproduction of modern sets. Having become accustomed to the distortion-free "tone" of an old t.r.f. set with a triode output valve, the modern superhet grates on their ears, even with the tone control at maximum setting. With a view to investigating this point further I interviewed an old lady with a 1926 model Radiola (American). After hearing this old-timer, I could readily understand why its owner would not consider buying a modern set. I am not in favor of so-called "high-fidelity" for the average set-buyer. I know that sets wouldn't be popular if they tried to reproduce the full audio frequency spectrum. But I do think there is plenty of scope for improvement in the elimination of distortion and the effective reproduction of the lower notes. Another point which emerged from a few talks with recent buyers of modern sets was that it is not desirable to place too much sensitivity in the hands of inexperienced listeners. They do not appreciate it, and complain that the set is noisy. — A. G. HULL. P.05 - Heterodyne Frequency Meter P.09 - Third Dimensional Amplifier P.11 - Multi-Vibrator P.13 - The Car-Lectric — Mk. III P.19 - How to Read Circuits P.23 - Magnets and Magnetism P.29 - Factory-Made Set Design P.31 - Voltage Regulation P.37 - Sell Speakers P.38 - New Brand of Coil Units P.39 - Short Wave Review P.50 - Speedy Query Service