History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1945 05

3 P.03 - Contents Banner THE AUSTRALASIAN RADIO WORLD Devoted entirely to Technical Radio and incorporating ALL-WAVE ALL-WORLD DX NEWS VOL. 9 - MAY, 1945 - No. 12 P.03 - Publication Notes PROPRIETOR — A. G. HULL Manager - DUDLEY L. WALTER Secretary - Miss E. M. VINCENT Short-wave Editor — L. J. KEAST For all Correspondence: City Office — 243 Elizabeth St., Sydney, Phone: MA2325 Office Hours — Weekdays: 10 a.m.-5 p.m. Saturdays: 10 a.m.-12 noon Editorial Office — 117 Reservoir Street, Sydney Victorian Advertising Representative — W. J. LEWIS, 20 Queen St., Melbourne, C1 'Phone MU5154 Subscription Rates: 6 issues - 5/3; 12 issues - 10/6; 24 issues - £1; Post free to any address. Service Departments — Back Numbers, 1 /- ea. post free; Reply-by-mail Queries, 1/- each Printed by Bridge Printery Pty. Ltd., 117 Reservoir Street, Sydney, N.S.W., for the proprietor of the "Australasian Radio World," Elizabeth St., Sydney (Footnote P.28) P.03 - Contents CONTENTS CONSTRUCTIONAL — An Improved Reflex Circuit . . . . 7 One-valve Test Oscillator . . . . 9 A Sound Design for an Audio Oscillator . . . . 13 TECHNICAL — Tolerance in Set Design . . . . 5 A High-Fidelity Hint . . . . 11 Building the A.I.F. Broadcaster . . . . 12 A Short Course in Radio Fundamentals — Part 4 . . . . 16 New Dutch Valves . . . . 22 SHORTWAVE REVIEW — Notes From My Diary . . . . 23 New Stations . . . . 24 Loggings and Changes . . . . 25 THE SERVICE PAGES — The Service Pages . . . . 26 P.03 - Editorial EDITORIAL. Now that censorship is being relaxed it is possible to tell some of the facts about the part which radio played in winning the war in Europe. It is now freely admitted that the British supremacy in radiolocation was of tremendous help. In the Battle of Britain we were using radiolocation so effectively that every time a German bomber arrived over England there was a team of Spitfires and Hurricanes waiting for it and a few thousand feet above it. The Germans gained the impression that England had unlimited numbers of fighter aircraft, whereas it was the work of the British radio engineers which told the R.A.F. just where and when to expect the German bombers. It has also been revealed that the Navy pays due tribute to radiolocation. It has been stated in English papers that the success of the Allied naval gunnery was due to the use of radar aiming and distance finding. The scientific application of radio knowledge is given full credit for victory in the Battle of Matapan. Directly and indirectly the radio enthusiast and the keen amateur transmitter have been responsible for the Allied supremacy in radar and communications. It is therefore only right and logical to expect the authorities to give every possible encouragement for the further development of radio as a scientific hobby. So far there is every indication that this is so, but it is the duty of everyone interested to get behind the Wireless Institute of Australia, as the recognised mouthpiece of amateur radio, and make sure that the subject is kept clearly before the minds of those officials who have been appointed to control the ether. — A. G. HULL. P.05 - Technical - Tolerance in Set Design P.07 - Constructional - An Improved Reflex Circuit P.09 - Constructional - One-valve Test Oscillator P.11 - Technical - A High-Fidelity Hint P.12 - Technical - Building the A.I.F. Broadcaster P.13 - Constructional - A Sound Design for an Audio Oscillator P.16 - Technical - A Short Course in Radio Fundamentals — Part 4 P.22 - Technical - New Dutch Valves P.23 - Shortwave Review - Notes From My Diary P.24 - Shortwave Review - New Stations P.25 - Shortwave Review - Loggings and Changes P.26 - The Service Pages