History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1946 11

3 P.01 - Front Cover The Australasian Radio World Registered at the G.P.O., Sydney, for transmission by post as a periodical. 1/- Vol. 11 - No. 6; November 15, 1946 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. 12 (sic, 11) - NOVEMBER, 1946 - No. 6. P.03 - Publication Notes Editor, Publisher, Proprietor — A. G. HULL, 336 Waverley Rd., East Malvern, Vic. Short-wave Editor — L. J. KEAST, 3 Fitzgerald Road, Ermington, N.S.W. Ham Notes By — D. B. KNOCK (VK2NO), 43 Yanko Av., Waverley, N.S.W. Advertising Representative for Vic. — W. J. LEWIS, 20 Queen St., Melbourne, 'Phone MU5154 Advertising Representative for N.S.W. — Amalgamated Publications Pty. Ltd., 83 Pitt St., Sydney, Phone: B1077 Subscription Rates: 6 issues - 5/3; 12 issues - 10/6; 24 issues - £1; Post free to any address in the world. Address for all correspondence: Australasian Radio World, 336 Waverley Rd., East Malvern, SE5 Victoria Printed by Bridge Printery Pty. Ltd., 117 Reservoir Street, Sydney, N.S.W., for the proprietor of the "Australasian Radio World," 336 Waverley Road, East Malvern, Vic. (Footnote P.44) P.03 - Contents CONSTRUCTIONAL — "Ferrotune" Mantel Model . . . . 15 TECHNICAL — A Really Good Amplifier . . . . 5 More Restrictions for Amateurs . . . . 7 A New Home for "Radio World" . . . . 9 Circuit for A.C. or Battery . . . . 11 Technical Radio in S. America . . . . 13 A Full Frequency Range Amplifier . . . . 18 To Deliver Forty Five Watts . . . . 19 Some Notes on the Care of Batteries . . . . 28 Calling CQ . . . . 31 SHORTWAVE REVIEW — Notes for My Diary . . . . 38 Shortwave Schedules . . . . 40 THE SERVICE PAGES — Answers . . . . 42 P.03 - Editorial EDITORIAL A number of readers are annoyed at the slow progress being made towards the introduction of communications-type receivers on the Australian market. Just before the war we had occasion to mention this subject several times, without much success. Then came the war and several local factories made communications receivers to the order of the Ministry of Munitions. The local receivers were excellent in every way, quite up to world standard. Now many short-wave enthusiasts can't understand why these receivers cannot be bought for love or money. Enquiry reveals that in most cases the communications-type receivers that were manufactured in local factories were complete projects of the Ministry of Munitions. The Ministry stood the initial cost of the development and tooling up for these receivers and it is not possible for the factories concerned to use this equipment for ordinary commercial set production. Eventually the special tools, dies and jigs may be declared as surplus to the requirements of the Ministry, then handed over to the Disposals Commission for sale, and finally come to be put to good use in the production of communications-type sets for ready sale to our many eager enthusiasts. In the meantime, one possibility is the indenting of English receivers of this type, which appear to have been considerably improved as a result of war-time research. They are available in England at comparatively easy prices and can be imported without much trouble. - A. G. HULL. P.05 - Technical - A Really Good Amplifier P.07 - Technical - More Restrictions for Amateurs P.09 - Technical - A New Home for "Radio World" P.11 - Technical - Circuit for A.C. or Battery P.13 - Technical - Technical Radio in S. America P.15 - Constructional - "Ferrotune" Mantel Model P.18 - Technical - A Full Frequency Range Amplifier P.19 - Technical - To Deliver Forty Five Watts P.28 - Technical - Some Notes on the Care of Batteries P.31 - Technical - Calling CQ P.38 - Shortwave Review - Notes for My Diary P.40 - Shortwave Review - Shortwave Schedules P.42 - The Service Pages - Answers