History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1947 09

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. 12 - No. 4; SEPTEMBER 15, 1947 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 - SEPTEMBER, 1947. - No. 4 P.03 - Publication Notes Editor, Publisher, Proprietor — A. G. HULL, Balcombe St., Mornington, Vic. Short-wave Editor — L. J. KEAST, 6 Fitzgerald Road, Ermington, N.S.W. 'Phone: WL1101 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, Balcombe St., Mornington, Victoria Printed by Bridge Printery Pty. Ltd., 117 Reservoir Street, Sydney, N.S.W., for the proprietor of the "Australasian Radio World," Balcombe St., Mornington, Vic. (Footnote P.52) P.03 - Contents CONTENTS CONSTRUCTIONAL — Signal Tracer for Service . . . . 7 Build Your Own Oscillator . . . . 9 TECHNICAL — Anisotropic Alnico . . . . 17 Beams, Beams, Beautiful Beams . . . . 21 The Kingsley "K.S.9'er" . . . . 23 A Review of Ferrotune . . . . 25 Ideal Broadcast Station Console . . . . 32 Among Our Readers . . . . 34 Calling CQ . . . . 41 SHORTWAVE REVIEW — Notes From My Diary . . . . 46 THE SERVICE PAGES — Answers . . . . 50 P.03 - Editorial EDITORIAL For some weeks past the Atlantic City Allocations Committee has been fixing the future bands for amateur operation. This is a vital matter for "hams" and so a number of keen listeners have been tuning in to W1AW, the official station of the American Radio Relay League, in order to get the official announcements as they have been decided. On August 9th an announcement was made that the ten-metre band had been settled on a world-wide basis as from 28 to 29.7 Mc. On August 12th came over news that South Africa Australia and New Zealand were now pushing with the Americans for the use of the 11-metre band, shared with diathermy and electrical appliances. By August 19th the fate of the higher frequencies had been sealed, but on a complicated formula which will be explained in detail later. Apparently it is on the lines of existing allocations from 31.7 to 10,500 mC., but there will be no 220 mC. band for Australia and New Zealand. For Europe and Africa the 144 mC. band has been cut down to only 2 mC. wide. On August 25th the details were released of the popular DX band, 20 metres. The amateur frequencies were fixed at 14,000 to 14,350, in dictating that after a seven-weeks' battle the amateurs lost 50 kC. to fixed services. With the present crowding on this band the loss is a sad one, but quite a few have given a sigh of relief to know that the cut is only 50 kC. At the moment the lower frequency allocations have not yet been settled, but judging by results so far the prospects are quite bright. A. G. HULL. P.07 - Constructional - Signal Tracer for Service P.09 - Constructional - Build Your Own Oscillator P.17 - Technical - Anisotropic Alnico P.21 - Technical - Beams, Beams, Beautiful Beams P.23 - Technical - The Kingsley "K.S.9'er" P.25 - Technical - A Review of Ferrotune P.32 - Technical - Ideal Broadcast Station Console P.34 - Technical - Among Our Readers P.41 - Technical - Calling CQ P.46 - Shortwave Review - Notes From My Diary P.50 - The Service Pages - Answers