History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1950 07

3 P.01 - Front Cover The Australasian Radio World Registered in Australia for transmission by post as a periodical. 1/6 Vol. 14 - No. 12; JULY 15, 1950 P.01 - Rola Ad P.02 - R.C.S. Radio Ad P.03 - Contents Banner THE AUSTRALASIAN RADIO WORLD Devoted entirely to Technical Radio and incorporating ALL-WAVE ALL-WORLD DX NEWS VOL. 14 - July, 1950 - No. 12 P.03 - Publication Notes Published by the Proprietor — A. G. HULL, Box 13, Mornington, Vic. Short-wave Editor — L. J. KEAST, 7 Fitzgerald Rd., Ermington, N.S.W. Phone: WL1101 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., Ulster Chambers, Regent St., London, W.1. 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 The Clyde Press, 608 High St., Thornbury, for the Proprietor of the Australasian Radio World, A. G. Hull, Box 13, Mornington, Victoria (Footnote P.35) P.03 - Contents CONTENTS Our HI-FI Party for Readers . . . . 5 A Novel Sound System . . . . 6 "The Farmer's Four" . . . . 9 "Hamlet Jnr." . . . . 15 A Switched Amplifier . . . . 17 V.F.O. with Power . . . . 19 Interesting T.R.F. Circuit . . . . 21 Ham Notes . . . . 22 Receiver Circuit Designs . . . . 23 For the Practical Man . . . . 30 Foreign Language Broadcasts . . . . 31 Speedy Query Service . . . . 34 P.03 - Editorial PERSONAL As announced on page 5 of this issue, I have made arrangements for a get-together of those interested in the subject of quality reproduction. When it comes to the subject of sound reproduction, the laboratory of the Rola Company is probably the best-equipped in the Commonwealth. I have often visited there to hear the latest in speakers, to play around with the latest of imported gramophone outfits. These visits have always been of great interest and I have often said to myself that I would like all my readers to be able to share such pleasures. Now, through the co-operation of the Rola Company, it has become possible for me to extend to you an invitation to be present at a really fine demonstration which has been arranged for 3rd August. At this party I hope that it will be possible to get down to tin tacks on the subject of what is worth hearing and what is not. Reproduction of the highest fidelity, equal to anything yet done in any part of the world, will be demonstrated, as well as filtered effects to show what is lost in realism when the frequency response is restricted. A. G. HULL. P.05 - Our HI-FI Party for Readers P.06 - A Novel Sound System P.09 - "The Farmer's Four" P.15 - "Hamlet Jnr." P.17 - A Switched Amplifier P.19 - V.F.O. with Power P.21 - Interesting T.R.F. Circuit P.22 - Ham Notes P.23 - Receiver Circuit Designs P.30 - For the Practical Man P.31 - Foreign Language Broadcasts P.34 - Speedy Query Service