History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1945 07

3 P.03 - Contents Banner THE AUSTRALASIAN RADIO WORLD Devoted entirely to Technical Radio and incorporating ALL-WAVE ALL-WORLD DX NEWS VOL. 10 - JULY, 1945 - No. 2 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.36) P.03 - Contents CONTENTS CONSTRUCTIONAL — Wide Range Resistance and Capacity Meter . . . . 9 Tone Compensation Amplifier . . . . 20 TECHNICAL — Radio in America . . . . 5 Theory of Oscillation . . . . 17 Power Supply Filters . . . . 24 Straede's Amplifier Contest . . . . 24 A Short Course in Radio Fundamentals . . . . 26 Latest Technical Notes from New York . . . . 29 SHORTWAVE REVIEW — Notes From My Diary . . . . 30 New Stations . . . . 31 Loggings . . . . 32 THE SERVICE PAGES — The Service Pages . . . . 34 P.03 - Editorial EDITORIAL. The Wireless Institute of Australia has issued a "white paper" in the form of a list of draft proposals for post-war experimental radio. The suggestion is made that there should be three types of amateur licences. The new licensee is to pass the usual type of examination and is then allowed to operate a power of 50 watts on morse code for the first six months. If all goes well he is then allowed to operate telephony, still on 50 watts for another six months. Having operated for twelve months without falling foul of any trouble, the ham is then allowed to step up to a "B" licence, which allows him to use 100 watts of power. After operating under "B" class conditions for six months; and passing a test in Higher Radio Technology and Electrical Theory and morse code at 16 words per minute, the amateur operator will then qualify for a licence to operate an "A" class station at 250 watts of power. Many other matters are covered, such as minimum ages for class "C" at 16 years and class "B" at 18 years, but the above outline gives a fair idea of the plan. To us the scheme seems sound, except for that one sore point of ours, the morse code test. In both England and America there appears to be a trend to abandon the code test as having little use. War experience has shown that morse code communication is slow, unsatisfactory and generally considered quite out-of-date. To some people the code comes easily, to others it means hundreds and hundreds of hours wasted in "swotting," ending in sad disappointment to the nervous candidate when he makes a few errors at the examination. A. G. HULL. P.05 - Technical - Radio in America P.09 - Constructional - Wide Range Resistance and Capacity Meter P.17 - Technical - Theory of Oscillation P.20 - Constructional - Tone Compensation Amplifier P.24 - Technical - Power Supply Filters P.24 - Technical - Straede's Amplifier Contest P.26 - Technical - A Short Course in Radio Fundamentals P.29 - Technical - Latest Technical Notes from New York P.30 - Shortwave Review - Notes From My Diary P.31 - Shortwave Review - New Stations P.32 - Shortwave Review - Loggings P.34 - The Service Pages