History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1943 10

P.03 - Contents Banner

The Australasian Radio World

Devoted entirely to Technical Radio

and incorporating

All-Wave All-World DX News

Vol. 8. - OCTOBER, 1943 - No. 5.

P.03 - Publication Notes

Proprietor - A. G. HULL

Technical Editor - J. W. Straede, B.Sc.

Short-wave Editor - L. J. Keast

Manager - Dudley L. Walter

Secretary - Miss E. M. Vincent

City Office - 243 Elizabeth St., Sydney - For all correspondence: Phone MA2325

Office Hours - Week-days: 10 a.m. - 5 p.m., Saturdays: 10 a.m. - 12 noon

Editorial Office - 117 Reservoir Street, Sydney

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," 117 Reservoir St., Sydney (Footnote P.28)

P.03 - Contents

CONTENTS:

CONSTRUCTIONAL -

Design for a Simple A.C. Bridge . . . . 5

A Receiver Circuit for Utopia . . . . 9

Building a High-Grade Audio Transformer . . . . 15

TECHNICAL -

History of the Cathode Ray Oscilloscope . . . . 7

Revivals in Radio Practice . . . . 13

Servicing Suggestions for A.C.-D.C. Sets . . . . 18

SHORTWAVE SECTION -

Shortwave Review . . . . 20

Notes and Observations . . . . 21

Allied and Neutral Countries Shortwave Schedules . . . . 23

New Stations . . . . 25

THE SERVICE PAGES -

Answers . . . . 26

P.03 - Editorial Notes

Editorial

Once again the question of Marconi's early work on the development of radio communication has been brought into the limelight. The Supreme Court of the United States has ruled that Marconi did not invent radio and has invalidated the American patents of his, dated 1904. The court's opinion was based largely on the fact John Stone showed a four-circuit that a patent granted in 1902 to wireless telegraph apparatus substantially like that later specified and patented by Marconi. Irrespective of court decisions, however, there is no doubt that Marconi was the practical man who knew how to make the most from the new science. Which brings us to the point we wish to stress; there is a wonderful field of opportunity waiting for the firm or individual who can organise a really effective way of entering the field of electronics. Being so closely allied to radio, it is only natural that we turn to the radio engineers as the most likely men for the job. It has been demonstrated beyond a shadow of doubt that there are remarkable prospects for the commercial application of the photo-electric cell, thyratron, ignitron, kenatron, magnetron and the hundred and one other recently introduced applications of the electron stream. These units can be of great service to industry, yet they lie comparatively dormant, waiting for the right kind of publicity campaign to bring their merit under the notice of those who should be interested in their possibilities as aids to production. There is no need to wait until after the war is over, as they might well be obtained on the lend-lease plan to help in our war effort.