History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1941 09

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P.01 - Front Cover

The Australasian Radio World

SEPTEMBER 15, 1941; Vol. 6 - No. 4; Price, 1/-

Registered at the G.P.O., Sydney, for transmission by post as a periodical

Cover Photo: Testing Valves at Philips' Australian Factory

Highlighted Contents: Serviceman's Signal Tracer: An Analysis of Push-Pull: Guide to the Short-Waves: Modern T.R.F. Circuit Design

P.03 - Contents Banner

The Australasian Radio World

Incorporating the

All-Wave All-World DX News

Vol. 6 - SEPTEMBER, 1941 - No. 4

P.03 - Contents

CONTENTS:

CONSTRUCTIONAL —

Signal Tracer for Servicemen . . . . 5

Simplest Five-Valver . . . . 11

"Vibra Four" as "Trade Builder" . . . . 29

TECHNICAL —

Balance Conditions in Push-pull Output . . . . 30

Technical Queries . . . . 38

SHORT-WAVE SECTION —

Questions They Ask the B.B.C. . . . . 17

Short-wave Review . . . . 22

Logging of the Month . . . . 24

P.03 - Editorial Notes

Editorial

Every now and then there is a tendency to get an impression that radio development has reached its climax, that every avenue of application has now been explored. Just in case you feel that way we would like to tell you about a book recently received from overseas. It deals with some new ideas about the use of ultra high-frequency radiations. It mentions such things as special valves with positive potentials on the grids and negative potentials on the plates, just to get the electrons mixed up so that the valves will oscillate without regeneration. Like a fairy story read the chapters about radio transmission from lenses made of ebonite, instead of aerials. Further details cannot be revealed at the moment, but you can take it for granted that when peace returns the wartime research will be found to have paved the way for radio development on a scale never before imagined.

P.03 - Publication Notes

The "Australasian Radio World" is published monthly by A. G. Hull. Editorial offices, 117 Reservoir St., Sydney, N.S.W. Telephone MA2455.

Subscription rates: 1/- per copy, 10/6 per year (12 issues) post free to Australia and New Zealand.

Printed by the Bridge Printery, 117 Reservoir St., Sydney, N.S.W., for the proprietor of the "Australasian Radio World," 117 Reservoir St., Sydney (Footnote P.40)