# History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1943 02
## P.03 - Contents Banner

The Australasian Radio World
Devoted entirely to Technical Radio
and incorporating
All-Wave All-World DX News
Vol. 7. - FEBRUARY, 1943 - No. 9.

## P.03 - Publication Notes

Proprietor, Publisher, Editor - A. G. HULL
Technical Editor - J. W. Straede, B.Sc.
Editorial Offices -
117 Reservoir Street, Sydney, Phone M4078 - M4079 and
187-193 Berkley St. Carlton, Victoria - Phone F4136
Office Hours - Week-days: 9 a.m. - 5 p.m. Not open Saturday morning
Subscription Rates - 6 issues 5/3, 12 issues 10/6, 24 issues £1, Post free to any address
Service Departments - Back Numbers, 6d. ea., post free; Reply-by-mail Queries, 1/- each; Laboratory Service, 2/6 per set
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 -
A De Luxe Signal Tracer . . . . 5
Power for the Battery Amplifier . . . . 9
S.W. Converter for Battery Sets . . . . 15
TECHNICAL -
Ideas in Circuits . . . . 11
Evolution of the Tuning Condenser . . . . 13
Substitute Valves - Part 2 . . . . 16
Radio Step · by Step - Part 11 . . . . 17
Resistor and Condenser Boxes . . . . 18
Selections of Crystals for Crystal Sets . . . . 19
SHORT-WAVE SECTION -
Co-Prosperity in Formosa and Korea . . . . 20
Short-Wave Review . . . . 21
New Stations . . . . 23
Loggings of the Month . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

## P.03 - Editorial Notes

Editorial
The news sessions being broadcast from Japan leave no doubt about the efficiency of the spy service being operated right here in Australia. It is fairly evident that the Japanese have an organisation which sends them full information on matters which should be kept secret. From the working of the Japanese spy system in Australia it appears almost certain that radio transmitters are being operated from Australia. One official view is that the transmitters must be installed in trucks, which move from place to place, making it a difficult job to track them down. No matter just how or where this Japanese transmitter is operated it appears to us to offer an exceptional opportunity for our readers to do something really startling; to unearth this transmitter. Most of our readers have sets which are capable of covering every wavelength from 5 to 550 metres, and somewhere in this band there must be some unusual type of noise or radiation, if not a straight out morse or phone signal. Perhaps the greatest difficulty is to appreciate that this spy transmitter is almost certain to be operated by an Australian or British person. This seems hard to believe, but it is equally unlikely that any Japs are walking about freely in Australia, so that we will have to look to the unexpected in this spy hunt. The suggestion that our readers should keep a sharp look-out for any suspicious transmission is quite unofficial, but we haven't any doubt that if any reader has anything to report he will have no difficulty in getting action from any police or military officer.