History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1940 06

P.01 - Contents Banner

The Australasian Radio World

Incorporating the

All-Wave All-World DX News

Vol. 5. - JUNE, 1940 - No. 1.

P.01 - Contents

CONTENTS:

CONSTRUCTIONAL -

"Fidelity Six" . . . . 3

"Mystery Dual-Waver" . . . . 17

"Vibra Fidelity Amplifier" . . . . 21

"War News Booster Unit" . . . . 35

GENERAL TECHNICAL -

"Old Reliable" . . . . 9

Set Building as a Hobby . . . . 11

AMPLIFIER SECTION -

Fidelity Amplifier for Country Home . . . . 21

Amplifier Championship . . . . 23

Elimination of Distortion . . . . 27

SHORT-WAVE SECTION -

From Ill-fated Oslo . . . . 14

Hour by Hour Tuning Guide for War News . . . . 24

Review . . . . 29

The Month's Loggings . . . . 30

Short-Wave Tuning Guide . . . . 32

JUNIOR TECHNICAL -

Hints and Tips . . . . 42

Earthing the Receiver . . . . 44

Soldering Practice . . . . 45

TRADE NOTES -

Free Price List . . . . 42

New Radiokes Company . . . . 43

SPEEDY QUERY SERVICE -

Answers to Readers' Problems . . . . 47

P.01 - Publication Notes

The "Australasian Radio World" is published monthly by A. G. Hull. Editorial offices, 117 Reservoir Street, Sydney, N.S.W. Telephone FL2842. Cable address: "Repress," Sydney. Advertisers please note that copy should reach office of publication by 14th of month preceding that specified for insertion.

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

Printed by Bridge Printery Pty. Ltd., 117 Reservoir Street, Sydney, N.S.W., for the proprietors of the "Australasian Radio World," 117 Reservoir St., Sydney (Footnote P.48)

P.02 - Editorial Notes

Editorial Notes . . .

Should an Editor tell? Should an Editor admit the mistakes which always seem to happen in circuit diagrams and wiring layouts, no matter how doubly they are checked and re-checked? When the mistake is noticed should the Editor lie low, say nothing and hope that the majority of his readers have not noticed the mistake, and retain their impression that the diagrams are always one hundred per cent, perfect? Or should the error be noted in the following issue so that those who are in trouble will see the correction and solve their problem without further worry? Judging by technical journals from all over the world there seems to be a definite hesitancy about the admission of errors, but we feel that our readers are of a standard much higher than the average intelligence, and we don't think that they are going to consider our technical articles completely unreliable just because an occasional slip happens. Just how these slips do occur is fairly easy to explain, when the normal procedure is considered. First the design of the set is considered, and a rough circuit drawn up. From this rough circuit two copies are made, one for the man building up the chassis and the other for the artist who is draughting the final circuit schematic. When the set is being built and tested there are often minor changes made necessary to allow parts on hand to be used, or to cure unforeseen troubles which arise when the chassis is being given a thorough test on the air. When the chassis has been finally passed as O.K. it goes to the artist who draughts the picture diagrams from it. Later the diagrams are checked and re-checked, but every now and then there is an error or a substitution drawn into the diagrams which is not discovered. In most cases it is merely a matter of two alternative values being given, both equally suitable in practice and either value can be used without affecting results in any way. But they are different, and to the average set-builder such substitutions are confusing and worrying. We fully appreciate how well off we would be without them. But if they do happen then we feel that it is up to us to admit them in the next issue, even if the majority of other technical journals are not so candid with their readers. A. G. HULL