This is only a preview of the November 1996 issue of Silicon Chip. You can view 23 of the 96 pages in the full issue, including the advertisments. For full access, purchase the issue for $10.00 or subscribe for access to the latest issues. Items relevant to "Build An 8-Channel Stereo Mixer; Pt.1":
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Publisher & Editor-in-Chief
Leo Simpson, B.Bus., FAICD
Editor
Greg Swain, B.Sc.(Hons.)
Technical Staff
John Clarke, B.E.(Elec.)
Robert Flynn
Rick Walters
Reader Services
Ann Jenkinson
Advertising Manager
Christopher Wilson
Phone (02) 9979 5644
Mobile 0419 23 9375
Regular Contributors
Brendan Akhurst
Garry Cratt, VK2YBX
Julian Edgar, Dip.T.(Sec.), B.Ed
John Hill
Mike Sheriff, B.Sc, VK2YFK
Philip Watson, MIREE, VK2ZPW
Bob Young
SILICON CHIP is published 12 times
a year by Silicon Chip Publications
Pty Ltd. A.C.N. 003 205 490. All
material copyright ©. No part of
this publication may be reproduced
without the written consent of the
publisher.
Printing: Macquarie Print, Dubbo,
NSW.
Distribution: Network Distribution
Company.
Subscription rates: $54 per year
in Australia. For overseas rates, see
the subscription page in this issue.
Editorial & advertising offices:
Unit 34, 1-3 Jubilee Avenue, Warrie
wood, NSW 2102. Postal address:
PO Box 139, Collaroy Beach, NSW
2097. Phone (02) 9979 5644. Fax
(02) 9979 6503.
PUBLISHER'S LETTER
On the track of
lightning
Every year at about this time thunderstorms and lightning become an important
part of the weather. This applies no matter
where you live in Australia although in some
parts the storms are often a great deal more
severe. In the tropical north, thunderstorms
during the “Wet” are an almost daily occurrence while in the more temperate southern
regions, thunderstorms invariably sweep in
from a particular direction and can cause a great deal of damage.
Many people, those who would rather watch television than go outside to
see what the weather is like, are blissfully unaware of the forces unleashed
in a large thunderstorm. Others, much fewer in number, are greatly in awe
of the almost mind-numbing energy being released and the ways in which
it happens.
Think about it for a while. A big band of thunderstorm cells can originate
as far north as the Kimberleys and then will move southwest in a period of
24 hours or so. It will move into northern NSW, pass over Dubbo or thereabouts and continue on to lash Sydney or the Gosford region. A day or so
later, its remnants can be seen in the evening, far out in the Tasman, still
active with lightning, thunder and lots of rain.
To try and comprehend how much energy has been released during such
a period of thunderstorms is impossible. Not only may millions of tonnes
of rainfall have been dumped over several states with widespread flooding,
but fierce winds may have caused further damage, unroofing buildings and
downing trees. Lastly, there is perhaps the most fearsome aspect, the lightning. This may have run at several thousand strikes an hour over a front
which may be a hundred kilometres wide or more. The total energy release
may easily be equivalent to several 100 megaton bombs.
These thoughts have been triggered by our feature article this month on
the subject of tracking thunderstorms, beginning on page 4. Even while this
article was being written, we experienced several severe thunderstorms, a
timely reminder that summer is with us again.
So read the article and enjoy it. And next time a thunderstorm passes
over your area think of the forces involved. Think about protecting all your
electrical and electronic gear too - the only sure way to so is to disconnect it
while ever the storm is in progress. And if the time between lightning strike
and thunderclap is three seconds or less, the lightning is directly overhead!
Lastly, if a thunderstorm is in progress, stay off the telephone – the next
victim could be you!
Leo Simpson
ISSN 1030-2662
WARNING!
SILICON CHIP magazine regularly describes projects which employ a mains power supply or produce high voltage. All such projects should
be considered dangerous or even lethal if not used safely. Readers are warned that high voltage wiring should be carried out according to the
instructions in the articles. When working on these projects use extreme care to ensure that you do not accidentally come into contact with
mains AC voltages or high voltage DC. If you are not confident about working with projects employing mains voltages or other high voltages,
you are advised not to attempt work on them. Silicon Chip Publications Pty Ltd disclaims any liability for damages should anyone be killed
or injured while working on a project or circuit described in any issue of SILICON CHIP magazine. Devices or circuits described in SILICON
CHIP may be covered by patents. SILICON CHIP disclaims any liability for the infringement of such patents by the manufacturing or selling of
any such equipment. SILICON CHIP also disclaims any liability for projects which are used in such a way as to infringe relevant government
regulations and by-laws.
Advertisers are warned that they are responsible for the content of all advertisements and that they must conform to the Trade Practices Act
1974 or as subsequently amended and to any governmental regulations which are applicable.
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