September 1991
FEATURES
4 The Highs & Lows Of AID & DIA Conversion by Darren Yates
Discover the basics of AID & D/ A conversion techniques
12 Plotting The Course Of Thunderstorms by Leo Simpson
How lightning strikes are tracked
LOOKING FOR a great pair of
speakers to complement your hifi
system? If you can follow a
simple wiring diagram, you can
build this exciting 3-way system
for just $499. Details page 16.
88 The Story Of Electrical Energy, Pt.13 by Bryan Maher
The Tumut 3 & Murray 1 power stations
PROJECTS TO BUILD
16 Studio 3-55L 3-Way Loudspeaker System by Greg Swain
Build them from a kit for excellent sound quality
28 Digital Altimeter For Gliders & Ultralights by John Clarke
Portable unit has LCD readout & works to 19,990 feet
58 Build A Fax/Modem For Your Computer by Leo Simpson
Assemble it yourself for just $299.
70 Ultrasonic Switch For Mains Appliances by Jeff Monegal
If you stop moving, it switches the appliance off
THIS COMPACT digital
altimeter can display altitude up
to 19,990 feet, has a barometric
pressure offset adjustment & is
ideal for use in ultralights,
gliders, hang-gliders & balloons seepage 28.
SPECIAL COLUMNS
40 Serviceman's Log by the TV Serviceman
I'd never seen that one before
66 Computer Bits by Jennifer Bonnitcha
Swapfiles, program groups & icons
78 Amateur Radio by Garry Cratt
How glass-mount antennas work
82 Vintage Radio by John Hill
Transistor radios are worth collecting
HERE'S YOUR CHANCE to get a
fax & modem all in one go. This
combination fax/modem is
available as a kit for just $299.
Turn to page 58.
DEPARTMENTS
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3
36
53
55
2
Publisher's Letter
Circuit Notebook
Subscription Page
Product Showcase
SILICON CHIP
86 Back Issues
93 Ask Silicon Chip
95 Market Centre
96 Advertising Index
Note: space restrictions this
month have prevented us from
publishing the Remote Control
column & part 3 of the CD Error
Analyser. These articles will be
published in the October issue.