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FEBRUARY 1 988
FEATURES
6 Electronics and the Big Cat by Leo Simpson
SONY'S NEW CONTROL
amplifier and power amplifier
give exotic performance but
don't have an exotic price. We
take a look at this potent
combination starting page 30.
Multiple microprocessors work their magic
14 Easy Tips on Headphone Repair by Leo Simpson
Jacks and plugs give the most trouble
30 Sony Enters the Big Power Stakes by Leo Simpson
Superb new preamp/amp combination
50 South Pacific: The Electronic Version by J.L. Elkhorne
A tropical servicing adventure
80 The Evolution of Electric Railways by Bryan Maher
Pt.4 - Australia's first 100 years
85 Digital Fundamentals, Pt.4 by Louis Frenzel
Understanding & using flipflops
PROJECTS TO BUILD
18 Protector Car Burglar Alarm by John Clarke
Refined circuit has every wanted feature
36 Studio 200 Stereo Power Amplifier by Leo Simpson
High power and easy to build
46 End-of-File Indicator for Modems by Greg Swain
It buzzes when a file is finished
53 Build the Door Minder by John Clarke
Uses an ingenious pressure sensor
56 Low Ohms Adaptor for Multimeters by John Clarke
Accurately measures down to 0.01 ohms
THIS RUGGED STEREO
power amplifier puts out a
genuine 100 watts per channel
into 8-ohm loads and 160
watts into 4-ohm loads. Full
circuit and construction details
begin on page 36.
SPECIAL COLUMNS
60 Serviceman's Log by the original TV serviceman
His Master's Voice
70 The Way I See It by Neville Williams
Worth preserving: a colourful slice of electronic history
74 Amateur Radio by Garry Cratt
Line isolation unit for phone patch operation
DEPARTMENTS
2 Publisher's Letter
4 News & Views
17 Bookshelf
34 Circuit Notebook
92 Product Showcase
94 Ask Silicon Chip
96 Market Centre
SILICON CHIP'S NEW car
burglar alarm has internal and
external siren alarms, backup
battery, ignition killer and
dashboard flasher. Turn to
page 18.