JUNE 1988
FEATURES
LOOKING FOR A NEW stereo
control unit to .go with your
power amplifier? This unit has
excellent performance, plenty
of control features, and is easy
to build. See page 28.
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10 What is Negative Feedback? by Bryan Maher
Pt.2 - Why we need negative feedback
15 Realistic Optimus 3-Way Loudspeakers by Bob Flynn
Three-way system is good value for money
80 The Evolution of Electric Railways by Bryan Maher
Pt.8 - The first 3-phase AC electric railway
86 Digital Fundamentals, Pt.8 by Louis Frenzel
Introduction to microcomputers
PROJECTS TO BUILD
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SERVICEMAN'S LOG this
month tells the story of a ringin picture tube. There's also
the usual collection of zany
cartoons. Turn to page 38
28 Studio 200 Stereo Control Unit by Leo Simpson
New benchmark performer is easy to build
44 Convert Your Car to Breakerless Ignition
by John Clarke
Get rid of those old-fashioned points
56 Automatic Light Controller by Branco Justic
Uses an infrared sensor to detect movement
62 Mega-Fast Nicad Battery Charger by Greg Swain
Charges a 7.2V racing pack in just 20 minutes
SPECIAL COLUMNS
6 The Way I See
It by Neville Williams
For all practical purposes, Mr Fixit has had his day!
16 Vintage Radio by John Hill
Cleaning up a vintage radio receiver
38 Serviceman's Log by the original TV serviceman
Ring out the new, ring in the old
72 Amateur Radio by Garry Cratt
Build an RF sniffer probe & preamplifier
THIS MEGA-FAST NICAD
CHARGER will recharge a
7.2V nicad racing pack in just
20 minutes. It then switches
off to prevent overcharging.
Details page 64
DEPARTMENTS
2 Publisher's Letter
3 Mailbag
4 News & Views
19 Back Issues
51 Book Reviews
69 Circuit Notebook
75 Subscriptions
77 Product Showcase
94 Ask Silicon Chip
95 Notes & Errata
96 Market Centre
LAST MONTH, we showed
you how to install a highenergy ignition system in your
car. This month, we show you
how to replace the points with
a Hall Effect pickup for
maximum performance and
even less maintenance. See
page 44.
JUNE 1988
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