November 1990
FEATURES
6 How To Connect Two TVs To One VCR by Jim Lawler
Avoiding ghosts & other hassles
16 Introduction To Digital Electronics by Joseph Carr
Learn about logic gates & flipflops
98 The Story Of Electrical Energy, Pt.5 by Bryan Maher
Gas turbine power stations in the Northern Territory
110 Turn Your CRO Into A Spectrum Analyser by Alex Eades
A $399 accessory probe does the job
THROW AWAY that primitive
rheostat model train controller.
This simple unit offers much
improved running characteristics
& has simulated inertia as well.
Details page 42.
PROJECTS TO BUILD
24 Battery Powered Laser Pointer by Leo Simpson
Explore the fascinating technology of laser light
42 Low-Cost Model Train Controller by Greg Swain
Build it for improved starting & low-speed running
56 A Really Snazzy Egg Timer by Darren Yates
It ticks away the seconds & sounds a chime
72 Build A 1.5V To 9V DC Converter by Darren Yates
Uses just three components & fits on a small PC board
75 Modifications To The 16-Channel Mixer
Revised circuit has even better performance
SPECIAL COLUMNS
38 Vintage Radio by John Hill
Testing old radio valves
48 Serviceman's Log by the TV Serviceman
The customer takes a holiday
66 Amateur Radio by Garry Cratt
The 6-metre summertime special
80 Computer Bits by Jennifer Bonnitcha
Computer cables & all that rot
104 Remote Control by Bob Young
Nicad cells for high rate discharge
EXPLORE THE fascinating world
of laser light with this battery
powered laser. Our article on
page 24 shows how to build it.
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THE SERVICEMAN took so Jong
to fix this month's fault that the
customer went on holiday. There
weren't really any Eskimos but
the Serviceman did try a spot of
freezer. See page 48.
DEPARTMENTS
3 Publisher's Letter
4 Mailbag
32 Circuit Notebook
90 Product Showcase
96 Back Issues
2
SILICON CHIP
113
115
116
119
120
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WANT TO HOOK two (or more)
TV sets up to one VCR? Our
article on page 6 shows you how
it's done.