May 1991
TV DISTRIBUTION systems pose
special problems for the antenna
installer. Find out how to tackle
these problems by turning to
page 4.
FEATURES
4 How To Install Multiple TV Outlets by Jim Lawler
Pt.1: selecting the antenna
10 Motors For Electric Vehicles by Gerry Nolan
It's "watts" under the bonnet that counts
82 The Story Of Electrical Energy, Pt.10 by Bryan Maher
High-power DC transmission lines
PROJECTS TO BUILD
24 Stereo Audio Expander by Darren Yates
THIS SIMPLE AUDIO expander
will add sparkle to your music &
video cassettes by increasing the
dynamic range of the signal.
Construction starts on page 24.
Puts the sparkle back into your audio tapes
30 Build A DTMF Decoder by Darren Yates & Greig Sheridan
Control up to 9 appliances via the telephone line
42 Fluorescent Light Simulator For Model Railways by Darren Yates
Simulates the "flicker" when fluoros start up
58 13.SV 25A Power Supply For Transceivers by John Clarke
Features current limiting plus overvoltage crowbar
SPECIAL COLUMNS
18 Vintage Radio by John Hill
All about regenerative receivers
70 Serviceman's Log by the TV Serviceman
YOU CAN CONTROL up to 9
appliances via the telephone line
with this DTMF decoder. We
show you how to build it starting
page 30.
I was only a little bit careless
76 Computer Bits by Jennifer Bonnitcha
Colouring your PC world
79 Amateur Radio by Garry Cratt
AR2500 multi-mode scanner covers 500kHz-1500MHz
DEPARTMENTS
2 Publisher's Letter
17 Subscription Page
53 Product Showcase
67 Circuit Notebook
75 Bookshelf
90 Back Issues
92 Ask Silicon Chip
95 Market Centre
96 Advertising Index
LOOKING FOR a really big
power supply to run a highpower transceiver? This unit can
deliver 25A continuously at
13.5V. Details page 58.
MAY1991
1