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Contents
Vol.11, No.9; September 1998
FEATURES
Blocked Air
Filter Alarm
For Cars –
Page 32 . . .
4 Troubleshooting Your PC; Pt.5
Software problems and DOS games – by Bob Dyball
14 Electromagnetic Compatibility Testing; Pt.2
Emissions and interference – by Marque Crozman
28 Time Alignment Testing of Loudspeakers
The importance of correct driver time alignment – by Terry Paget
92 Special Subscriptions Offer
Plus Gear
Change
Indicator –
Page 66
Buy a subscription to “Silicon Chip” before end of September 1998 and
get a bonus wallchart
Waa-Waa
Pedal For
Guitars –
Page 36
PROJECTS TO BUILD
32 A Blocked Air Filter Alarm
Simple device tells you when it’s time to change the air filter element
– by Adrian Cuesta
36 A Waa-Waa Pedal For Your Guitar
All the circuit details plus how to build a foot pedal – by John Clarke
58 Build A Plasma Display Or A Jacob’s Ladder
Two fun projects for the price of one – by Branco Justic
66 A Gear Change Indicator For Cars
It tells you when to change gear – by John Clarke
80 A Capacity Indicator For Rechargeable Batteries
A 3-digit display shows the remaining battery capacity in ampere-hours
– by Rick Walters
SPECIAL COLUMNS
20 Serviceman’s Log
The old radio from the Cadillac – by the TV Serviceman
76 Vintage Radio
A short history of spy radios in WW2; Pt.1 – by Rodney Champness
DEPARTMENTS
2 Publisher’s Letter
26 Circuit Notebook
44 Order Form
53 Product Showcase
Plasma Display/Jacob’s Ladder
– Page 58
Capacity
Indicator For
Rechargeable
Batteries –
Page 80
89 Ask Silicon Chip
94 Market Centre
96 Advertising Index
SEPTEMBER 1998 1
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