OCTOBER 1 989
THIS FM RADIO INTERCOM
can provide communications
between motorbike riders or can
be used in power boats, rally
cars or open cockpit aircraft.
See page 20.
FEATURES
16 Making You r Electric Radiator Safe by Leo Simpson
Replace that inadequate cord & plug
98 The Technology Letters
by Richard Kopf
More adventures in America
104 The Evolution of Electric Railways by Bryan Maher
Pt.24: A look at Australian monorails
PROJECTS TO BUILD
20 FM Radio Intercom For Motorbikes by John Clarke
Can also be used in power boats & rally cars
32 The Gladesville GaAsFet Amplifier by 'Julie' Kentwell
Easy-to-build design for amateur TV
40 1-Megabyte Printer Buffer by Don McKenzie
Frees your computer during file printouts
58 2-Chip Portable AM Stereo Radio by Steve Payor
Pt.2: construction details
LAST MONTH-, WE described
the circuit details of our exciting
new stereo AM radio. This
month, we show you how to
build it. See page 58.
I
SPECIAL COLUMNS
"~
4 Remote Control
10
50
76
84
86
by Bob Young
The beginnings of remote control
Vintage Rad io by John Hill
Collectables & non-collectables
Serviceman's Log by the TV serviceman
"Bar humbug!" - as Scrooge would say
Computer Bits by Jennifer Bonnitcha
Installing a hard disc in the IBM PC
Amateur Radio by Garry Cratt
SWR - just how important is it?
The Way I See It by Neville Williams
Today they're tagging animals; tomorrow it might be humans!
-· =1=\
_I
NO! - THE SERVICEMAN
didn't stick his head in the oven
this month. But he did use a
head tester. Why? All is
revealed starting page 50.
DEPARTMENTS
2 Publisher's Letter
3 Mailbag
55 Bookshelf
67 Back Issues
74 Circuit Notebook
91 Subscription Page
Product Showcase
Ask Silicon Chip
Notes & Errata
Market Centre
92
110
111
112
THERE'S NO NEED to tie your
computer up for long periods
when printing out files. This
easily built 1Mb printer buffer
will free your computer for
those other tasks. Turn to
page 40.
OCTOBER 1989
1