Fullscreen HTML5Med Res (??MB)HTML4

Contents Vol.15, No.7; July 2002 www.siliconchip.com.au FEATURES 7 Victoria’s Solar Power Tower: A World First? It’s 1000 metres tall, sits on top of a massive greenhouse and will generate 200MW of electricity. And it could be built in Victoria – by Sammy Isreb 30 Applications For Fuel Cells Third article in our series looks at the advantages and applications of fuel cells – by Gerry Nolan 65 Review: Tektronix TDS 2022 Colour Oscilloscope It boasts a colour LCD screen, measures to 200MHz is very easy to drive. And it’s all packed into a remarkably compact case – by Leo Simpson Victoria’s Proposed 200MW Solar Power Tower – Page 7. PROJECTS TO BUILD 10 Telephone Headset Adaptor Keep your hands free with this simple low-cost project. It can be used with any phone that uses RJ11 modular plugs and sockets – by John Clarke 18 A Rolling Code 4-Channel UHF Remote Control It has a long range, its rolling code is virtually unbreakable, it uses a keyring transmitter and it’s ideal for use with garage door controllers – by Ross Tester 56 Remote Volume Control For The Ultra-LD Amplifier Revised preamp board lets you add our Remote Volume Control unit to the Ultra-LD Stereo Amplifier – by John Clarke & Greg Swain 70 Direct Conversion Receiver For Radio Amateurs; Pt.1 Rolling Code 4-Channel UHF Remote Control – Page 18. It covers from 7-7.3MHz, can tune both Morse and SSB signals and reads out the tuned frequency in Morse code! – by Leon Williams COMPUTERS 68 Creating Your Own Rules For Tiny Personal Firewall Tiny Personal Firewall lets you create your own tightly-defined packet filtering rules. Here’s how to go about it – by Greg Swain Revised Preamp With Remote Volume Control For The Ultra-LD Stereo Amplifier – Page 56. SPECIAL COLUMNS 40 Serviceman’s Log If it look’s easy, it probably isn’t – by the TV Serviceman 80 Vintage Radio The Airzone 500 series receivers – by Rodney Champness DEPARTMENTS 2 4 25 36 53 Publisher’s Letter Mailbag Subscriptions Form Circuit Notebook Product Showcase www.siliconchip.com.au 55 86 89 94 96 Silicon Chip Weblink Ask Silicon Chip Notes & Errata Market Centre Advertising Index Direct Conversion Receiver For Radio Amateurs – Page 62. July 2002  1