Silicon ChipContents - April 1988 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Those wonderful op amps; they're so versatile
  4. Vintage Radio: How it Began by John Hill
  5. Feature: What is Negative Feedback? by Bryan Maher
  6. Feature: The Way I See It by Neville Williams
  7. Project: Headphone Amplifier for CD Players by John Clarke
  8. Project: Walkaround Throttle for Model Railroads by Leo Simpson & John Clarke
  9. Project: Build a Slave Flash Trigger by John Clarke & Greg Swain
  10. Serviceman's Log: Beating an intermittent by The Original TV Serviceman
  11. Project: A pH Meter For Swimming Pools by John Clarke & Leo Simpson
  12. Subscriptions
  13. Feature: Amateur Radio by Garry Cratt, VK2YBX
  14. Feature: The Evolution of Electric Railways by Bryan Maher
  15. Feature: Digital Fundamentals, Pt.6 by Louis E. Frenzel
  16. Market Centre
  17. Advertising Index
  18. Outer Back Cover

This is only a preview of the April 1988 issue of Silicon Chip.

You can view 42 of the 96 pages in the full issue, including the advertisments.

For full access, purchase the issue for $10.00 or subscribe for access to the latest issues.

Articles in this series:
  • Vintage Radio: How it Began (March 1988)
  • Vintage Radio: How it Began (April 1988)
Articles in this series:
  • What is Negative Feedback? (April 1988)
  • What is Negative Feedback? (June 1988)
  • What is Negative Feedback? (July 1988)
  • What Is Negative Feedback? (September 1988)
Articles in this series:
  • The Way I See It (November 1987)
  • The Way I See It (December 1987)
  • The Way I See It (January 1988)
  • The Way I See It (February 1988)
  • The Way I See It (March 1988)
  • The Way I See It (April 1988)
  • The Way I See It (May 1988)
  • The Way I See It (June 1988)
  • The Way I See it (July 1988)
  • The Way I See It (August 1988)
  • The Way I See It (September 1988)
  • The Way I See It (October 1988)
  • The Way I See It (November 1988)
  • The Way I See It (December 1988)
  • The Way I See It (January 1989)
  • The Way I See It (February 1989)
  • The Way I See It (March 1989)
  • The Way I See It (April 1989)
  • The Way I See It (May 1989)
  • The Way I See It (June 1989)
  • The Way I See It (July 1989)
  • The Way I See It (August 1989)
  • The Way I See It (September 1989)
  • The Way I See It (October 1989)
  • The Way I See It (November 1989)
  • The Way I See It (December 1989)
Items relevant to "Walkaround Throttle for Model Railroads":
  • Silicon Chip article scan, April 1988 - Walkaround Throttle For Model Railroads Pt 1 (AUD $10.00)
  • Silicon Chip article scan, May 1988 - Walkaround Throttle For Model Railroads Pt 2 (AUD $10.00)
  • Silicon Chip article scan, April 1988 - Walkaround Throttle For Model Railroads Pt 1 (AUD $10.00)
Articles in this series:
  • Walkaround Throttle for Model Railroads (April 1988)
  • Walkaround Throttle for Model Railroads, Pt.2 (May 1988)
Articles in this series:
  • Amateur Radio (November 1987)
  • Amateur Radio (December 1987)
  • Amateur Radio (February 1988)
  • Amateur Radio (March 1988)
  • Amateur Radio (April 1988)
  • Amateur Radio (May 1988)
  • Amateur Radio (June 1988)
  • Amateur Radio (July 1988)
  • Amateur Radio (August 1988)
  • Amateur Radio (September 1988)
  • Amateur Radio (October 1988)
  • Amateur Radio (November 1988)
  • Amateur Radio (December 1988)
  • Amateur Radio (January 1989)
  • Amateur Radio (April 1989)
  • Amateur Radio (May 1989)
  • Amateur Radio (June 1989)
  • Amateur Radio (July 1989)
  • Amateur Radio (August 1989)
  • Amateur Radio (September 1989)
  • Amateur Radio (October 1989)
  • Amateur Radio (November 1989)
  • Amateur Radio (December 1989)
  • Amateur Radio (February 1990)
  • Amateur Radio (March 1990)
  • Amateur Radio (April 1990)
  • Amateur Radio (May 1990)
  • Amateur Radio (June 1990)
  • Amateur Radio (July 1990)
  • The "Tube" vs. The Microchip (August 1990)
  • Amateur Radio (September 1990)
  • Amateur Radio (October 1990)
  • Amateur Radio (November 1990)
  • Amateur Radio (December 1990)
  • Amateur Radio (January 1991)
  • Amateur Radio (February 1991)
  • Amateur Radio (March 1991)
  • Amateur Radio (April 1991)
  • Amateur Radio (May 1991)
  • Amateur Radio (June 1991)
  • Amateur Radio (July 1991)
  • Amateur Radio (August 1991)
  • Amateur Radio (September 1991)
  • Amateur Radio (October 1991)
  • Amateur Radio (November 1991)
  • Amateur Radio (January 1992)
  • Amateur Radio (February 1992)
  • Amateur Radio (March 1992)
  • Amateur Radio (July 1992)
  • Amateur Radio (August 1992)
  • Amateur Radio (September 1992)
  • Amateur Radio (October 1992)
  • Amateur Radio (November 1992)
  • Amateur Radio (January 1993)
  • Amateur Radio (March 1993)
  • Amateur Radio (May 1993)
  • Amateur Radio (June 1993)
  • Amateur Radio (July 1993)
  • Amateur Radio (August 1993)
  • Amateur Radio (September 1993)
  • Amateur Radio (October 1993)
  • Amateur Radio (December 1993)
  • Amateur Radio (February 1994)
  • Amateur Radio (March 1994)
  • Amateur Radio (May 1994)
  • Amateur Radio (June 1994)
  • Amateur Radio (September 1994)
  • Amateur Radio (December 1994)
  • Amateur Radio (January 1995)
  • CB Radio Can Now Transmit Data (March 2001)
  • What's On Offer In "Walkie Talkies" (March 2001)
  • Stressless Wireless (October 2004)
  • “Degen” Synthesised HF Communications Receiver (January 2007)
  • WiNRADiO: Marrying A Radio Receiver To A PC (January 2007)
  • PICAXE-08M 433MHz Data Transceiver (October 2008)
  • Half-Duplex With HopeRF’s HM-TR UHF Transceivers (April 2009)
  • Dorji 433MHz Wireless Data Modules (January 2012)
Articles in this series:
  • The Evolution of Electric Railways (November 1987)
  • The Evolution of Electric Railways (December 1987)
  • The Evolution of Electric Railways (January 1988)
  • The Evolution of Electric Railways (February 1988)
  • The Evolution of Electric Railways (March 1988)
  • The Evolution of Electric Railways (April 1988)
  • The Evolution of Electric Railways (May 1988)
  • The Evolution of Electric Railways (June 1988)
  • The Evolution of Electric Railways (July 1988)
  • The Evolution of Electric Railways (August 1988)
  • The Evolution of Electric Railways (September 1988)
  • The Evolution of Electric Railways (October 1988)
  • The Evolution of Electric Railways (November 1988)
  • The Evolution of Electric Railways (December 1988)
  • The Evolution of Electric Railways (January 1989)
  • The Evolution Of Electric Railways (February 1989)
  • The Evolution of Electric Railways (March 1989)
  • The Evolution of Electric Railways (April 1989)
  • The Evolution of Electric Railways (May 1989)
  • The Evolution of Electric Railways (June 1989)
  • The Evolution of Electric Railways (July 1989)
  • The Evolution of Electric Railways (August 1989)
  • The Evolution of Electric Railways (September 1989)
  • The Evolution of Electric Railways (October 1989)
  • The Evolution of Electric Railways (November 1989)
  • The Evolution Of Electric Railways (December 1989)
  • The Evolution of Electric Railways (January 1990)
  • The Evolution of Electric Railways (February 1990)
  • The Evolution of Electric Railways (March 1990)
Articles in this series:
  • Digital Fundamentals, Pt.1 (November 1987)
  • Digital Fundamentals, Pt.2 (December 1987)
  • Digital Fundamnetals, Pt.3 (January 1988)
  • Digital Fundamentals, Pt.4 (February 1988)
  • Digital Fundamentals Pt.5 (March 1988)
  • Digital Fundamentals, Pt.6 (April 1988)
  • Digital Fundamentals, Pt.7 (May 1988)
  • Digital Fundamentals, Pt.8 (June 1988)
  • Digital Fundamentals, Pt.9 (August 1988)
  • Digital Fundamentals, Pt.10 (September 1988)
APRIL 1988 FEATURES 6 Vintage Radio: How it Began by John Hill Pt.2: the early days of broadcasting 10 What is Negative Feedback? by Bryan Moher Pt.1: Negative feedback & control systems 15 Arista 2-Way Loudspeaker System by Leo Simpson Good sound at a fair price 74 The Evolution of Electric Railways by Bryan Moher Pt.6 - The Sydney & Blue Mountains Systems 81 Digital Fundamentals, Pt.6 by Louis Frenzel Combinational logic circuits OUR NEW HEADPHONE amplifier lets you listen to your CD player direct, without degrading sound quality. Construction begins on page 28, PROJECTS TO BUILD 28 Headphone Amplifier for CD Players by John Clarke Low-cost design delivers excellent sound quality 32 Walkaround Throttle for Model Railroads by Leo Simpson Pulse power unit has inertia and memory 47 Build a Slave Flash Trigger by Greg Swain Simple unit for multiple flash work 60 A pH Meter For Swimming Pools by John Clarke Can also check fish tanks and soil acidity SPECIAL COLUMNS 16 The Way I See It by Neville Williams Audio power ratings - right back where we sta rted from 54 Serviceman's Log by the original TV serviceman Beating an intermittent when the heat's on 67 Amateur Radio by Garry Cratt Mobile antennas for the VHF & UHF bands DEPARTMENTS 2 Publisher's Letter 3 Mailbag 92 Product Showcase 94 Ask Silicon Chip 4 News & Views 96 Market Centre 50 Circuit Notebook THIS WALK-AROUND THROTTLE for model railroads features pulse power, inertia, braking, full overload protection, and excellent speed regulation. Details page 32. WHEN YOUR camera's f]ash fires, this simple project will automatically trigger a slave f]ashgun. See page 47. ~, / , '.\' .. . ·'·,· . .. "" " Making your-own antennas for VHF and UHF mobile operation is easy. Our amateur radio column on page 67 shows you how. A l'llll.'1988 ·1