Silicon ChipAdvertising Index - March 1988 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Tell us what you like and what you don't like
  4. Feature: New Life for Radio-Cassette Players by Homer Davidson
  5. Vintage Radio: How it Began by John Hill
  6. Review: Tandy's CD-1500 CD Player by Leo Simpson
  7. Project: Line Grabber for Telephones by John Clarke & Greg Swain
  8. Project: Remote Switch For Car Burglar Alarms by John Clarke
  9. Project: Endless Loop Tape Player by Greg Swain
  10. Project: Technilab 301 Function Generator by David Whitby
  11. Serviceman's Log: A baffling exercise by The Original TV Serviceman
  12. Project: Old-Time Crystal Radio by John Hill
  13. Project: Build Your Own Light Box by Leo Simpson
  14. Subscriptions
  15. Feature: Amateur Radio by Garry Cratt, VK2YBX
  16. Feature: The Way I See It by Neville Williams
  17. Feature: The Evolution of Electric Railways by Bryan Maher
  18. Feature: Digital Fundamentals Pt.5 by Louis E. Frenzel
  19. Market Centre
  20. Advertising Index
  21. Outer Back Cover

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

You can view 34 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)
Items relevant to "Technilab 301 Function Generator":
  • Silicon Chip article scan, March 1988 - Technilab 301 Function Generator (AUD $10.00)
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 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)
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)
CEl.1'1' Cash in your sqrplus gear. Advertise it here in Silicon Chip. Advertising rates for this page: Classified ads - $7.00 for up to 15 words plus 40 cents for each additional word; Display ads (casual rate) - $20 per column centimetre (max. 10cm). Closing date: five weeks prior to month of sale. If you use a PO Box number, you must include your permanent address and phone number for our files. We cannot accept ads submitted without this information. To run your own classified ad, put one word on each of the lines below and send this form with your payment to: Silicon Chip Classifieds, PO Box 139, Collaroy Beach, NSW 2097. PLEASE PRINT EACH WORD SEPARATELY, IN BLOCK LETTERS 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ($7.00) 16 ($7.40) 17 ($7.80) 18 ($8.20) 19 ($8.60) 20 ($9.00) Advertisers Index Our advertisers are vital to t.he success of SILICON CHIP. Please give them your support. Altronics .. .. ... ....... .. ... ....... 22-25 Arista Electronics .... .. ... ... .. .. ... 73 Ballarat Electronic Supplies ..... 59 Dick Smith Electronics .. .. .. 36,37, 66,67 Elmeasco .... ........ .. .. ... .. .. .... . IFC Emona Instruments ...... .. .... .. .. 91 Geoff Wood Electronics ..... .. .. . 11 Jaycar Electronics .. .. .. ...... 48,49 RCS Radio .. .... .. ........ .... ....... . 55 Tandy Electronics .. .............. . IBC VSI Electronics ................... OBC PC Boards 21 ($9.40) 22 ($9.80) 23 ($10.20) 24 ($10.60) 25 ($11.00) Name ... ...... ....... .. ... ......... ... ...... .......... .... .. ... ...... ... •··· ···•· ··· ··· ··· ···· ···· ······ ····· ··•· Address ... ... ........ ..... ................ ..... ...... .. .............. ... ..... .. .. . . Suburb/Town ..... ........ .. ....... ....... ....... .... ..... .... ....... .. ....... . ... Postcode ... .... .... ..... . Enclosed is my cheque or money order for $ ........ .. ...... .. ... .. ..... ....... or please debit my Bankcard □ Visa □ Card No ...... .. .......... .. .... ........ ... ..... ..... ..... ....... .... ... . Signature .. ............... ... .. ..... ..... .. ........... ..... Ask Silicon Chip continued from page 95 from stores such as Jaycar, Dick Smith Electronics and Altronics. The above really answers your question in full but your letter does raise a few points of interest. First, as noted in these pages last month, the 100W module described in December 1987 will not run safely with supply voltages much above its nominal ± 40V DC. Second, it is not really intended for driving an output transformer. To do so, it would require flyback diodes (such as 1N5404) across each output transistor (ie, each diode reverse biased). The diodes safely damp any spikes which would otherwise be generated by the transformer's inductance when the amplifier is driven into clipping (or if the protection circuits operate). The amplifier should also incorporate a trimpot adjustment to minimise any residual DC output 96 SILICON CHIP voltage which would cause direct current to flow in the transformer. By the way, we suspect that the output transformers in your Millbank amplifier are autotransformers which can be configured for 50V or 100V lines. This means that your amplifier is mainly intended for public address applications. The 100V (or 50V) output is intended for driving lots of small speakers in parallel with its own step down transformer. The idea is to keep on adding speakers, of say 5-watt rating, until the amplifier is fully loaded. Thus, a 200W amplifier with 100V lines could drive 40 5 watt speakers. If readers are interested in a 100W public address amplifier with suitable microphone and mixing facilities, we would like to know about it. If there is enough interest, we'll do it. ~ Printed circuit boards for SILICON CHIP projects are made by: • RCS Radio Pty Ltd, 651 Forest Rd, Bexley, NSW 2207 . Phone (02) 587 3491 . • Jemal Products, 5 Forge St, Kewdale, WA 6105. Phone (09) 451 8726 . Notes & Corrections Capacitance Adapter for DMMs, Nov. 1987: to give more range of calibration adjustment, trimpot VRl should be changed to 200k0 and the associated 120k0 resistor reduced to 47k0. 24V to 12V Converter, Dec. 1987: the wiring diagram on page 31 shows the lOOJLF capacitor (associated with D9) incorrectly polarised. The circuit diagram on page 30 is correct. To provide crowbar overvoltage protection in the event of a circuit mishap, connect a 15V 5W or 20W zener diode across the 13.6V output. The zener's anode should connect to the positive output terminal. If the output voltage exceeds 15V the zener will conduct heavily and blow the fuse. The zener may also fuse and become short-circuit. Note: Jaycar Electronics can supply a 15V 5W zener diode, type 1N5352B, which would be suitable for this application.