Silicon ChipMarket Centre - October 1990 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Thank you for your enthusiastic response
  4. Feature: Danger - Polychloriated Biphenyls by Marque Crozman
  5. Vintage Radio: The different types of radio valves by John Hill
  6. Feature: Win A Bose Lifestyle Music System
  7. Project: Build The SurfSound Simulator by Darren Yates
  8. Review: The Bose Lifestyle Music System by Leo Simpson
  9. Project: Low Cost Siren For Burglar Alarms by Leo Simpson
  10. Serviceman's Log: If only I'd known all the symptoms by The TV Serviceman
  11. Project: DC Offset For Digital Multimeters by John Clarke
  12. Project: Dimming Controls For The Discolight by John Clarke
  13. Feature: Amateur Radio by Garry Cratt, VK2YBX
  14. Subscriptions
  15. Order Form
  16. Feature: Computer Bits by Jennifer Bonnitcha
  17. Feature: The Story Of Electrical Energy; Pt.4 by Bryan Maher
  18. Back Issues
  19. Feature: Remote Control by Bob Young
  20. Market Centre
  21. Advertising Index
  22. Outer Back Cover

This is only a preview of the October 1990 issue of Silicon Chip.

You can view 62 of the 120 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.

Items relevant to "Dimming Controls For The Discolight":
  • Silicon Chip article scan, October 1990 - Discolight Dimming Controls (AUD $10.00)
Articles in this series:
  • Build the Discolight (July 1988)
  • Building the Discolight, Pt.2 (August 1988)
  • Dimming Controls For The Discolight (October 1990)
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:
  • Computer Bits (July 1989)
  • Computer Bits (August 1989)
  • Computer Bits (September 1989)
  • Computer Bits (October 1989)
  • Computer Bits (November 1989)
  • Computer Bits (January 1990)
  • Computer Bits (April 1990)
  • Computer Bits (October 1990)
  • Computer Bits (November 1990)
  • Computer Bits (December 1990)
  • Computer Bits (January 1991)
  • Computer Bits (February 1991)
  • Computer Bits (March 1991)
  • Computer Bits (April 1991)
  • Computer Bits (May 1991)
  • Computer Bits (June 1991)
  • Computer Bits (July 1991)
  • Computer Bits (August 1991)
  • Computer Bits (September 1991)
  • Computer Bits (October 1991)
  • Computer Bits (November 1991)
  • Computer Bits (December 1991)
  • Computer Bits (January 1992)
  • Computer Bits (February 1992)
  • Computer Bits (March 1992)
  • Computer Bits (May 1992)
  • Computer Bits (June 1992)
  • Computer Bits (July 1992)
  • Computer Bits (September 1992)
  • Computer Bits (October 1992)
  • Computer Bits (November 1992)
  • Computer Bits (December 1992)
  • Computer Bits (February 1993)
  • Computer Bits (April 1993)
  • Computer Bits (May 1993)
  • Computer Bits (June 1993)
  • Computer Bits (October 1993)
  • Computer Bits (March 1994)
  • Computer Bits (May 1994)
  • Computer Bits (June 1994)
  • Computer Bits (July 1994)
  • Computer Bits (October 1994)
  • Computer Bits (November 1994)
  • Computer Bits (December 1994)
  • Computer Bits (January 1995)
  • Computer Bits (February 1995)
  • Computer Bits (March 1995)
  • Computer Bits (April 1995)
  • CMOS Memory Settings - What To Do When The Battery Goes Flat (May 1995)
  • Computer Bits (July 1995)
  • Computer Bits (September 1995)
  • Computer Bits: Connecting To The Internet With WIndows 95 (October 1995)
  • Computer Bits (December 1995)
  • Computer Bits (January 1996)
  • Computer Bits (February 1996)
  • Computer Bits (March 1996)
  • Computer Bits (May 1996)
  • Computer Bits (June 1996)
  • Computer Bits (July 1996)
  • Computer Bits (August 1996)
  • Computer Bits (January 1997)
  • Computer Bits (April 1997)
  • Windows 95: The Hardware That's Required (May 1997)
  • Turning Up Your Hard Disc Drive (June 1997)
  • Computer Bits (July 1997)
  • Computer Bits: The Ins & Outs Of Sound Cards (August 1997)
  • Computer Bits (September 1997)
  • Computer Bits (October 1997)
  • Computer Bits (November 1997)
  • Computer Bits (April 1998)
  • Computer Bits (June 1998)
  • Computer Bits (July 1998)
  • Computer Bits (November 1998)
  • Computer Bits (December 1998)
  • Control Your World Using Linux (July 2011)
Articles in this series:
  • The Technology Letters, Pt.2 (January 1989)
  • The Story Of Electrical Energy (July 1990)
  • The Story Of Electrical Energy; Pt.2 (August 1990)
  • The Story Of Electrical Energy; Pt.3 (September 1990)
  • The Story Of Electrical Energy; Pt.4 (October 1990)
  • The Story Of Electrical Energy; Pt.5 (November 1990)
  • The Story Of Electrical Energy; Pt.6 (December 1990)
  • The Story Of Electrical Energy; Pt.7 (January 1991)
  • The Story Of Electrical Energy; Pt.8 (February 1991)
  • The Story Of Electrical Energy; Pt.9 (March 1991)
  • The Story Of Electrical Energy; Pt.10 (May 1991)
  • The Story Of Electrical Energy; Pt.11 (July 1991)
  • The Story Of Electrical Energy; Pt.12 (August 1991)
  • The Story Of Electrical Energy; Pt.13 (September 1991)
  • The Story Of Electrical Energy; Pt.14 (October 1991)
  • The Story Of Electrical Energy; Pt.15 (November 1991)
  • The Story Of Electrical Energy; Pt.16 (December 1991)
  • The Story Of Electrical Energy; Pt.17 (January 1992)
  • The Story Of Electrical Energy; Pt.18 (March 1992)
  • The Story Of Electrical Energy; Pt.19 (August 1992)
  • The Story of Electrical Energy; Pt.20 (September 1992)
  • The Story Of Electrical Energy; Pt.21 (November 1992)
  • The Story Of Electrical Energy; Pt.22 (January 1993)
  • The Story of Electrical Energy (April 1993)
  • The Story Of Electrical Energy; Pt.24 (May 1993)
  • The Story Of Electrical Energy; Pt.24 (June 1993)
Articles in this series:
  • Remote Control (October 1989)
  • Remote Control (November 1989)
  • Remote Control (December 1989)
  • Remote Control (January 1990)
  • Remote Control (February 1990)
  • Remote Control (March 1990)
  • Remote Control (April 1990)
  • Remote Control (May 1990)
  • Remote Control (June 1990)
  • Remote Control (August 1990)
  • Remote Control (September 1990)
  • Remote Control (October 1990)
  • Remote Control (November 1990)
  • Remote Control (December 1990)
  • Remote Control (April 1991)
  • Remote Control (July 1991)
  • Remote Control (August 1991)
  • Remote Control (October 1991)
  • Remote Control (April 1992)
  • Remote Control (April 1993)
  • Remote Control (November 1993)
  • Remote Control (December 1993)
  • Remote Control (January 1994)
  • Remote Control (June 1994)
  • Remote Control (January 1995)
  • Remote Control (April 1995)
  • Remote Control (May 1995)
  • Remote Control (July 1995)
  • Remote Control (November 1995)
  • Remote Control (December 1995)
CENIRF. Cash in your surplus gear. Advertise it here in Silicon Chip. CLASSIFIED ADVERTISING COUPON 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 Bo x number, you must include your permanent address and phone number for our files . We cannot accept ads submitted without th is information. To run your own classified ad , put or.e word on each of the lines below and send this form with you r payment to Silicon Chip Classifieds , PO Box 139, Collaroy Beach, NSW 2097. 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ($7 00) 16 ($740) 17 ($7 80) 18 ($8 20) 19 ($8 60) 20 ($9 00) 23 ($10 20) 24 ($10 60) 25 ($11 00) 22 ($9 80) Name. · · ••· ••· · ··· · ·· · · · · ·· ·· ·•· •·•· Street ·· ······ ····· ······· •· · ··· ····· ········· ·· ··· ····· ···•" ' .. .... ........... ..... ... Postcode Suburb/Town Enclosed is my cheque or money order tor$ .... D Bankcard D Visa Card D . . . . . . . .. .. . .. . . . . . . or please debit my MasterCard Signature .... Card expiry date ..... .J . . FAX THIS COUPON WITH YOUR CRFDIT CARD DETAILS TO (02) 979 . 6503 BWD DUAL TRACE Model 830 oscilloscope with probes. Good condition. $950.00. Phone (02) 602 2408 (business hours). GOLD COAST TV & VIDEO business for sale . Phone Mark: (075) 91 6445 or AH 94 6105. WEATHER FAX programs for IBM XT/ATs * * * "RADFAX2" is a high resolution, shortwave weather fax, Morse & RTTY receiving program . Needs CGA, SSB HF radio & Radfax decoder. Also "RF2HERC", "RF2EGA" & "RF2VGA", same as RADFAX2 but suitable for Hercules, EGA & VGA cards respectively. $35. From quality UK manufacturers. Available from stock at discount prices, 15VA to 625VA. Send SSAE for data & prices to: Transformer Discounters, PO Box 542, Wahroonga 2076. PLEASE PRINT EACH WORD SEPARATELY, IN BLOCK LETTERS 21 ($940) TOROID POWER TRANSFORMERS * * * "SATFAX" is a NOAA, Meteor & GMS weather satellite picture receiving program. Uses EGA & VGA modes, needs EGA or VGA colour monitor & card, plus "WEATHER FAX" PC card. $45. * * * All programs are on 5.25-inch or 3.5-inch discs (state which) & include documentation. Add $3 postage . ONLY from M. Delahunty, 42 Villiers St, New Farm, Old 4005. Phone (07) 358 2785 . MY AUSTRALIAN designed low cost super fast Z80 micro-controller development system has gained acceptance already with educational institutions. Pop it on the end of any PC MSDOS or Z80 machine and away you go. Boards, EPROM and 360K disk $76 including postage for a short form kit. Gee , I wish I had this when I was a kid. For more info . send a 41 c stamp to Don McKenzie, 29 Ellesmere Crescent, Tullamarine , 3043. KITS AVAILABLE FOR the ETI Digi1 25 $17.95 plus $2 .50 p&p. Heatsink not supplied. Kits built and repaired . Repairs to radio control equipment. Model railway projects ti _;signed and built. Prototype and production board supplier to the hobbyist . Supplier of PCBs for projects in SILICON CHIP . Electronic Toy Services (08) 382 8919 . DIGIT AL WAVEFORM GENERATION: as described in SILICON CHIP in March, May, June & July 1990. PC board and software to generate waveforms. Both for only $39.95 including p&p. Instructions included. PC Board $16.00, Software $32.50 including postage. Send cheque or money order to M. Radvanyi, PO Box 49, Kingswood, NSW, 2750. ANTIQUE RADIO ANTIQUE RADIO RESTORATIONS. Your one-stop electronic repair shop. Specialising in restoring vintage radios including chassis rewiring, quality new parts, valves, valve sockets, speakers, transformers, cabinet restoration . Quality secondhand radio dials & parts for most brands & models. About 400 radios in stock for restoration & parts. Every restored wireless is covered by a 2-year warranty on parts & service . French polishing of timber cabinets available. Vintage car radios in valve & transistor types available for restora- OCTOBER 1990 119 0 ► ..I a. a. Cl) ..1 N CD ::::, w ►~ IC') 'oi ,.._ 0 0 ~ a. C a: (,) c..o w3~ ~ ow cii a. Cl) -5 w a: £ Cl) CD (,) >< ~ CU Z LL 0 r,..~ (.) I(/) Cl C 1- en (,) ,- Ill o::r- ..1 0 • 0 c. ,c MEMORY EXPANSION 9x4MB - 120ns 1OOns 80ns 70ns 60ns 1OOns 80ns ?Ons 80ns ?Ons 8Dns 25.00 26.00 27.00 30.00 35.00 87.00 89.00 95 .00 86.00 91.00 550.00 DRAM/DIP 4164 41256 41464 4x256 1MB -1 OOns - 80ns - 80ns -80ns - 80ns 2.50 2.70 2.90 9.00 9.00 9x1MB 8x1MBMAC II) wr::1- g c5a: ..c: (I) () Cl) -~ Cl) II) a: ,- CD ~ -~ ,.._ "C CD 0 ◄ CD,.._ CD $ Cl) :I l:i :i CD :;; 0 §, = 0 ·:c a: 0. E 8: c.. 0. 0. (/) (,) 0 ::::, :::, CD SIMM & SIP 9x256 o::I' .c 0- !: 3 Cl) Advertising Index 1- (/) CO-PROCESSORS 8087-2 80287-10 80C287-12 387SX-16 387DX-16 387SX-20 387DX-20 387DX-25 387DX-33 387SX-16 387DX-2D 387DX-33 INTEL 175.00 308.00 390.00 435.0D 478.00 490 .DO 538.00 680.DO 835.00 CYRIX 400.00 490.00 75D.OO WEITEK 820 .00 1010.00 1500.00 1780.00 3167-2D 3167-33 4167-25 4167-33 Prices at August 28th T1000SE T1600 T31OOSe T31 ODSX T3200SX T3200 T5100 T5200 TOSHIBA LAPTOP 2MB 2MB 2MB 2MB 2MB 3MB 2MB 2MB 515.00 370.00 370.00 370.00 370.00 615.00 370.00 370.00 COMPAQ 386-20, 386 -25, 386-20e 386-S, 386-33 4MB MODULES 4MB BOARDS 680 .00 798.00 IBM PS/2 2MB 2MB 2MB 25D.OO 290.00 29D.DD 30/286,50 7DE61, 121 7DA21 Sales Tax 20%. Overnight delivery. Credit cards welcome. Suite 205/83 Longueville Road, Lane Cove 2066. PELHAM Tel (02) 427 0011 Fax (02) 418 6831/428 5460 ,c:-4s,-~ COPROCESSORS 2C-08 2C87-8MHz 2C-10 2C87-10MHz 2C-12 2C87-12MHz 2C-20 2C87-20MHz 2C-20H HYPERBOARD 3C-16 3C87-16MHz 3C-20 3C87-20MHz 3C-25 3C87-25MHz 3C-33 3C87-33MHz JILOA (TECHNIKIT DIV.) 'Ii "o ~{~ 476 528 618 645 130 890 915 1148 1380 Ss PO Box 73, Glenhuntly, Vic. 3163. Phone(03)571 6303. FIVE YEAR WARRANTY CAD CONNECTION PHONE (02) 957 6719 FAX (02) 954 5550 CONNECTION llnpf'oving YDUI' Pr udivity tion. Repairs done on tape decks, amplifiers, TVs & videos. Open Sat. 1Oam-5pm; Sun. 12 .30-5pm. 109 Cann St, Bass Hill, NSW 2197. Phone (02) 645 3173 BH or (02) 726 1613 ~- 120 ~ SILICON CHIP ACTIVE SHORTWAVE ANTENNA (SILICON CHIP, Jan. 1990). Complete kit $59 ; built & tested $119; case $1 O. LOOP ANTENNA. Improve signal strength & quality with this portable antenna. Kit $44; Fully built $69. FIX-A-KIT $20 PER HOUR LABOUR NO CHARGE FOR KITS THAT CAN'T BE REPAIRED 3 MONTHS WARRANTY ON REPAIRS CONSTRUCTION AVAILABLE HYCAL INSTRUMENTS DESIGN, MANUFACTURE, REPAIR OF ELECTRONIC EQUIPMENT (02) 633 5897 Adroit Electronics ... ... ..... ... 1 20 Altronics ...... .... ........ .. .... 5 7 -61 Arista .............. ... .. .. ....... .... . 20 Back Issues ............... 108,109 Board Solutions .. .......... .. 30,31 Bose Australia .......... ...... 22,23 Cad Connection .... .. .......... 120 David Reid Electronics .. .. .. IFC, 1 90,91 Dick Smith Electronics .. ..... 9-1 5 Electronic Solutions ........ 64,65 Electronics World .. .... ....... ..... 5 Elmeasco .......... .. ........ 21 , 1 04 Force Electronics ....... 110,111 Geoff Wood Electronics .... .. 107 Harbuch Electronics ........... .. 33 Hycal Instruments ........ ...... 1 20 Jaycar Electronics .. .... .... 34-37 78-81 Jiloa ............................ ..... 120 J.V. Tuners .................. .. ..... 55 Oatley Electronics ............... 69 Pacific Microelectronics ...... 1 00 PC Marketplace .................. IBC Pelham ............................ . 120 Philips .................. 99 ,100,101 Procon Technology .. ............ 55 ACS Radio .. .......... .... ....... . 1 05 Resurrection Radio .. .. .. .. .. .. .. 1 9 Rod Irving Electronics .... . 46,4 7 70,71,114,115 Silicon Chip Binders ...... .... OBC Silicon Chip Subscriptions .. ... 79 Setec Pty Ltd .. .. .. .. .. .. .. .. . .. .. . 21 Sound Australia ...... .... ....... 1 06 Subscriptions ................. 85,86 Tech-Fast .... .. .. ............... .. .. 93 Transformer Discounters .... 11 9 PC Boards Printed circuit boards for SILICON CHIP projects are made by: • Electronic Toy Services, 2/111 Glynville Drive, Hackham West, SA 5163. Phone (08) 382 8919. • Jemal Products, 5 Forge St, Welshpool, WA 6106. Phone (09) 350 5555. • Marday Services, PO Box 19-189, Avondale, Auckland , NZ. Phone 88 5730. • ACS Radio Pty Ltd, 651 Forest Rd, Bexley, NSW 2207 . Phone (02) 587 3491 .