Silicon ChipMarket Centre - November 1990 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Things go better with natural gas
  4. Feature: How To Connect Two TVs To One VCR by Jim Lawler
  5. Feature: Introduction To Digital Electronics by Joseph Carr
  6. Project: Battery Powered Laser Pointer by Leo Simpson
  7. Feature: Win A Bose Lifestyle Music System
  8. Vintage Radio: Testing old radio valves by John Hill
  9. Project: Low-Cost Model Train Controller by Greg Swain
  10. Serviceman's Log: The customer takes a holiday by The TV Serviceman
  11. Project: A Really Snazzy Egg Timer by Darren Yates
  12. Feature: Amateur Radio by Garry Cratt, VK2YBX
  13. Project: Build A 1.5V To 9V DC Converter by Darren Yates
  14. Project: Modifications To The 16-Channel Mixer by Silicon Chip
  15. Feature: Computer Bits by Jennifer Bonnitcha
  16. Back Issues
  17. Feature: The Story Of Electrical Energy; Pt.5 by Bryan Maher
  18. Feature: Remote Control by Bob Young
  19. Feature: Turn Your CRO Into A Spectrum Analyser by Alex Eades
  20. Subscriptions
  21. Order Form
  22. Market Centre
  23. Advertising Index
  24. Outer Back Cover

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

You can view 61 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.

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:
  • 16-Channel Mixing Desk (February 1990)
  • 16-Channel Mixing Desk (March 1990)
  • 16-Channel Mixing Desk, Pt.3 (April 1990)
  • 16-Channel Mixing Desk; Pt.4 (May 1990)
  • Modifications To The 16-Channel Mixer (November 1990)
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)
MARKET CENTRE Cash in your surplus gear. Advertise it here in Silicon Chip. CLASSIFIED ADVERTISING RATES 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 classified ad, print clearly on a separate sheet of paper & send it together with your cheque or credit card details to : Silicon Chip Classifieds, PO Box 139, Collaroy Beach, NSW 2097. Or fax the details to (02) 979 6503. If paying by credit card, fill in the details on the order form included elsewhere in this issue. IIT MATHS /:' "l.s,-e-, COPROCESSORS 2C-08 2C87-8MHz 2C-10 2C87-1 0MHz 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 ~J:-o ~{~ .S.s 476 528 618 645 130 890 915 1148 1380 - - FIVE YEAR WARRANTY CAD CONNECTION PHONE (02) 957 6719 ...... FAX (02) 954 5550 FOR SALE BEGINNER'S GUIDE To The IBM PC. Gives new users a flying start & saves money. $12 posted. Bruce Collins, 234 Tor St, Toowoomba, Old 4350. 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. *** "SATFAX" is a NOAA, Meteor & GMS weather satellite picture receiving program . Uses EGA & VGA modes, needs EGA or VGA col~ our 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, KIT REPAIRS Kits repaired from all magazines. PCs and peripherals also repaired. Ring anytime 9am-9pm EEM ELECTRONICS 10 Bouverie Place Epping, Vic. 3076 Phone (03) 401 1393 42 Villiers St, New Farm, 4005 Old. Phone (07) 358 2785. KITS AVAILABLE for the ETI Digi125 $17.95 plus $2.50 p&p. Heatsink not supplied. Kits built and repaired. Repairs to radio control equipment. Model railway projects designed and built. Prototype and production board supplier to the hobbyist. Supplier of PCBs for projects in SILICON CHIP. Electronic Toy Services (08) 382 8919. DIGITAL 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. BARGAIN OF a lifetime. Retiring hobbyist has for sale an enormous quatity of new components (20,000+) cataloged & in over 300 capstan drawers. 250 magazines, test equipment, UV light box, tools, wire, circuit diagrams, etc. Best offer. For details, phone John (065) 85 2150 BH, (065) 85 3321 AH or fax (065) 85 2331. XT/AT HANDBOOK by Choisser & Foster. Pocket size, 92 pages. For engineers & programmers, & other serious PC/XT & PC/AT users. A collection of hardware & software facts & 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 data on the PC compatible family & its operating system. Latest edition. This is the one advertised in the US mags Byte, Dr Jobbs Journal, etc. $20 including postage. 5 off $15 each. Don McKenzie, 29 Ellesmere Crescent, Tullamarine, 3043. 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 & NOVEMBER1990 119 C ..1 N Adroit Electronics ........... ... ...... 120 ►~ IC") ·oi 0 0 C: .c a. en u Q) f06 Ol C: "O Q) Arista .... .. ..... .... ............... 29,76,89 ll) (.) >< CU Z LL Back Issues ...... .. ......... ....... .. 96,97 Board Solutions ... ...... .... ..... .. 54,55 Q) ·~ ... I-,.... Cad Connection .. .. .... ... .. ... ...... 119 (.) -=:I' David Reid Electronics ....... . IFC,1 w Q) (/) ..I Bose Australia .. ... ................. 30,31 ll) wr::o::I' !: e. 0 ..c: a: c. 0 §, Cl.·Cl. (/) ::::, Altronics ........ .. ........ ..... ....... .. 61-65 -=:I' or.: a: ;; (/) ~ a: Advertising Index 1- (/) Q) Q) (/) 0 94,95 Dick Smith Electronics .. .......... 9-15 EEM Electronics ... .. ..... ... .. ..... 119 Electronic Solutions .............. 78,79 C ea: Electronics World .... .... .... .......... 73 Elmeasco ........... .. .... ............. 81,91 MEMORY EXPANSION SIMM & SIP 9 X 25.6. 9x 1MB 8 x 1MB(MAC) 9x4MB -120ns -100ns - 80ns - 70ns - 60ns -100ns - 80ns - 70ns - 80ns - 70ns - 80ns NIA 23.00 23.80 24.70 30.00 79.00 81 .50 89.50 76.50 82.00 528.00 -100ns - 80ns - 80ns - 80ns - 80ns 2.10 2.40 2.50 7.65 7.65 INTEL 8087-2 80287-10 80C287-12 387SX-16 387DX-16 387SX-20 387DX-20 3870X-25 3870X-33 175.00 308.00 390.00 435.00 478,00 490.00 538.00 680.00 835.00 387SX-16 3870X-20 3870X-33 400.00 490.00 750.00 CYRIX TOSHIBA LAPTOP T1000SE T1600 T3100E T3100SX T3200SX T3200 T5100 T5200 2MB 2MB 2MB 2MB 2MB 3MB 2MB 2MB 51 5.00 340.00 340.00 340.00 340.00 570.00 340.00 340.00 COMPAQ 386-20, 386-25, 386-20E, 386-S, 386-33 4MB MODULES 680.00 4MB BOArds 798 .00 PELHAM WEITEK 3167-20 3167-33 4167-25 4167-33 820.00 1010.00 1500.00 1780.00 30/286,50 70E61 ,121 70A21 2MB 2MB 2MB Harbuch Electronics .......... ...... 93 Hycal Instruments .. .......... .. .. .. 119 Jaycar Electronics .... 34-37,84-87 Jiloa ....... ... ..... .... .. ....... ..... ....... 120 J.V. Tuners .... .. ... ... ..... .. ..... ....... . 50 Oatley Electronics ......... ...... ..... 53 Pacific Microelectronics ............ 49 PC Marketplace ....... .. ...... .. ..... IBC IBM PS/2 DRAM/DIP 4164 41256 41464 4 X 256 1MB Geoff Wood Electronics ......... ... 5 Prices At Sept 13, 1990 CO-PROCESSORS 250.00 280.00 280 .00 Sales Tax 20%. Overnight Delivery. Credit Cards Welcome 1st Floor, 100 Yarrara Road, Pennant Hills, NSW 2120 Tel (02) 980 6988 Fax (02) 980 6991 Pelham ..... .. ..................... .... .. 120 RCS Radio.................... .. .......... 92 Resurrection Radio .................. 41 Rod Irving Electronics .... ...... 46,47 70,71, 108,109 Silicon Chip Binders ....... ..... OBC Silicon Chip Subscriptions 113, 114 TOROID POWER TRANSFORMERS 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. ACTIVE SHORTWAVE ANTENNA SILICON CHIP, JAN 1990. Complete kit $59.00, Built and Tested $119.00, Case $10.00. LOOP ANTENNA Improve signal strength & quality with this portable antenna. Kit $44.00, Built and Tested $69.00 COMPACT INDOOR FM ANTENNAS Two models to choose from, Terk FM2000 a passive loop FM antenna for $69.95 or the Terk PI2 powered FM antenna with wideband low noise filter for $199.00. We can also provide assembly facilities for small production runs at competitive prices JILOA (TECHNIKIT DIVISION) transistor types available for restoration. Repairs done on tape decks, amplifiers, TVs & videos. Open Sat. 10am-5pm; Sun. 12.30-5pm. 109 Cann St, Bass Hill, NSW 2197. Phone (02) 645 3173 BH or (02) 726 1613AH. WANTED 120 SILICON CHIP Tech-Fast ..... .. .. .... ........ ... .......... 21 Transformer Discounters ... ... .. 120 PC Boards Printed circuit boards for SILICON CHIP projects are made by: PO Box 73, Glenhuntly, VIC 3163. Telephone: (03) 571 6303 • Electronic Toy Services, 2/111 Glynville Drive, Hackham West, SA 5163. Phone (08) 382 8919. Phone (03) 789 5145. 50 Edward St, Langwarrin 3910. • Jemal Products, 5 Forge St, Welshpool, WA 6106. Phone (09) 350 5555. WANTED CIRCUIT: Pye power supply • Marday Services, PO Box 19-189, Avondale, Auckland, NZ. Phone 88 5730. PS775. $10 for lend of & return . Phone (067) 36 1078. WANTED: IC MBL8243M P/N ElWANTED VALVES: 1A7, 1H5, 105, 1P5. Pay $10 each. W. Kilpatrick. Sound Australia .... .......... .... ... ... 29 Tandy Electronics ........ ........ ... . 23 347766 for Akai VS-3 VCR (on Mechaeon PCB). Phone (049) 48 6087. • RCS Radio Pty Ltd, 651 Forest Rd , Bexley, NSW 2207. Phone (02) 587 3491 .