Silicon ChipMarket Centre - February 1990 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: On taking risks and picking winners
  4. Vintage Radio: Safety with vintage radios by John Hill
  5. Feature: Bose Noise Cancelling Headphones by Leo Simpson
  6. Feature: Remote Control by Bob Young
  7. Project: 16-Channel Mixing Desk by John Clarke & Leo Simpson
  8. Project: A High Quality Audio Oscillator, Pt.2 by Leo Simpson
  9. Serviceman's Log: Another song about Sam by The TV Serviceman
  10. Project: The Incredible Hot Canaries by John Clarke
  11. Project: Phone Patch For Radio Amateurs, Pt.2 by John Clarke & Greg Swain
  12. Feature: Computer Bits by Steve Rayor
  13. Project: Amateur Radio by Garry Cratt, VK2YBX
  14. Feature: PC Program For Great Circle Bearings by Phillip Watson, VK2ZPW
  15. Back Issues
  16. Feature: The Evolution of Electric Railways by Bryan Maher
  17. Market Centre
  18. Advertising Index
  19. Subscriptions
  20. Outer Back Cover

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

You can view 51 of the 104 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:
  • 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)
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:
  • A High Quality Audio Oscillator (January 1990)
  • A High Quality Audio Oscillator, Pt.2 (February 1990)
Articles in this series:
  • Phone Patch For Radio Amateurs, Pt.1 (January 1990)
  • Phone Patch For Radio Amateurs, Pt.2 (February 1990)
Articles in this series:
  • Computer Bits (February 1990)
  • Computer Bits (March 1990)
  • Waveform Generation Using A PC, Pt.3 (May 1990)
  • Waveform Generation Using A PC, Pt.4 (July 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:
  • 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)
CENl 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 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) 21 ($9.40) 22 ($9.80) 23 ($10.20) 24 ($10.60) 25 ($11.00) 26 ($11.40) 27 ($11.80) 28 ($12.20) 29 ($12.60) 30 ($13.00) MEMORY CHIPS PRICES FEBRUARY 1990 Chip type Speed 120ns 100ns BOns PTlces (excluding tax) 38.00 42.00 50.00 SIMMS 9 x 256 or SIPPS 9 x 1Mb LP 156.00 168.00 9x1MbHPIBM 185.00 9 x 1MB LP IBM 210.00 250.00 8x1MbLP 149.00 160.00 DIP 411000 (1 Mb) 15.00 15.80 414256 (1 Mb) 16.00 17.00 3.70 4.25 4.90 41256 41464 (256) 4.60 5.00 4164 2.50 2.80 ZIP 41256 4.00 5.00 411000 (1Mb) 18.00 20.00 Sales tax 20'/4 Overnight deHvery Credit cards welcome DISCOUNTS FOR DEALERS Name ... ..... .. ... .... ...... .......... , ....... ...... ........... ..... . ... ,., ...................... ...... ................. Street ... ..................... ........... .......... ...... .., ................ , ................. ............... ....... .. Suburb/Town .................. .. ........ ........ ... .... ...... .., ....... ..... .. ... Postcode ................ . Enclosed is my cneque or money order for$ .. .... ..... ... .. .. ........ ........... or please debit my Bankcard O Visa Card O MasterCard 0 Card No --'-- - - ' - L - - - ' - ~ ~--'-- - - ' - L - - - ' - ~ ~ _ _ . . ~ - ~ '--1 Signature ....... ....... ......... ..... ......... ...... ..... .. ............ Card expiry date ....... .I.. .... . .I .... .·~ FOR SALE SATFAX: WEATHER SATELLITE picture receiving program for IBM XT/AT. Displays in 64 colours. Needs EGA colour monitor & card, AM demodulator & ADC interface. $45 plus $3 postage. RADFAX2: HF WEATHER FAX, Morse & RTTY receiving program for IBM XT/AT. Needs CGA, SSB HF, FSK/tone decoder. Also "RF2HERC" & "RF2EGA", same as RADFAX2 but suitable for Hercules & EGA cards respectively. $35 plus $3 postage. All programs are on 5.25-inch 36OK floppy disc & include full documentation. Only from M. Delahunty, 42 Villiers St, New Farm, Qld 4005. Phone (07) 358 2785. BUILD YOUR OWN LED Moving Message Board. This 16-character $1 50 short form kit was featured in FIX-A-KIT $15 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 PELHAM Tel (02) 427 0011 Fax (02) 428 5460 FUJITSU MEMORY DRAM DIP 256K x 1 1OOns. . . $3.95 DIP 256K x 4 BOns ....... $16.00 ZIP 256K x 4 BOns . . . $16.50 DIP 1 MB x 1 BOns... . . $15.00 ZIP 1 MB x 1 BOns.. . .. $15.50 SRAM DIP BK x 8 100ns ....... $ 4.50 DIP 32K x 8 1OOns. . . . . $12.00 DRAM CONTROLLER MB1430/1 P..... $15.50 PACIFIC MICROELECTRONICS PHONE (02) 481 0065 FAX (02) 484 4460 Add Sales Tax 20% SILICON CHIP from March to June 1989. Can now be built as a three colour display using red and green LEDs. Kit consists of PC boards,. EPROM and full instructions to complete the project to a professional standard. Loaded from Centronics printer port or PC/XT keyboard. For more information, send a 41 c stamp to Don McKenzie, 29 Ellesmere Crescent, Tullamarine 3043. PCB ETCHING TANKS. Upright style, glass. Suit PCBs to 125 x 150mm $29.95 kit, $39.95 assembled. P&P $6.00. Other sizes on request. 5V 5OOmA plugpacks $9.95, P&P $2.50. continued next page FEBRUARY1990 103 rk---------------------, ~ BINDERS & SUBSCRIPTION COUPON To: Freepost 25, Silicon Chip Publications, PO Box 139 Collaroy Beach, NSW 2097, Australia. NO POST AGE STAMP REQUIRED IN AUSTRALIA. Start in, _ _ _ _ _ _ __ □ Renewal □ New subscription □ Please send me _ ___ SILICON CHIP binder(s) at $A 11 .95 plus $A3 p&p each (NZ p&p $A6). Name _ _ _ _ _ _ _ __ __ _ _ _ _ _ _ _ _ _ _ __ (PLEASE PRINT) Street._ _ _ _ __ _ _ _ _ __ _ _ _ _ _ _ _ _ _ __ Suburb/town _ _ __ _ _ _ _ _ ___ Postcode. _ _ _ _ __ 1 year ( 12 issues) 2 years (24 issues) Australia □ $A42 □ $A84 NZ & PNG (airmail) □ $A65 □ $A130 Overseas surface mail □ $A62 □ $A130 Overseas airmail □ $A 120 □ $A240 Enclosed is my cheque/money order tor $ _ _ _ _ or please debit my □ Bankcard □ Visa Card □ MasterCard Advertising Index Allied Capacitors . . . . . . . 77 Altronics . . . . . . . . . . . 40-43 Arista . . . . . . . . ..... 17 Board Solutions . . 1 2, 1 3 Dauner Electronics ....... 39 David Reid Electronics . . . . . 6 7 Dick Smith Electronics . . 54-59 Electronic Solutions . . 7 2, 7 3 Elmeasco . . . . . IFC Energy Control .. ... .. . .. 89 Force Electronics .. 65 Geoff Wood Electronics ... : 87 Harbuch Electronics 49 Hycal Instruments . . . . 1 03 Jaycar Electronics 28-31 80-83 Jiloa Pty Ltd . . . 39 J.V. Tuners . . . . . . . . 49 Lawson Radio . . . . . . . . 9 Novocastrian Electronics . . . 25 Oatley Electronics . . . . . 71 Pacific Microelectronics 89, 103 PC Marketplace . . ...... 4,5 Pelham 103 ACS Radio . . .. 39. Resurrection Radio .... 9 Rod Irving Electronics 92,93 Silicon Chip Binders ..... OBC Signature _ _ ______ _ _ _ __ Card expiry date _ _,__ _ L-----------------------J Kit repair and build service $1 5 per hour or set rate. Phone (08) 382 8919. Electronic Toy Services, 2/111 Glynville Drive, Hackham West, SA 5163. HIGH MILEAGE SUPER-CARB. Bolt on breakthrough. The EMPR0-70 is here. Free Details. Write today: E.P.M. Power Systems, PO Box 255SC, Ivanhoe 3079. NEW SERVICE - PARTS location and supply. Want just that part of a kit or just a hard to find part? We will find and supply them tor you. No search tees. Send SSAE with requirements to Part Search, PO Box 491, Noarlunga Centre, SA 5168. Phone (08) 382 8919. TUNING IN - announcing a new concept in news bulletins. Join our dynamic team of over-unity researchers by subscribing today. News, views, feedback & linkup. All the latest on the tree energy scene. Only $25.00 for 12 issues - $3.00 for sample copy. Write today. Free Energy Connection, PO Box 255SC, Ivanhoe, 3079. ACTIVE TRANSMISSION line stereo speakers. Includes preamp. $760.00. Send SAE to 36 Palmer St, Nambucca Heads, NSW 2448. PROJECT PCBs. Talk to the outside world. ETl-1643 PC 1/0 card, PC 16ADC 1 6-channel 8 bit. Both $39 .95 each. Rear bracket & DB25 cable $16. 6502, 6809, Z-80 miniprocessor with 2 x PIA, RAM, ROM, expansion bus $49.95. Intel 8039/48/49 with wire wrap area B&T $199. Digi-125 125W power amplifier PCB $4.95. P&P $2.00. PC Computers, 36 Regent St, Kensington, SA 5068 . 104 SILICON CHIP RESISTORS, 1 % METAL film, 0.6 watt. Finest German quality, 7c each, $6 per hundred, any mixed values. SAE for tree sample & data sheet. Also BUX80 $7, 2N3055 $2.35, BC547 12c, 2N3019 $1.20, HEF4050B 80c, 1OnF greencap 20c, 1 OOnF monolithic 15c, 220nF 630 volt polycarbonate $2. P&P NSW $2 .50, interstate $3.50. Extended Pulse Burn Electronic Ignition: full kit $70, fully built and tested $99 postpaid. Chipspeed Electronics, PO Box 337, Wentworthville, NSW 2145. PC Boards Printed circuit boards tor SILICON CHIP projects are made by: • ACS Radio Pty Ltd, 651 Forest Rd , Bexley, NSW 2207 . Phone (02) 587 3491 . • Jemal Products, 5 Forge St, Welshpool, WA 6106 . Phone (09) 350 5555. • Marday Services, PO Box 19-189, Avondale, Auckland, NZ. Phone 88 5730. • Electronic Toy Services, 2/111 Glynville Drive, Hackham West, SA 5163 . LEADER 100MHz OSCILLOSCOPE. Quad trace, delay timebase LB0-518. As new, never used. $3,500 ono. Leader dot/crosshatch generator, high voltage probe, degaussing wand, $3,800 the lot ono. Andre Berger, 116 Norfolk Rd, North Epping 2121 . Phone (02) 868 4326. WANTED SERVICE MANUAL tor UPM98 . Phone (079) 27 6641 or send to Bannister Avionics, 16 Charlotte St, Rockhampton , Qld 4700.