Silicon ChipMarket Centre - July 1991 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: There's an electric vehicle in your future
  4. Feature: How To Install Mutiple TV Outlets; Pt.2 by Jim Lawler
  5. Vintage Radio: Some simple repair techniques by John Hill
  6. Feature: Tuning In To Satellite TV; Pt.2 by Garry Cratt
  7. Project: Battery Discharge Pacer For Electric Vehicles by Dieter Kuenne
  8. Project: Error Analyser For CD Players, Pt.1 by Stephen McBride
  9. Serviceman's Log: Bits & pieces - odds & ends by The TV Serviceman
  10. Subscriptions
  11. Order Form
  12. Project: Loudspeaker Protector For Stereo Amplifiers by Bob Flynn
  13. Project: Four-Channel Lighting Desk, Pt.2 by John Clarke & Leo Simpson
  14. Back Issues
  15. Feature: Amateur Radio by Garry Cratt, VK2YBX
  16. Feature: Computer Bits by Jennifer Bonnitcha
  17. Feature: Remote Control by Bob Young
  18. Feature: The Story Of Electrical Energy; Pt.11 by Bryan Maher
  19. Market Centre
  20. Advertising Index
  21. Outer Back Cover

This is only a preview of the July 1991 issue of Silicon Chip.

You can view 46 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:
  • How To Install Multiple TV Outlets (May 1991)
  • How To Install Mutiple TV Outlets; Pt.2 (July 1991)
Articles in this series:
  • Tuning Into Satellite TV (June 1991)
  • Tuning In To Satellite TV; Pt.2 (July 1991)
  • Tuning In To Satellite TV; Pt.3 (August 1991)
Articles in this series:
  • Error Analyser For CD Players, Pt.1 (July 1991)
  • Error Analyser For CD Players, Pt.2 (August 1991)
  • Error Analyser For CD Players, Pt.3 (November 1991)
Items relevant to "Four-Channel Lighting Desk, Pt.2":
  • Silicon Chip article scan, June 1991 - 4-Channel Lighting Desk Pt.1 (AUD $10.00)
  • Silicon Chip article scan, July 1991 - 4-Channel Lighting Desk Pt.2 (AUD $10.00)
  • Silicon Chip article scan, July 1991 - 4-Channel Lighting Desk Pt.2 (AUD $10.00)
Articles in this series:
  • Four-Channel Lighting Desk, Pt.1 (June 1991)
  • Four-Channel Lighting Desk, Pt.2 (July 1991)
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:
  • 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:
  • 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)
MARKET CENTRE Cash in your surplus gear. Advertise it here in Silicon Chip. FOR SALE 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", "RF,2EGA" & "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 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, 4004 Old. Phone (07) 358 2785. LAB LASERS. 0.5mW to 2mW HeNe lasers complete. Ideal for students or hobbyists. Australian made. $440- $640. Phone M.C.E. Lasers (03) 357 0055. 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 & data on the PC compatible family & its operat- r-------------------------, 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 the lines below or on a separate sheet of paper & send the form 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. Enclosed is my cheque/money order for $_ _ _ _ or please debit my 0 Bankcard 0 Visa Card 0 Master Card XI I I Signature_ _ __ _ __ _ _ _ _ Card expiry date_ _~ /_ __ I I Name _ __ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ I I Street _ _ _ _ _ _ _ _ _ _ __ _ __ _ _ _ _ _ _ _ __ I I Suburb/town _ _ __ _ __ _ _ __ _ Postcode_ _ _ _ __ I L _________________________ J Card No. ing system. Latest edition. This is the one advertised by Annabooks in the US magazines Byte, Dr Dobb's Journal, etc. $20 including postage. Five or more $15 each. Don McKenzie, 29 Ellesmere Crescent, Tullamari_ne 3043. KIT REPAIRS. No job too small, fixed price & free quotes. Warranty on all repairs. Construction & design service also available. Phone (02) 649 2134. MAINS FILTER SPECIAL. Compact unit with an IEC socket, only about twice as long as a standard IEC socket. Not just a cheap filter that has a few capacitors. This unit includes two 1.7mH inductors & three capacitors in a shielded metal can. Has spade output connectors. Its 240V/3A rating means that it can supply up to 720 watt loads. With every filter, we will include a 140 joule varistor as a free bonus! That makes the pair about 1/3 the price that you would expect to pay! The price of this limited stock item? - only $9.90 for the mains filter & varistor. 10 or more: $8.90 each. Oatley Electronics, PO Box 89, Oatley, 2223. Phone (02) 579 4985. ULTRASONIC BURGLAR ALARM kit. SILiCON CHIP, May 1988. A quality crystal-locked ultrasonic movement detector that doubles as a self-standing alarm. Has provision for bonnet/boot protection, flashing light and back-up battery operation . PCB & on-board parts only $27.90 (includes open transducers). Optional light flasher/ back-up battery parts $7.50. Alternatively, we can supply prewired ultrasonic transducers with mounting clips for $12 extra. That's incredible. Oatley Electronics, PO Box 89, Oatley, 2223. Phone (02) 579 4985. MASTER SLAVE SWITCH. Remotely switch your non-remote TV off & on via your remote-controlled VCR. Includes a mains filter & over-voltage protection. Can also be used with hifi systems, computer systems, etc. One switch operation will switch everything on! Only $32.95 for the PCB & all on-board components or $54.95 for the com- JuLY 1991 103 r "' MEMORY EXPANSION Prices at May 10th 1991 DRAM DIP ZIP SIMM & SIP SPEED Cns) TYPE 4164 41256 120 2.20 1.80 100 2.35 2.00 2.50 6.10 80 70 2.20 2.40 2.75 411000 7.30 7.90 1MB x 4 (Static) 38.00 20.50 21.00 22.50 256K X 9 62.00 72.00 81.00 1MBx9 295.00 4MBx9 SimmSockets30 X 1Vertical 1.70 Simm Sockets 30 x 2 Angle 3.50 Simm Sockets 30 x 2 Vertical 3.20 41464 '"PELHAM Altronics .............. .................. 86-87 CO-PROCESSORS INTEL 120.00 175.00 175.00 272.00 275.00 285.00 285.00 550.00 693.00 848.00 432.00 510.00 8087 8087-1 8087-2 80287-8 80287-10 287XLT 287XL 387DX20 387DX25 387DX33 387SX16 387SX20 CYRIX IIT Antique Radio Restorations ..... 104 Av-Com ............ .......................... 20 Back Issues .. .... ..... .... .. ........ , 78,79 178.00 David Reid Electronics ......... IFC, 1 Dick Smith Electronics .......... 11-13 510.00 640.00 780.00 406.00 440.00 480.00 600.00 670.00 395.00 Sales Tax 20%. Overnight Delivery. Credit Cards Welcome 1st Floor, 100 Yarrara Road, Pennant Hills, N.S.W. 2120 Tel(02)980-6988 Advertising Index Fax(02)980-6991 ,.. Electronic Solutions ................... 23 Electronic Toy Services ........... 104 . Elmeasco ................. .............. .... 77 Geoff Wood Electronics ............. 83 Harbuch Electronics .................. 61 Hycal Instruments .................... 104 Jaycar Electronics ................ 49-56 MODEL TRAIN CONTROLLER project, SILICON CHIP, November 1990, $19.95 plus $2.50 p&p. Plugpack, 12VAC, 1. 7A, suitable for the above (use rectifier), $29.95 plus $4.00 p&p. Kits built & repaired. Prototype production board supplier to the hobbyist & supplier of SILICO~ CHIP project PCBs. ETS, PO BOX 491, NOARLUNGA CENTRE, SA 5168. Phone: (08) 382 8919 FIX-A-KIT $20.00 PER HOUR LABOUR 3 MONTHS WARRANTY ON REPAIRS 12 MONTHS WARRANTY ON CONSTRUCTION Service to most typ e s of electronic equipment TECHNICAL ASSISTANCE HYCAL ELECTRONICS Design, Manufacture & Re pair of Electronic Equipm e nt Trading Hours 8am to 3pm, Monday to Friday (02) 633 5477 J.V. Tuners ............... .................. 47 Newtronics ........ ... ....... ........... ... . 16 Oatley Electronics .... ... ..... .. .... 5,89 PC Computers .............. ........ ... 104 PC Marketplace .. .. ...... .... ........... 9 Pelham ................... .. .......... ..... 104 Philips Test & Measurement .. OBC Raytec Data Systems ................ 61 RCS Radio .... ............................ 48 MAX 1/0 Board Kit $149.00. Built & Tested $269.00. • 7 x Relays SPST 2 amps each • 8 x Switch inputs (TTL) • 1 x DAC (Digital to Analog converter) ' 1 x ADC ( Analog to Digital converter) • 4 x Motor Drive outputs (40mA ea.) • 1 x Programmable timer output. MAX includes a 20·page manual with all schematics, parts layout elc., a 360K PC·compatible floppy with diagnostic and sample software in GW·Basic. MAX runs from a PC compatible printer port for full compatibility with a large range of computers. Same day dispatch of orders. Credit cards or personal cheques welcome. Phone (08) 332 6513 or Fax (08) 364 0902 (24 hours) PC Computers, 36 Regent St, Kensington; SA. plete kit. You'd expect to pay that much just for a mains filter with overload protection! Oatley Electronics, PO Box 89, Oatley, 2223. Phone (02) 579 4985. TRANSFORMER REWINDS ALL TYPES OF TRANSFORMER REWINDS TRANSFORMER REWINDS Rod Irving Electronics ....... ... 34,35 42,43,96,97 Reply Paid No.2, PO Box 438, Singleton, NSW 2330. Ph: (065) 761291. Fax: (065) 761003. Silicon Chip Binders .. ........ ...... IBC Stewart Electronics .................... 17 SATELLITE DISHES FOR SALE These dishes are the same as shown in 'Silicon Chip' June 1991 on page 14. 1.8 meter Aluminium. 44.8dB gain at 12 GHz $200.00 plus freight. 2.4 metre Extender kit. Lifts the gain to 46.97dB $200.00 plus freight. Phone (077) 411247 9am - 9 □ m ANTIQUE RADIO ANTIQUE RADIO restorations. Your one-stop radio repair shop. Specialising in restoring vintage radios including chassis rewiring, re-condensing, quality new parts, valves, valve sockets, speakers, power & audio transformers. Secondhand radio dials & parts for most brands & models. About 400 radios in stock for sale, restoration & parts. Every 104 S rLICON CHIP Resurrection Radio ............ .. ...... 17 restored wireless is covered by a 2year warranty on parts & labour. We restore damaged woodwork & cabinets & French polish (approx. 40 coats). Vintage car radios available for sale or restoration. Repairs done on tape decks & amplifiers. Open Sat. 1Oam-5pm; Sun. 12.30-5pm. 109 Cann St, Bass Hill, NSW 2197. Phone (02) 645 3173 BHor(02)7261613AH. SC Subscriptions ........................ 57,58 Telecom ..................................... 67 Transformer Rewinds .. ....... ..... 104 Videosat .......... ........................... 21 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. • RCS Radio Pty Ltd, 651 Forest Rd, Bexley, NSW 2207. Phone (02) 587 3491.