Silicon ChipMarket Centre - August 1991 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Expanding career opportunities in electronics
  4. Feature: Tuning In To Satellite TV; Pt.3 by Garry Cratt
  5. Feature: A Step-By-Step Approach To Vintage Radio Repairs by Ressurection Radio
  6. Project: Build A Digital Tachometer by Darren Yates
  7. Project: Masthead Amplifier For TV & FM by John Clarke & Greg Swain
  8. Feature: Remote Control by Bob Young
  9. Project: PC Voice Recorder by Darren Yates
  10. Feature: Computer Bits by Jennifer Bonnitcha
  11. Serviceman's Log: The case of blowing fuses by The TV Serviceman
  12. Project: Error Analyser For CD Players, Pt.2 by Stephen McBride
  13. Feature: The Story Of Electrical Energy; Pt.12 by Bryan Maher
  14. Order Form
  15. Vintage Radio: Getting out of trouble again by John Hill
  16. Back Issues
  17. Feature: Amateur Radio by Garry Cratt, VK2YBX
  18. Market Centre
  19. Advertising Index
  20. Outer Back Cover

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

You can view 41 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:
  • 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:
  • 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:
  • 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:
  • 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)
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:
  • 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)
MARKET CENTRE Cash in your surplus gear. Advertise it here in Silicon Chip. hobbyists. Australian made. $440- $640. Phone M.C.E. Lasers (03) 357 0055. 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", "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 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 IBM FORMAT 3.5-INCH 720K Review/ Info Disk on the video cassette size MS-DOS Atari Portfolio Pocket PC. Thinking of buying one? This will help you make up your mind. You already own one! It contains Public Domain software for the Portfolio, discounted accessory listings and much more . Just $5 or send a 43c stamp for more info to Don McKenzie, 29 Ellesmere Crescent, Tullamarine 3043 . KIT REPAIRS. No job too small, fixed price & free quotes. Warranty on all repairs. Construction & design service also available. Phone (02) 649 2134. IRREVERSIBLE TEMPERATURE sensitive labels for quick economic measuring , proving, documenting & indicating of temperature for components, motors, inaccessible or rotating parts & r-------------------------7 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 it clearly on a separate sheet of paper & send it with this form & 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 O Bankcard □ Visa Card O Master Card Card No. Signature_ _ _ _ __ _ __ __ Card expiry date_ _ ~/_ __ Name _ __ _ __ _ _ _ _ _ __ _ __ _ _ __ _ _ __ Street _ _ _ _ _ _ _ _ _ _ _ __ _ __ __ _ _ __ __ Suburb/town _ __ _ _ _ _ _ _ __ Postcode _ _ __ __ XI I I I I I I I I I L-------------------------~ vibrating surfaces. 40°C to 260°C in 41 steps. Send $10 for samples to Peter Crowcroft, GPO Box 904, Hong Kong. LIQUIDATION SALE. Manufacturer's stock. EPROMs, ICs, connectors , displays, transistors, transformers , capacitors , audio & computer components. Saturday August 10th at the Activity Club, 49 McElhone St, Woolloomooloo . Mail order available. Write for catalog. Phone (02) 955 3375. ULTRASONIC BURGLAR Alarm Kit. See S.C. May 1988. Crystal locked. Can be used as a detector or as a selfstanding alarm. Provision for bonnet/ · boot protection , flashing light & backup battery. Easily combined with our UHF remote control. Save 100s of dollars on equivalent commercial alarms. Clearance priced at only $29.90 for the PCB and all parts, except the screw terminals. A pair of ultrasonic transducers is included! Don 't miss out. P&P for any one or more kits listed: $5. Oatley Electronics, PO Box 89, Oatley, 2223. Phone (02) 579 4985. SINGLE CHANNEL UHF Remote Control. EA Jan.89 & April 89. Use it to switch car alarms, central locking , activate door openers, etc. Up to 50-metre range . Has separate switch & indicator relays. More than 19,000 code combinations . Features a compact transmitter. Only $49.95 for a complete transmitter kit & the receiver PCB and all on-board components. Extra transmitters are priced at $17 each. P&P for any one or more kits listed : $5 . Oatley Electronics , PO Box 89, Oatley, 2223. Phone (02) 579 4985. LOW-COST PIR Movement Detector Alarm. EA, May 1989. Now supplied with commercial case . Reliable unit that features a dual element pyroelectric sensor. Optional interface kit enables uses such as self-standing alarms, automatic light control , shop entry detector, etc. Over 10 metres range. Don 't miss out at the clearance price of only $29.90 for the PCB & the PIR detector components kit. Interface comA l'C l 'ST "/99 J 95 r- "I MEMORY EXPANSION Advertising Index Prices at May 10th 1991 DRAM DIP ZIP SIMM & SIP SPEED (ns) TYPE 120 2.20 1.80 100 2.35 2.00 2.50 6.10 80 70 4164 2.20 2.40 41256 2.75 41464 7.30 7.90 411000 1MBx4 (Static) 38.00 20.50 21.00 22.50 256K X 9 1MB x9 62.00 72.00 81.00 295.00 4MB x 9 SimmSockets30 X 1Vertical 1.70 Simm Sockets 30 x 2 Angle 3.50 Simm Sockets 30 x 2 Vertical 3.20 '"PELHAM CO-PROCESSORS INTEL CYRIX 8087 8087-1 8087-2 80287-8 80287-10 287XLT 287XL 387DX20 387DX25 387DX33 387SX16 387SX20 120.00 175.00 175.00 272.00 275.00 285.00 285.00 550.00 693.00 848.00 432.00 510.00 Altronics ................................ 29-32 Antique Radio Restorations ....... 96 IIT Av-Comm ................ ................... 15 Back Issues ................ ........ .. 86,87 David Reid Electronics ... ...... IFC,1 178.00 510.00 640.00 780.00 406.00 440.00 Dick Smith Electronics .......... 10-12 Electronic Solutions .... ............. .. 23 480.00 600.00 670.00 395.00 Electronic Toy Services .... ... ...... 96 Electronics World ........ ....... ........ 91 Elmeasco ........................ ....... OBC Sales Tax 20%. Overnight Delivery. Credit Cards Welcome 1st Floor, 100 Yarrara Road, Pennant Hills, N.S.W. 2120 Tel(02)980-6988 Fax(02)980-6991 ~ Geoff Wood Electronics ............. 65 Harbuch Electronics .................. 54 Hycal Instruments .... ...... .... ...... .. 96 Jaycar Electronics ...... .......... 45-52 PRINTED CIRCUIT BOARDS PCBs for al l SILICON CHIP projects made to order. Prototype & kit repair service available. Hours 10-5 Wednesday to Friday, 9-12 Saturday. FIX-A-KIT $20.00 PER HOUR LABOUR • 7 x Relays SPST 2 amps each • 8 x Switch inputs (TTL) • 1 x DAG (Digital to Analog converter) • 1 x ADC ( Analog to Digital converter) ' 4 x Moto r Drive outputs (40mA ea.) • 1 x Programmable timer output. MAX includes a 20•page manual with all schematics, parts layout etc. , 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.· ponents kit $9.00. P&P for any one or more kits listed: $5. Oatley Electronics, PO Box 89, Oatley, 2223. Phone (02) 579 4985. IBM COMPATIBLE computer kits & accessories. Button spike protector $37 .00. 6-socket power boards with surge/spike protection $49 .00. Pack/ post $3 .00. Send for a free price list. M.T.S. Electronics, PO Box 1013 Ta~ee , NSW 2430. Phone (065) 53 1296. BUSINESS CARDS. Small quantities for home business . 30 colours. Prices from $30 for 100 cards including p&p. 96 SILICO N CHIP Kalextronics ............ .... ...... ... ...... 13 3 MONTHS WARRANTY ON REPAIRS 12 MONTHS WARRANTY ON CONSTRUCTION Newtronics ................. ........ ..... .. . 57 Service to most types of electronic equipment Oatley Electronics ........... 77,94,96 TECHNICAL ASSISTANCE HYCAL ELECTRONICS Design, Manufacture & Repair of Electronic Equipment Trading Hours 8am .to 3pm. Monday to Friday ETS, PO BOX 491, NOARLUNGA CENTRE, SA 5168. Phone: (08) 382 8919 MAX 1/0 Board Kit $149.00. Built & Tested $269.00. J.V. Tuners ................................. 62 (02) 633 5477 PC Computers ...... .... .. ........ ....... 96 PC Marketplace ......................... 73 Pelham ....... ........................ ....... 96 RCS Radio .... ... ... ...................... 85 Resurrection Radio ..... .. ..... ........ 85 Rod Irving Electronics ...... .... 58 ,59 TRANSFORMER REWINDS ALL TYPES OF TRANSFORMER REWINDS TRANSFORMER REWINDS Reply Paid No.2, PO Box 438, Singleton, NSW 2330. Ph: (065) 76 1291. Fax: (065) 76 1003. Townsville Goldprint, 92 Tippett St, Gulliver, Old 4812 . Phone (077) 25 2037. UNUSUAL BOOKS. Fireworks , locksmithing, radar invisibility, surveillance, unusual chemistry & more. Send SASE for catalog to Vector Press , Dept S, PO Box 434, Brighton SA 5048. 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 40G radios in stock for sale, restoration & parts. Every restored wireless is covered by a 2year warranty on parts & labour. We restore damaged woodwork & cabinets & French polish (approx. 40 coats). Vin- Silicon Chip Binders ................ IBC Stewart Electronics .................... 85 Subscriptions ............................. 81 Transformer Rewinds ....... ...... .. . 96 Videosat ........................ .. .,., ......... 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. • RCS Radio Pty Ltd , 651 Forest Rd , Bexley, NSW 2207 . Phone (02) 587 3491. tage car radios available for sale or restoration . Repairs done on tape decks & amplifiers . Open Sat. 1 Oam-5pm; Sun . 12.30-5pm. 109 Cann St , Bass Hill , NSW 2197. Phone (02) 645 3173 BH or (02) 7261613AH. SC