Silicon ChipMarket Centre - June 1994 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Most security lighting is a waste of electricity
  4. Feature: News: Nissan's Future Electric Vehicle by Julian Edgar
  5. Feature: Electronic Engine Management; Pt.9 by Julian Edgar
  6. Feature: Moving Map Display For Helicopters by Silicon Chip
  7. Project: 200W/350W Mosfet Amplifier Module by Anthony Holton
  8. Project: A Coolant Level Alarm For Your Car by John Clarke & Leo Simpson
  9. Project: An 80-Metre AM/CW Transmitter For Amateurs by Darren Yates
  10. Project: The Stoney Broke Loudspeaker System by Leo Simpson
  11. Serviceman's Log: Around the world for sixpence by The TV Serviceman
  12. Order Form
  13. Project: Convert Your Phono Inputs To Line Inputs by Leo Simpson
  14. Project: A PC-Based Nicad Battery Monitor by Darren Yates
  15. Feature: Computer Bits by Darren Yates
  16. Review: Visual BASIC 3.0 - The New Standard? by Darren Yates
  17. Feature: Remote Control by Bob Young
  18. Vintage Radio: Timber cabinets, antique dealers & vintage radio prices by John Hill
  19. Feature: Amateur Radio by Garry Cratt, VK2YBX
  20. Back Issues
  21. Product Showcase
  22. Notes & Errata: Remote Control Extender for VCRs, April 1994; Induction Balance Metal Locator, May 1994; Champ Audio Amplifier, February 1994
  23. Market Centre
  24. Advertising Index
  25. Outer Back Cover

This is only a preview of the June 1994 issue of Silicon Chip.

You can view 35 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:
  • Electronic Engine Management; Pt.1 (October 1993)
  • Electronic Engine Management; Pt.2 (November 1993)
  • Electronic Engine Management; Pt.3 (December 1993)
  • Electronic Engine Management; Pt.4 (January 1994)
  • Electronic Engine Management; Pt.5 (February 1994)
  • Electronic Engine Management; Pt.6 (March 1994)
  • Electronic Engine Management; Pt.7 (April 1994)
  • Electronic Engine Management; Pt.8 (May 1994)
  • Electronic Engine Management; Pt.9 (June 1994)
  • Electronic Engine Management; Pt.10 (July 1994)
  • Electronic Engine Management; Pt.11 (August 1994)
  • Electronic Engine Management; Pt.12 (September 1994)
  • Electronic Engine Management; Pt.13 (October 1994)
Items relevant to "A Coolant Level Alarm For Your Car":
  • Silicon Chip article scan, June 1994 - Coolant Level Alarm (AUD $10.00)
  • Car Coolant Level Alarm PCB pattern (PDF download) [05305941] (Free)
Items relevant to "An 80-Metre AM/CW Transmitter For Amateurs":
  • 80m AM/CW Amateur Transmitter PCB pattern (PDF download) [06106941] (Free)
Items relevant to "Convert Your Phono Inputs To Line Inputs":
  • Silicon Chip article scan, June 1994 - Inverse RIAA Filter (AUD $10.00)
  • Inverse RIAA Filter PCB pattern (PDF download) [01105941] (Free)
Items relevant to "A PC-Based Nicad Battery Monitor":
  • DOS software for the PC-Based Nicad Battery Monitor (Free)
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:
  • 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. FOR SALE THE HOMEBUILT DYNAMO: (plans) brushless, 1000 DC watt at 740 revs. $A85 postpaid airmail from Al Forbes, PO Box 3919 - SC, Auckland, NZ. Phone Auckland (09) 818 8967 any time. Rotor magnets (3700 gauss) kit now available. FLUORESCENT INVERTER KIT (SC Feb 91) 12V or 24V/5W-21W.48V ver­sion on request. Secondary wind, board plus components $30.00 plus P&P $4.00. Fluorescent inverter kit (SC Nov 93) 12V/24V/48V, 18W and 38W P.O.A. Solar battery charging regulator short form kit 12V or 24V (series) (SC Jan 94) employs Mosfet to switch solar array max current 10A $54.00 plus p&p $4.00. Additional Mosfet $8.00 and Schottky diode $5.00 to make 20A regulator. Cheques and postal money orders accepted with mail orders. Send orders to Otakar Priboj, PO Box 362, CLASSIFIED ADVERTISING RATES Advertising rates for this page: Classified ads: $10.00 for up to 12 words plus 50 cents for each additional word. Display ads (casual rate): $25 per column centimetre (Max. 10cm). Closing date: five weeks prior to month of sale. To run your classified ad, print it clearly in the space below or on a separate sheet of paper, fill out the form & send it with your cheque or credit card details to: Silicon Chip Classifieds, PO Box 139, Collaroy, NSW 2097. Or fax the details to (02) 979 6503. _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ Villawood, NSW 2163, Austra­lia. Phone (02) 724 3801. SOUTHERN CROSS SBC, accessories & EPROM emulator. See SC 8/93 & 12/93. Ideal for TAFE, schools & individual use. Alpine Technolo­gies, tel/fax (03) 751 1989. NETWORK YOUR PCs with “Little Big LAN”. Share disk drives and files (multi-user record locking), CD-ROMs and printers (with spooling). Connect PCs via serial or parallel ports, Arcnet and/or Ethernet cards. Supports up to 250 computers per network for only $95 ($100 for 3.5") for a whole network. Add $3 for postage in Australia. Works with MS-DOS, DR-DOS and Windows. For more information, write to GRAN­ TRONICS, PO Box 275, Wentworth­ville 2145. Phone A/H (02) 631 1236. A TRUE AUSSIE Z80 Development System driven from MS-DOS LPT1: EPROM is emulated during development. PCB and disk full of Source Code, Z8T XASM, Z8TBasic, and full circuits. $38. With EPROM $52. Promo disk $2. Don McKenzie, 29 Ellesmere Crescent, Tullamarine, Vic 3043. Phone (03) 338 6286. WEATHER FAX programs for IBM XT/ ATs *** “RADFAX2” $35 is a high resolution, shortwave weather fax, Morse & Rtty receiving program. Suitable for CGA, EGA, VGA and Hercules cards. Needs SSB HF radio & Radfax decoder. Enclosed is my cheque/money order for $­__________ or please debit my RCS RADIO PTY LTD Card No. ✂ ❏ Bankcard   ❏ Visa Card   ❏ Master Card Signature­­­­­­­­­­­­__________________________ Card expiry date______/______ Name ______________________________________________________ Street ______________________________________________________ Suburb/town ___________________________ Postcode______________ 94  Silicon Chip RCS Radio Pty Ltd is the only company that manufactures and sells every PC board and front panel published in SILICON CHIP, ETI and EA. RCS Radio Pty Ltd, 651 Forest Rd, Bexley 2207. Phone (02) 587 3491 Radio and Electrical Books 1914 Catalog Electro Importing Co ............$18 1936 Radio Data Book ...............................$15 Hammarlund Short Wave Manual (1937)....$11 Henley’s 222 Radio Circuit Designs ......$26.50 Neon Signs (1935) ................................$28.50 How to Become a Radio Amateur (1930) .....$7 How to Build & Operate Short Wave Receivers ...................................................$18 How to Build a Solar Cell ...........................$11 High Frequency Apparatus (1916) .............$29 Radio for Beginners ................................$6.50 Radio for the Millions .................................$20 Short Wave Radio Manual (1934) ..............$30 Television (1938) .........................................$7 Tesla Coil ....................................................$11 Tesla Coil Secrets .......................................$16 Tesla Said ...................................................$79 Construction of Large Induction Coils ........$23 The Wimshurst Machine How to Make .$19.50 The Wireless Man ......................................$27 Wireless Experimenter’s Manual 1920 .......$31 Electrical Goods & Radio Apparatus ..........$14 Electroplating (1911) ............................$17.75 Experimental Television How to Make ........$34 Meissner “How to Build” Instructions ........$22 How & Why of Radio Apparatus ...........$20.50 All prices include postage. Payment can be made by cheque or money order made out to Plough Book Sales, PO Box 14, Belmont, Vic. 3216. Phone (052) 66 1262. Silicon Supply and Manufacturing 4002B 4010B 4011B 4012B 4013B 4014B 40150 4017B 4019B 4023B 4025B 4027B 4040B 4048B 4050B 4053B 4060B 4069B 4070B 4071B 4075B 4082B 4094B 74HC11 74HC27 .86 .70 .86 .77 .82 1.53 1.55 1.88 .82 .67 .67 .67 2.13 1.15 .77 1.39 1.71 .69 .69 .69 .69 .69 1.31 .55 .50 74HC30 74HC76 74HC86 74LS11 74LS12 74LS13 74LS14 74LS20 74LS21 74LS27 74LS30 74LS33 74LS49 74LS73 74LS74 74LS83 74LS85 74LS90 74LS92 74LS109 74LS126 74LS138 74LS139 74LS147 74LS148 .50 .65 .55 .60 .60 1.00 .65 .65 .50 .50 .50 .60 2.85 1.35 .55 .90 .75 1.10 1.45 1.10 .60 .75 .75 2.85 1.25 74LS151 74HC138 74HC139 74HC154 74HC174 74HC373 74F00 74F02 74F08 74F10 74F11 74F20 74F30 74F32 74F36 74F38 74F151 74F163 74F169 74F175 74F241 74F244 74F257 74F258 74F353 .60 1.05 .60 3.80 .80 1.25 .50 .50 .50 .50 .50 .50 .50 .50 1.10 .80 .65 .85 2.30 .80 1.15 1.10 .75 2.15 1.75 All prices include sales tax. Phone (02) 554 3114; Fax (02) 554 9374. After hours only bulletin board on (02) 554 3114 (Ringback). Let the modem ring twice, hang-up, redial the BBS number, modem answers on second call. PO Box 92, Bexley North, NSW 2207. TRANSFORMER REWINDS ALL TYPES OF TRANSFORMER REWINDS *** “SATFAX” $45 is a NOAA, Meteor & GMS weather satellite picture receiving program. Needs EGA or VGA plus “WEATHER FAX” PC card. *** “MAXISAT” $75 is similar to SATFAX but needs 2Mb expanded memory (EMS 3.6 or 4.0) and 1024 x 768 SVGA card. All programs are on 5.25-inch or 3.5-inch disks (state which) & include documentation. Add $3 postage. Only from M. Delahunty, 42 Villiers St, New Farm, Qld 4005. Phone (07) 358 2785. REAL TIME ICE!!! The only way to go. MOTOROLA 6805 EMULATOR and programmers. Prices and data from Graham Blowes, Mantis Micro Products, 38 Garnet Street, Niddrie 3042. Phone (03) 337 1917 (a/h), (03) 575 3349 (b/h). Fax (03) 575 3369. BINARY CLOCK - OCTOBER 1993: complete documentation supplied, includes introduction to binary, how it works, PLD source list­ings, conversion tables. Kit with PCB and all components $75 + $5 p&p. Optional Z frame stand (includes spacers and chassis DC connector) $25 + $5 p&p. Prototype Electronics, 1/29 Stewart St, Parra­ matta, NSW 2124. Phone (02) 683 3510; Fax TRANSFORMER REWINDS Reply Paid No.7, PO Box 1058, St Marys, NSW 2760. Ph: (02) 833 1146. Fax: (02) 623 5559. SECONTRONICS COMPONENTS, COMPUTERS, ELECTRON TUBES S/H TEST EQUIPMENT, COMPUTER REPAIRS PC COMPATIBLE KEYBOARDS 101 AT:$39 I/O + IDE/FDD $35 RECYCLED EPROMS AT I/O CARDS $22 2716 $1.50 2SD1169 $2.00 2732 $1.50 2N3440 $0.80 2764 $2.00 2N3439 $0.80 27128 $3.00 2SC3157 $4.00 27256 $3.50 27C41 $0.80 27512 $3.50 7406 $0.20 27C101 $4.00 8250 $5     8251 $2 8259 $2    6809 $8 MC8050 $2 MCT275 $1.20 MOC3032  $2 VALVES: QQV07/50 $25 3D21   $8 12AU7   $6 6SG7   $8 6U8A   $8 1S2   $3 1T4   $6 CV553   $3 2C39A $30 2C40A $40 3A4   $8 5651   $6 5651A   $6 6AK5   $6 6J6WA  $7 6AM6  $5 6BA6  $4 SPECIAL: SURFACE MOUNT COMPONENT PACK – 180 RESISTORS, 40 ZENERS, 30 TRANSISTORS AND 2 ICs. $6.50 INC. PACK & POST PHONE OR MAIL ORDERS, CREDIT CARDS ACCEPTED FOR ORDERS $20 & OVER, DISCOUNTS FOR QUANTITY ORDERS. NOW AT SHOP 5, 79 RICKSTON ST, MANLEY WEST, QLD. 4179. OPEN TUES - FRID 9.30AM - 5PM, SAT. 9AM - 2PM. MAIL ORDERS TO PO BOX 34 CANNON HILL QLD. 4170. PHONE (07) 396 1859, FAX (07) 855 1014. MEMORY PRICES PRICES AT APRIL 8TH, 1994 SIMM 1Mb x 3 1Mb x 9 4Mb x 9 4Mb (72-pin) 8Mb (72-pin) 16Mb (72-pin) 70ns 70ns 70ns 70ns 70ns 70ns $63 $65 $256 $250 $520 $985 DRAM DIP 1 x 1Mb 256 x 4 70ns 70ns $8.50 $9.00 IBM PS.2 55/65SXVP L40/N33 90/95 PS1 4Mb 4Mb 4Mb $250 $300 $265 MAC 4Mb 4Mb x 80 80ns 6Mb P’BOOK $220 $380 CO-PROCESSORS 387S/DX to 40 $105 LASER PRINTER HP with 4Mb $260 COMPAQ PROLINEA 8Mb $520 TOSHIBA 2000SX 8Mb $475 46/1900 3.3 4Mb $350 SUN SPARC 10/20 16Mb $1140 PCMCIA 1Mb V2 BAT SRAM $230 2Mb V2 BAT SRAM $380 2Mb V2 FLSH SRAM $380 42Mb V2 HARD DRIVE $560 Sales tax 21%. Overnight delivery. Credit cards welcome. 5-Year Warranty Ring for Latest Prices 1st Floor, 100 Yarrara Rd, PO Box 382, Pennant Hills, 2120. Tel: (02) 980 6988 Fax: (02) 980 6991 (02) 630 3148. Pay by cheque, money order, credit card. SOFTWARE: T Calculator $15; Calculator VGA $25; T Caltcal VGA $30; Parts Data Base $30; Addresses Data Base $30; Accounts Data Base $30; Word processor $35; Micro PCB $40; Zeusplb $150; Sche­matics $110. These are not shareware for information on any program send a $4 postage fee. To order, add $5 and send cheque or money order payable to: G. A. Georgopoulos, 34 Scouller St, Marrickville, NSW 2204. SUBSTITUTE FOR A HANDFUL OF ICs: Parallax “BASIC STAMP”. A gen­er­al purpose small circuit module, it is really a 25 x 50mm board with a computer chip (4MHz PIC 16C56), EE- PELHAM PROM, 8 I/O pins, board space includes prototyping area. Program it on a PC (only 33 instructions) with development kit which includes one “BASIC STAMP” ($249 plus S/T & post), extra modules ($66 plus S/T & post). Send 45c stamp for more information. Parallax distributor and techni­cal support in Australia: MicroZed Computers, PO Box 634, Armi­dale, NSW 2350. Facsimile (067) 72 8987. UNUSUAL BOOKS: Electronic Devices, Fireworks, Locksmithing, Radar Invisibility, Surveillance, Self-Protection, Unusual Chem­ istry and more. For a complete catalog, send 95 cents in stamps to Vector Press, Dept S, PO Box 434, Brighton, SA 5048. June 1994  95 200 Watt Power MOSFET Amplifier Module As published in the June 1994 issue of Silicon Chip. $159 per kit for Bankcard, Master Card or Visa Card Orders; $149 per kit for cheque or money order. Also fully assembled and tested kits for $199 each. Power supplies and cases available for the amplifier module if required. Postage and handling $8; 3kg overnight airbag for anywhere within Australia $10. Computer & Electronic Services Pty Ltd 27 Osborne Avenue, Trevallyn Launceston, Tasmania 7250 Phone (003) 34 4218; Fax (003) 31 4328; Mobile (018) 13 3979    Zelcon Technic Pty Ltd • • • • PCB Supplier Photoplotting Services SMT/Through-Hole Assembly CAD facilitites PO Box 149, Glenorchy, Tas 7010 Ph: (002) 71 8120, Fax: (002) 71 8182 BBS: (002) 73 0799 68705 DEVELOPMENT SYSTEM: In Circuit Simulator/Emulator and pro­ grammer board. Supports 68HC705C8/ C4/J2/K1, 68705P3/U3/R3 micro controllers and more. Contact Robert Priestley, PO 38/4 Illawong Village, Fowler Road, Illawong 2234. Phone (018) 02 0481; Fax (02) 541 0734. KIT REPAIRS and assembly. All work guaranteed. Phone (047) 51 5620 MICASOFT Electronics and Computing tutor program, written in UK, ideal for TAFE, schools, or individual use. Now available in Australia. Send $1.80 in stamps for demo disk (tell us what size). MicroZed Computers, PO Box 634, Armidale 2350. IC R7100 ICOM Communications Receiver new in box; perfect condi­tion; cost $2600, sell $2000. Alan (043) 24 2296. PRINTED CIRCUIT BOARDS for the hobbyist. For service & enquiries contact: T. A. Mowles (08) 326 5590. EPROM & SRAM EMULATOR: 2K x 8 (or 16) to 6K x 8 (or 16). Download and verify via standard PC printer port. Supports Binary, Intel and Motorola hex formats. Includes Binary Editor. 96  Silicon Chip CTOAN ELECTRONICS 4-channel piped music system for your home. Hundreds of dollars cheaper than commercial systems. Build it yourself and save heaps. Ring for details. PO Box 211, Jimboomba 4280. Phone (07) 297 5421. Advertising Index Altronics ................................ 26-28 Antique Radio Restorations.........94 Av-Comm.....................................57 Computer & Electr. Services........96 Ctoan Electronics........................96 RETAIL OPPORTUNITIES NEW ZEALAND David Reid Electronics ..............67 Dick Smith Electronics........... 12-13 Electronic Fault Info.....................43 Harbuch Electronics....................67 Instant PCBs................................95 Jaycar Electronics (Australia) is looking to expand its service to NZ customers by appointing key resellers in that country. If you have a business which you think would benefit by reselling Jaycar products, please contact us. We are particularly interested in retail establishments which are already in the electronic hobby area. This is not to exclude TV/video service, camera stores or other businesses which are related to the sale of technical products. For more information, contact: Bruce Routley,PO Box 185, Concord, NSW 2137, Australia. Fax 612 743 2066. For more information, contact Northern Digital, PO Box 1252, Collingwood, Vic 3066. Fax/Ph (03) 484 5133. WANTED CIRCUIT DIAGRAM for clock/radio/TV ‘Superstar’ model TCR-1001 (11cm TV). Phone (03) 793 3104 WANTED TO BUY buy or borrow: programmers reference manual for Tek­tronics Plotter 4662. Phone (099) 38 1899. ANTIQUE RADIO ANTIQUE RADIO RESTORATIONS: specialist restoration service provided for vintage radios, test equipment & sales. Service includes chassis rewiring, recon­ densering, valve testing & me­ chanical re­­furbishment. Rejuvenation of wooden, bakelite & metal cabinets. Plenty of parts – require details for mail order. About 1200 radios within 16,000 square feet. Two-year warranty on full restoration. Open on Saturday 10am4.30pm; Sunday 12.30-4.30pm. 109 Cann St, Bass Hill, NSW 2197. Phone (02) 645 3173 BH or (02) 726 1613 AH. Jaycar .............................. 45-52,96 L & M Video...................................5 Macservice..................................35 Oatley Electronics.................. 60-61 PC Computers.............................65 Pelham........................................95 Plough Book Sales......................95 RCS Radio ..................................94 Resurrection Radio......................83 Rod Irving Electronics .......... 75-79 Secontronics................................95 Silicon Chip Back Issues....... 86-87 Silicon Chip Binders..................IBC Silicon Chip Projects Book......OBC Silicon Chip Software..................39 Silicon Supply & Manufact...........95 Transformer Rewinds...................95 West Tech Industries.................IFC Wombat Electronics.....................73 Yuga Enterprise...........................73 Zelcon Technic Pty Ltd.................96 _________________________________ PC Boards Printed circuit boards for SILICON CHIP projects are made by: • RCS Radio Pty Ltd, 651 Forest Rd, Bexley, NSW 2207. Phone (02) 587 3491. • Marday Services, PO Box 19-189, Avondale, Auckland, NZ. Phone (09) 828 5730. • H. T. Electronics, 35 Valley View Crescent, Hackham West, SA 5163. Phone (08) 326 5590.