Silicon ChipMarket Centre - June 1993 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Back to the superheterodyne
  4. Order Form
  5. Feature: Dick Smith's Trans-Australia Balloon Attempt by Leo Simpson
  6. Project: Build An AM Radio Trainer; Pt.1 by Marque Crozman & Leo Simpson
  7. Project: Remote Control For The Woofer Stopper by Darren Yates
  8. Project: A Digital Voltmeter For Your Car by Darren Yates
  9. Serviceman's Log: Some customers can be a real pain by The TV Serviceman
  10. Project: Windows-Based Digital Logic Analyser; Pt.1 by Jussi Jumppanen
  11. Feature: Amateur Radio by Garry Cratt, VK2YBX
  12. Vintage Radio: A look at high tension filtering by John Hill
  13. Project: Remote Volume Control For Hifi Systems; Pt.2 by John Clarke
  14. Feature: Computer Bits by Darren Yates
  15. Feature: Remote Control by Bob Young
  16. Product Showcase
  17. Back Issues
  18. Feature: The Story Of Electrical Energy; Pt.24 by Bryan Maher
  19. Notes & Errata: Woofer Stopper, May 1993
  20. Market Centre
  21. Advertising Index
  22. Outer Back Cover: Philips Test & Measurement

This is only a preview of the June 1993 issue of Silicon Chip.

You can view 30 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.

Items relevant to "Build An AM Radio Trainer; Pt.1":
  • Silicon Chip article scan, July 1993 - AM Radio Trainer Pt2 (AUD $10.00)
  • Silicon Chip article scan, June 1993 - AM Radio Trainer Pt1 (AUD $10.00)
  • AM Radio Trainer PCB Pattern [06107931] (Free)
  • Silicon Chip article scan, June 1993 - AM Radio Trainer Pt1 (AUD $10.00)
Articles in this series:
  • Build An AM Radio Trainer; Pt.1 (June 1993)
  • Build An AM Radio Trainer; Pt.2 (July 1993)
Items relevant to "Remote Control For The Woofer Stopper":
  • Silicon Chip article scan, June 1993 - Remote Control For The Woofer Stopper (AUD $10.00)
  • Woofer Stopper Remote Control PCB pattern (PDF download) [03105932] (Free)
Items relevant to "A Digital Voltmeter For Your Car":
  • Car Digital Voltmeter PCB patterns (PDF download) [04105931/2] (Free)
Articles in this series:
  • Windows-Based Digital Logic Analyser; Pt.1 (June 1993)
  • Some customers can be a real pain (June 1993)
  • Windows-Based Digital Logic Analyser; Pt.2 (July 1993)
Articles in this series:
  • Windows-Based Digital Logic Analyser; Pt.1 (June 1993)
  • Some customers can be a real pain (June 1993)
  • Windows-Based Digital Logic Analyser; Pt.2 (July 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)
Items relevant to "Remote Volume Control For Hifi Systems; Pt.2":
  • Remote Volume Control for Hifi Systems PCB patterns (PDF download) [01305931/2] (Free)
Articles in this series:
  • Remote Volume Control For Hifi Systems; Pt.1 (May 1993)
  • Remote Volume Control For Hifi Systems; Pt.2 (June 1993)
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 (May 1993)
  • Remote Control (June 1993)
  • Remote Control (July 1993)
  • Remote Control (August 1993)
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. ANTIQUE RADIO ANTIQUE RADIO RESTORATIONS: specialist restoration service provided for vintage radios, test equipment & sales. Service includes chassis rewiring, recondensering, valve testing & mechanical refurbishment. Rejuvena- tion 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 Saturday 10am-4.30pm; Sunday 12.30-4.30pm. 109 Cann St, Bass Hill, NSW 2197 Phone (02) 645 3173 BH or (02) 726 1613 AH. 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): $20 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 & send it 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. _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ FOR SALE WEATHER FAX programs for IBM XT/ ATs *** “RADFAX2” $35 is a high resolution, shortwave fax, Morse & RTTY receiving program. Suitable for CGA, EGA, VGA and Hercules cards (state which). Needs SSB HF radio & Radfax decoder. *** “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. THE HOMEBUILT DYNAMO: (plans) brushless, 1000 watt at 740 revs. $A85 postpaid airmail from Al Forbes, PO Box 3919 - SC, Auckland, NZ. Phone Auckland (09) 818 8967 any time. _____________ _____________ _____________ _____________ _____________ AN INTERFACE to control the outside world from a PC paral­lel port. 32 bits in. 32 bits out. Units can be cascaded. _____________ _____________ _____________ _____________ _____________ 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. ❏ Bankcard   ❏ Visa Card   ❏ Master Card Card No. ✂ Enclosed is my cheque/money order for $­__________ or please debit my RCS RADIO PTY LTD Signature­­­­­­­­­­­­__________________________ Card expiry date______/______ Name ______________________________________________________ Street ______________________________________________________ Suburb/town ___________________________ Postcode______________ 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 June 1993  95 Short form kit includes software examples. $35 or send $2 for my 3.5-inch promo disk. Don McKenzie, 29 Elles­mere Crescent, Tullamarine 3043. Phone (03) 338 6286. PAY TV & SATELLITE Scrambling News Monthly, with the latest on descrambling techniques & addresses, where to buy SURPLUS COMPONENT SALE STOCK QTYS LIMITED, NO BACK ORDERS 2N3055 $1.20 RESISTORS TIP30C $0.50 MOST VALUES AVAIL. TIP122 $1.20 1/4W M/FILM $3/100 2N7000 $1.50 1/3W CARBON $2/100 2SC2240 $0.60 1/2W CARBON $4/100 VN88 $2.00 1W CARBON $5/100 3N170 $1.50 2W CARBON $8/100 2N5954 $1.50 5W WIREWOUND $0.30 2N3440 $1.20 10W RESISTORS $0.60 CONNER 120MB IDE HARD DISKS $525.00 KEYTRONICS KB 3270PC KEYBOARDS $220.00 HEWLETT PACKARD 545A LOGIC PROBE $55 HEWLETT PACKARD 546A LOGIC PULSER $75 ONE ONLY H.P. CURRENT TRACER 547A $75 ONE BWD 245A DUAL POWER SUPPLY $450 VALVES 1.44MB FDD $95.00 3A4 $8.00 1MB SVGA $125.00 417A $8.00 CHECKIT PRO $179.00 5651 $8.00 MOC3020 OPTO $2.00 5R4GY $8.00 MOC8050 OPTO $1.50 EL32 $8.00 74C161 $2.00 ONE ONLY TBL12/30 TRANSMIT TUBE $2700.00 PHONE OR MAIL ORDERS, CREDIT CARDS ACCEPTED FOR ORDERS $20 & OVER, DISCOUNTS FOR QUANTITY ORDERS SECONTRONICS PO BOX 2215, BROOKSIDE, QLD 4053, PHONE (07) 355 1314 143 GRAYS RD, ENOGGERA, QLD 4051, FAX (07) 855 1014 SHOP OPEN SATURDAY 9AM - 4PM AH (07) 855 1880 MEMORY & DRIVES PRICES AT APRIL 12th, 1993 SIMM 1Mb x 9 1Mb x 3 4Mb (1M x 36) 4Mb x 9 4Mb x 8 8Mb (2M x 36) DRAM DIP 1 x 1Mb 256 x 4 41256 1Mb x 4 70ns 70ns 70ns 70ns 80ns 70ns $53 $49 $210 $215 $195 $450 70ns $6.00 70ns $6.25 80ns $2.50 Z or D $24.00 DRIVES SEAG 42Mb SEAG 89Mb SEAG 107Mb SEAG 130Mb SEAG 245Mb 28ms 14ms 15ms 16ms 12ms $210 $292 $310 $340 $530 IBM PS.2 50/55/70 70/35 90/95 2Mb 4Mb 4Mb $130 $220 $220 TOSHIBA T3200SX T44/6400 T5200 T5200 4Mb 4Mb 2Mb 8Mb $270 $240 $150 $500 MAC 1Mb x 8 - 100 4Mb P’Book 27C 4Mb15 $16 Sales tax 20%. Overnight delivery. Credit cards welcome. Ring for Latest Prices 1st Floor, 100 Yarrara Rd, PO Box 382, Pennant Hills, 2120. Tel: (02) 980 6988 Fax: (02) 980 6991 VINTAGE RADIO PARTS: numerous new and used valves, knobs and sundry parts. For price list, write to: Airwave Radio Restora­tion, PO Box 333, North Hobart, Tas. 7002. Bargains All in one board with two serial, printer, IBM keyboard, high density floppy & IDE mono video interface. Up to 4Mb RAM, 80286-16cpu, MS-DOS compatible, 130 page manual, small size 170mm x 255mm. Laptop power supply 240V 5V/3A 12V/3A $89 Taped components by the metre app 200pcs, tants, caps, zeners, diodes, resistors $5.95/metre $299 Infrared sets, 1 each IR LED, diode & IDC header $1 Ampro little PC Audio IC hybrids STK043-25 or STK058-40W $9.95 Fujitsu 40Mb hard disks $269 Microbyte-PC230 v30 CPU board, 1Mb RAM installed, 2 serial, print­er, 720Kb floppy, SCS1 hard disk, EGA video, IBM kb interface, made in Australia, surplus $185 ea 720Kb Floppy Drives $55 1.44Mb Floppy Drives $89 We buy surplus computer & electronic products, bankrupt stock and components. P.C. Computers PELHAM 600-600 ohm audio output transformers PCB mount 18Hz38kHz. $9.95 Antique Radio Restorations.........95 A-One Electronics.......................8,9 Av-Comm.....................................21 Cebus Australia...........................35 David Reid Electronics ................3 EEM Electronics..........................96 Emona.........................................55 Harbuch Electronics....................81 Hycal Electronics.........................96 Jaycar ................................... 45-52 JV Tuners.....................................81 Kalex............................................91 Kits Max I/O kit for PCs, 7 relays, ADC, DAC, stepper driver, TTL inputs, with software $169 PC I/O card with 8255 chip 24 I/O lines programmable as inputs or outputs $69 Oatley Electronics...................17,23 PC Computers.............................96 Pelham........................................96 Peter C. Lacey Services..............30 1.5 watt AM broadcast transmitter XTAL locked $49 Philips Test & Measurement....OBC 2.5 watt FM broadcast transmitter 88-108MHz. $49 RCS Radio ..................................95 Digi-125 audio power amp (over 19,000 sold since 1987) 50 watt/8 $14 125 watt/4 $19 New 200 watt/2 version $29 Resurrection Radio......................57 Infrared relay kit $9 Secontronics................................96 Remote control tester $4 36 Regent St, Kensington, SA. Phone (08) 332 6513. Rod Irving Electronics .......... 74-79 Silicon Chip Back Issues........86,87 Silicon Chip Binders....................59 FIX-A-KIT Technical Applications.................84 KIT REPAIR & CONSTRUCTION Tektronix....................................IBC 3 MONTHS WARRANTY ON REPAIRS 12 MONTHS WARRANTY ON CONSTRUCTION TECHNICAL ASSISTANCE HYCAL ELECTRONICS Design, Manufacture & Repair of Electronic Equipment (02) 633 5477 T. A. Mowles EEM Electronics Printed circuit boards for the hobbyist. For service & enquiries contact: Printed circuit board assembly, switchmode power supplies repaired. Design work from start to finish. Ring anytime 9am-9pm Mon-Sun. (08) 3265590 (03) 4011393 96  Silicon Chip Altronics ..........................IFC,60-63 Clarke & Severn..........................35 ICL 286 Board All in one NEC V40 CPU board, MS-DOS compatible, high density floppy. SCSI hard disk, 2 serial, printer, solid state hard disk, IBM keyboard interface, (4W), CMOS single +5V rail, up to 768Kb RAM, 384Kb ROM, 145mm x 250mm, 98page manual. $299 Advertising Index T. A. Mowles.................................96 $41 $270 CO-PROCESSORS 387SX 20/25 IIT $110 387DX All Intel $110 EPROMS the latest descramblers. Send stamp for info. John Papp, Box 37885 Winnel­lie, N.T. 0821. Transformer Rewinds...................95 _________________________________ PC Boards Printed circuit boards for SILICON CHIP projects are made by: • Jemal Products, 5 Forge St, Welshpool, WA 6106. Phone (09) 350 5555. • Marday Services, PO Box 19-189, Avondale, Auckland, NZ. Phone (09) 828 5730. • RCS Radio Pty Ltd, 651 Forest Rd, Bexley, NSW 2207. Phone (02) 587 3491.