Silicon ChipSatellite Watch - August 1997 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Australia can make those greenhouse reductions
  4. Feature: How Holden's Electronic Control Unit Works; Pt.2 by Julian Edgar
  5. Project: The Bass Barrel Subwoofer by Julian Edgar
  6. Feature: Computer Bits: The Ins & Outs Of Sound Cards by Jason Cole
  7. Project: A 500 Watt Audio Power Amplifier Module by Leo Simpson & Bob Flynn
  8. Order Form
  9. Project: Build A TENS Unit For Pain Relief by John Clarke
  10. Feature: Satellite Watch by Garry Cratt
  11. Project: PC Card For Stepper Motor Control by Rick Walters
  12. Serviceman's Log: Just give it a flamin' good thump by The TV Serviceman
  13. Project: Remote Controlled Gates For Your Home by Phung Mai
  14. Product Showcase
  15. Feature: Radio Control by Bob Young
  16. Vintage Radio: New life for an old Kriesler by John Hill
  17. Back Issues
  18. Notes & Errata: Audio/RF Signal Tracer / 12/24V Motor Speed Controller / Flexible Interface Card for PCs
  19. Book Store
  20. Market Centre

This is only a preview of the August 1997 issue of Silicon Chip.

You can view 34 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:
  • How Holden's Electronic Control Unit Works; Pt.1 (July 1997)
  • How Holden's Electronic Control Unit Works; Pt.2 (August 1997)
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)
Items relevant to "A 500 Watt Audio Power Amplifier Module":
  • 500W Audio Power Amplifier PCB pattern (PDF download) [01208971] (Free)
  • 500W Audio Power Amplifier panel artwork (PDF download) (Free)
Articles in this series:
  • A 500 Watt Audio Power Amplifier Module (August 1997)
  • Building The 500W Audio Power Amplifier; Pt.2 (September 1997)
  • Building The 500W Audio Power Amplifier; Pt.3 (October 1997)
Items relevant to "Build A TENS Unit For Pain Relief":
  • TENS Unit PCB pattern (PDF download) [04307971] (Free)
Items relevant to "PC Card For Stepper Motor Control":
  • PC Stepper Motor Drivers DOS software (Free)
  • PC Card for Stepper Motor Control PCB pattern (PDF download) [07108971] (Free)
Articles in this series:
  • Radio Control (August 1997)
  • Radio Control (October 1997)
SATELLITE WATCH Compiled by GARRY CRATT* Changes to BMAC services from Optus B3 Optus B3: . June 10 saw several changes to BMAC services on this satel­lite, affecting viewers in the Northern Territory and South Aus­tralia. ABC South Australia, ABC Northern Territory and Imparja have all moved in frequency and viewers using non-frequency agile Plessey receivers will need to upgrade their channel allocation chip, in order to tune the new frequencies. Details of all chang­es are carried on the ABC’s Internet web site at: http://ww.abc.net.au/corp/translist/ howtune.htm. Asiasat 2: Recent additions to this satellite include the American government broadcaster “Worldnet” at IF 1270MHz, horizontal polarity, 6.6MHz audio. This service previously operated on Intelsat 511 at 180°E. That service has now been discontinued. Another new broad­ caster on this satellite is “Baztab” TV, an Iranian program, broadcast Monday to Thursday from 2.45-4am AEST. Previously located on Arabsat 2B, this service operates at IF 1470MHz, horizontal polarity. Also sharing the same frequency is “ Mahuga Hadeen TV”, another Iranian broadcaster, which operates Monday to Thursday from 4-5am AEST. Recent changes to the Star TV digital service on this satellite saw the un­ encrypted Sky News UK and Star Plus movie channel disappear, presumably now operating with conditional access. These services were operating at 1250MHz IF. The ESPN digital feeder channel at 1450MHz is still operating “open key”. Panamsat 2: Several new stations appeared during June on this satel­lite. WCETV at IF 1250MHz, vertical polarity, 6.2/6.8 audio, appears to be a Chinese gambling channel operating daily from 11pm-6am AEST. AB Asia, a similar channel operates at 1335MHz IF, vertical polarity. Broadcaster TVSN has added Chinese and Japanese audio chan­ n els to their transponder, on The test pattern from Space TV Systems in Taiwan. 5.55MHz and 5.75MHz respectively. five Chinese channels and two hardThe broadcaster has added similar ad- core XX rated “Exxxstacy” channels. ditional audio subcarriers to their sig- By July 1, the two XX rated channels had been dropped but the others con­ nals on both Asiasat 2 and Palapa C2. tinue testing. One strange appearance on Pas 2 Space TV systems say their subK-band late in June was a 4-channel mence in digital bouquet that included Northern scription service will com­ Territory broad­caster Imparja and ABC September. Although details of the type of digital receiver required are Central. Signals appeared at 1000MHz unknown at present, the signal is IF, horizontal polarity. viewable during the test phase using Nokia, Panasat 630 and Hyundai digi­ Intelsat 802: Intelsat 802 was successfully tal receivers. launch­ed by Ariane V96 on June 25. The satellite will be deployed at 174°E, Gorizont 30: Papua New Guinea broadcaster replacing Intel­ sat 701, which will EMTV has added a new radio broadreplace Intelsat 511 at 180°E. I701 is sched­uled to commence operations at caster to its analog transponder. Loer frequency 180°E in September. These changes cated at audio subcarri­ will effectively eliminate the inclined 7.4MHz, the radio station is called 93FM and broad­ casts a mixture of orbit tracking now re­quired to receive English and local languages. I511. SC Intelsat 702 (177°E): Space TV Systems (Taiwan) commenced trials of their digital service in late June. Early test channels included * Garry Cratt is Managing Director of AvComm Pty Ltd, suppliers of satellite TV reception systems. Phone (02) 9949 7417. http://www.avcomm.com.au August 1997  53