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Vol.9, No.6; June 1996 Contents FEATURES 4 Review: BassBox 5.1 Design Software For Loudspeaker Enclosures It lets you select a speaker and vary the box parameters or select a box and check the performance of various speakers – by Rick Walters 26 ‘MV Oriana’ – Luxury And Technology Afloat REVIEW: BASSBOX 5.1 LOUDSPEAKER DESIGN SOFTWARE – PAGE 4 The “Oriana” is P&O’s newest passenger liner. Here’s a brief rundown on its impressive electrical and propulsion technology. PROJECTS TO BUILD 14 A High-Performance Stereo Simulator New design uses a digital delay chip. Build it and enhance the sound from mono VCRs, AM tuners or electronic instruments – by John Clarke 22 A Rope Light For Party Fun And Frolic Build this simple chaser circuit and drive low-voltage coloured lights arranged in a plastic tube – by Robert Riede 31 Build A Laser Pointer From A Kit Five minutes is all it takes to assemble this nifty laser pointer – by D. Light 40 A Low Ohms Tester For Your DMM This handy test instrument plugs into your DMM and lets you accurately measure resistances down to 0.01Ω – by John Clarke 70 Automatic 10-Amp Battery Charger Need a charger with some oomph? This unit features automatic selection of 6V, 12V and 24V batteries & is short circuit & reverse polarity protected – by Rick Walters HIGH-PERFORMANCE STEREO SIMULATOR – PAGE 14 LOW OHMS TESTER FOR DMMs – PAGE 40 SPECIAL COLUMNS 10 Computer Bits Overcoming the 528Mb hard disc barrier in older PCs – by Geoff Cohen 53 Satellite Watch Another Long March launcher failure – by Garry Cratt 54 Serviceman’s Log Chuck it away and buy a new one – by the TV Serviceman 60 Radio Control Multi-channel radio control transmitter; Pt.5 – by Bob Young 86 Vintage Radio Testing capacitors at high voltages – by John Hill DEPARTMENTS 2 Publisher’s Letter 32 Circuit Notebook 59 Order Form 82 Product Showcase 92 Ask Silicon Chip 93 Notes & Errata 95 Market Centre 96 Advertising Index 10A AUTOMATIC BATTERY CHARGER – PAGE 70 June 1996  1