PlusRECYCLE IT!Save a fortune with our guide to making a bench supply from an old PC PSU!

PLANET JUPITER RECEIVER i An easy-to-build radio astronomy projecti Listen in to Jupiter and the Suni Includes dipole antenna design

ULTRA-LD 200W POWER AMPLIFIER – PART 2Building and powering this exceptional amp

LOW-VOLTAGE ADJUSTABLE REGULATORJust the job when you need to step down a voltage

$8.75US $10.25CAN £3.95UKSEPT 2010 PRINTED IN THE UK

Sept 2010 Cover.indd 1 29/07/2010 09:24:30