‰ NOW 10 WPM ‰ TEXT IS FROM JANUARY 2017 QST PAGE 34 ‰ FOR THE MOSFET PAIR. ISOLATED POWER SUPPLY A SIMPLE ISOLATED 2 W TRANSFORMER, RECTIFIER, AND FILTER CAPACITOR PROVIDES VOLTAGE LEVELS FOR THE DRIVER SUCH THAT THE DRIVE SIGNALS MATCH THE REQUIREMENTS OF THE SWITCHING MOSFET GATES. FOR BEST EFFICIENCY, THEY REQUIRE 18 V WHEN ON AND 5 V WHEN OFF. AUXILIARY POWER SUPPLY AND 14 V DC REGULATION A TRANSFORMER ‰ END OF 10 WPM TEXT ‰ QST DE W1AW ƒ