‰  NOW 20 WPM  ‰  TEXT IS FROM SEPTEMBER 2018  QST  PAGE 56 ‰

THE SHORT IS REMOVED, DISCONNECTING INPUT POWER FOR 10 SECONDS WILL RESTORE
PROPER OPERATION.  THIS EXAMPLE IS PRESENTED WITH A P CHANNEL MOSFET TO
MAKE THE CONCEPT THE EASIEST TO EXPLAIN AND UNDERSTAND.  THE CIRCUIT AND
OPERATION IS THE SAME WITH AN N CHANNEL MOSFET SEE FIGURE 3, EXCEPT THAT
THE COMPLEMENTS TO ALL THE SEMICONDUCTORS ARE USED, AND DIODES AND VOLTAGES
ARE REVERSED.  THE P CHANNEL MOSFET USED HAS 0R3 ON RESISTANCE.  N CHANNEL
MOSFETS WITH 0R01 ON RESISTANCE CAN BE OBTAINED THAT WILL WORK A LITTLE
MORE EFFICIENTLY AND HAVE A HIGHER WATTAGE RATING.  A 12R6 V, 2 A
TRANSFORMER AND BRIDGE RECTIFIER WILL ALSO WORK WITH THIS DESIGN.
CAUTIONARY ITEMS FOR MOBILE OPERATION  NO ONE ENJOYS OPERATING AMATEUR
RADIO FROM THEIR VEHICLE MORE THAN I DO.  I EVEN STARTED A PERSONAL WEBSITE
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ