=  NOW 13 WPM  =
PUSHING RF TOWARD YOUR ANTENNA.  HOWEVER, THE COMBINATION WAVE IS
CONSTANTLY PULSATING IN VALUE.  THE SWR IS DEFINED AS THE MAXIMUM VOLTAGE
OF THE COMBINATION WAVE DIVIDED BY THE MINIMUM VOLTAGE OF THE COMBINATION
WAVE.  IN THE SITUATION OF A 3 1 SWR, THE MAXIMUM VOLTAGE OF THE
COMBINATION WAVE IS 1R5 TIMES THAT OF THE INCIDENT WAVE.  THE MINIMUM
VOLTAGE IS HALF THAT OF THE INCIDENT WAVE.  THIS GIVES AN SWR OF 1R5
DIVIDED BY 0R5, WHICH IS 3 1.  THE HIGHER THE SWR ON THE LINE, THE HIGHER
<  QST DE W1AW  =
THE MAXIMUM VOLTAGE WILL BE.  THE REFLECTED VOLTAGE CANNOT BE HIGHER THAN
THE INCIDENT VOLTAGE.  FOR EXAMPLE, EVEN WITH AN SWR OF INFINITY, THE
REFLECTED VOLTAGE EQUALS THE INCIDENT VOLTAGE.  THIS MEANS THAT THE
COMBINED FORWARD AND REFLECTED VOLTAGE WILL REACH A PEAK OF TWICE THE
INCIDENT VOLTAGE.  EVEN WITH AN INFINITE SWR AND POWER OF 1500 W, YOU WOULD
NEED A LIGHTNING PROTECTOR THAT CAN HANDLE 6000 W.  OF COURSE, YOUR
=  END OF 13 WPM TEXT  =  QST DE W1AW  <