‰  NOW 13 WPM  ‰   TEXT IS FROM JUNE 2014 QST PAGE 42  ‰

TO FIGURE THE VALUE OF Z WE JUST DIG OUT THE CALCULATOR AND USE Z R2 X2.
IN OUR CASE, 10 2 49 2 50.  IF ITS 10 J49, IT HAS 49 OF INDUCTIVE REACTANCE
BUT STILL AN IMPEDANCE OF 50.  WHATS IT GOOD FOR?  LETS GO BACK TO OUR TOP
BAND DIPOLE.  WITH AN IMPEDANCE OF 4 J1590, IT HAS A RESISTANCE OF 4, WHICH
MEANS THE ANTENNA DOES RADIATE.  HOWEVER, BECAUSE THE RESISTANCE IS SO MUCH
SMALLER THAN THE REACTANCE, THE ANTENNAS IMPEDANCE IS ESSENTIALLY EQUAL TO
1590 OF CAPACITIVE REACTANCE, WHICH IS A LONG WAY FROM THE 50 OF RESISTANCE
ƒ  QST DE W1AW  ‰
WE NEED TO MATCH OUR COAX.  SO WHAT DO WE DO ABOUT IT?  THE GREAT THING
ABOUT REACTANCES BEING IMAGINARY IS THAT THE J1590 OF CAPACITIVE REACTANCE
CAN BE NEUTRALIZED BY ADDING J1590 OF INDUCTIVE REACTANCE.  COOL, HUH?  ADD
OHMS TO OHMS AND GET FEWER OHMS.  YOU CANT DO THAT WITH RESISTORS.  SO IF
WE TAKE A COIL WITH AN INDUCTIVE REACTANCE OF 1590 AND PUT IT IN SERIES
WITH THE ANTENNAS CAPACITIVE 1590 WE GET 1590 1590 0.  THIS LEAVES US WITH
‰  END OF 13 WPM TEXT  ‰  QST DE W1AW  ƒ