‰  NOW 13 WPM  ‰  TEXT IS FROM MARCH 2009 QST  PAGES 72 AND 79  ‰

DESIGNATED F0.  A CIRCUIT THAT INCLUDES BOTH TYPES OF REACTANCE IS A
RESONANT CIRCUIT, EVEN THOUGH IT MAY NOT BE OPERATED AT ITS RESONANT
FREQUENCY.  SERIES AND PARALLEL RESONANT CIRCUITS FIGURE 1 SHOWS THE TWO
BASIC TYPES OF RESONANT CIRCUITS SERIES A AND PARALLEL B.  IN THE SERIES
CIRCUIT, THE SAME CURRENT, I, FLOWS IN BOTH L AND C.  THE APPLIED VOLTAGE,
E, APPEARS PARTLY ACROSS THE CAPACITOR, C, AS EC AND PARTLY ACROSS THE
INDUCTOR, L, AS EL.  THESE TWO VOLTAGES ADD TOGETHER TO EQUAL THE SOURCE
ƒ  QST DE W1AW  ‰
VOLTAGE, E EC EL.  THIS IS MUCH LIKE THE FAMILIAR RESISTIVE VOLTAGE
DIVIDER.  IN THE PARALLEL CIRCUIT, INSTEAD OF BOTH COMPONENTS CARRYING THE
SAME CURRENT, THE SAME VOLTAGE, E, APPEARS ACROSS BOTH L AND C.  IT IS THE
CURRENT THAT DIVIDES IN THIS CIRCUIT, WITH THE CAPACITOR CURRENT SHOWN AS
‰  FROM PAGE 79  ‰
81,134 VE7SZ 736,101 RX1CQ 214,800 KH7B 1,671,502 NT4XT 22,797 K0RH 388,803
OM7DX 201,630 4L0A 1,577,532 N0LY 22,144 W2RDS 286,625 RW3AI 192,736 US5D
‰  END OF 13 WPM TEXT  ‰  QST DE W1AW  ƒ