=  NOW 13 WPM  =  TEXT IS FROM JUNE 2023  QST PAGE 30   =

ANTENNA TUNER ARE REQUIRED BECAUSE THE IMPEDANCE SEEN AT THE END OF THE
FEED LINE IS LIKELY TO BE FAR FROM THE RESISTIVE 50 THAT THE TRANSMITTER
EXPECTS TO SEE.  L. B. CEBIK, W4RNL SK, WROTE AN EXCELLENT ANALYSIS OF THE
DOUBLET, CALLED INTRODUCING THE ALL BAND DOUBLET WHAT THE STUDENT AND THE
INSTRUCTOR SHOULD KEEP IN MIND WWW. ANTENTOP. ORG/W4RNL. 001/EDU6.  HTML.
THE DOUBLET DESIGN SHOWN IN FIGURE 1 HAS PROVEN TO BE VERY SUCCESSFUL FOR
ME.  I CHOSE LIGHTWEIGHT MATERIALS TO FACILITATE PORTABLE USE.  THE ENTIRE
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ANTENNA SYSTEM WEIGHS ONLY 10 OUNCES, BUT IT CAN HANDLE 100 W.  THE
DIMENSIONS SHOWN IN FIGURE 1 ALLOW FOR DOUBLET OPERATION ON 40 THROUGH 10
METERS, MAKING IT AN IDEAL ARRL FIELD DAY ANTENNA, ESPECIALLY AS SOLAR
CYCLE 25 RAMPS UP AND THE HIGHER BANDS BECOME ACTIVE AGAIN.  FOR OPERATION
ON 80 METERS, I TIE THE BOTTOM ENDS OF THE FEED LINE TOGETHER AND TREAT THE
ANTENNA AS A TOP LOADED VERTICAL.  IN THIS CONFIGURATION, I ADD A SINGLE 66
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