‰  NOW 25 WPM  ‰  TEXT IS FROM MARCH 2009 QST  PAGES 35 AND 81  ‰

USING THE VA1.  FOR THIS CALCULATION THE SERIES OF MINIMUM IMPEDANCE
MEASUREMENTS TAKEN DURING THE FREQUENCY SWEEP SEE VELOCITY FACTOR, ABOVE
WERE APPLIED TO THE FOLLOWING FORMULA FROM THE VA1 INSTRUCTION MANUAL LOSS
8R69 X ZMIN/Z0, WHERE Z0 IS THE CHARACTERISTIC IMPEDANCE OF THE LINE.  THE
CALCULATED LOSS IS GIVEN IN TABLE 2.  VALUES FOR RG 174 AND RG 58 AS READ
FROM THE LOG LOG GRAPH IN THE ARRL ANTENNA BOOK ARE LISTED FOR COMPARISON.
NOW, LETS THINK AGAIN ABOUT HOW I PLANNED TO USE THIS FEED LINE A SINGLE
HALF WAVELENGTH BETWEEN TRANSCEIVER AND ANTENNA.  AS THE FREQUENCY
INCREASES SO DOES THE LOSS, BUT THE LENGTH OF A HALF WAVELENGTH OF FEED
LINE DECREASES.  AS A RESULT, THE FEED LINE LOSS REMAINS LESS THAN 1 DB AS
WE GO UP IN FREQUENCY.  IN FACT, THE LOSS OF A HALF WAVELENGTH LINE
DECREASES FROM ABOUT 1 DB AT 80 METERS TO ABOUT 0R5 DB AT 10 METERS.  IF
‰  FROM PAGE 81  ‰
1,136,960 A C NN7SS 12,270 B A K5ZD 1,365,663 A C K5KG 956,202 A C N2BJ
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ