‰  NOW 25 WPM  ‰  TEXT IS FROM AUGUST 2006 QST  PAGES 38, 39 AND 96  ‰
THIS IS A VERY REASONABLE SWR FOR A MULTIBAND ANTENNA, SINCE IT CAN BE
EASILY MATCHED BY MOST WIDE RANGE ANTENNA TUNERS AND WILL NOT CAUSE AN
UNACCEPTABLY HIGH LOSS IN THE COAX.  FOR EXAMPLE, IF THE ANTENNA IS FED BY
100 FEET OF RG 213 AT 7 MHZ, THEN THE MATCHED LOSS WOULD BE ABOUT 0R6 DB,
AND AN SWR OF 4 1 WOULD RESULT IN AN ADDITIONAL LOSS OF ONLY 0R6 DB 15 OF
THE TRANSMITTER POWER WHILE AN SWR OF 5 1 WOULD RESULT IN AN ADDITIONAL
LOSS OF 0R7 DB 17 OF TRANSMITTER POWER COMPARED TO A PERFECTLY MATCHED
TRANSMISSION LINE.  THE RESULTING DESIGN IS A LOOP THAT IS ELECTRICALLY 1
IN THE 20 METER BAND, FED BY A MATCHING SECTION WITH A Z0 OF ABOUT 800 O
THAT IS /2 LONG IN THE 20 METER BAND.  IN THE 40 METER BAND THE MATCHING
SECTION IS /4 LONG AND TRANSFORMS THE HIGH IMPEDANCE OF THE LOOP TO A LOW
IMPEDANCE THAT CAN BE FED DIRECTLY FROM 50 COAX.  IN THE 20 METER BAND THE
‰  FROM PAGE 96  ‰
N3ED/359 N3II/353 N3SL/343 N3UN/349 N4CC/357 N4CH/342 N4JA/352 N4KG/362
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ