‰  NOW 25 WPM  ‰  TEXT IS FROM DECEMBER 2013 QST  PAGE 49‰

PORTION OF THE FEED LINE AT CLOSE TO RIGHT ANGLES FROM THE ANTENNA TO
PRESERVE ANTENNA BALANCE.  ADDING A CHOKE BALUN AT THE JUNCTION OF COAX AND
LADDER LINE WAS THE NEXT STEP.  IF THE COAX IS PARALLEL TO THE ANTENNA, ADD
A COILED COAX CHOKE OR TWO ALONG THE COAX TO MINIMIZE COMMON MODE CURRENT
ALL ALONG THE FEED LINE.  THE CHOKE BALUN CAN TAKE MANY FORMS, AS EXPLAINED
IN THE ARRL HANDBOOK AND ARRL ANTENNA BOOK.  I DECIDED AGAINST THE
W2DUSTYLE BALUN OF MANY FERRITE BEADS ON THE COAX BECAUSE OF THE EXPENSE,
AND AGAINST THE COILED COAX BALUN BECAUSE IT IS SOMEWHAT HEAVY AND UNWIELDY
WHEN SUSPENDED BY THE FEED LINE PARTICULARLY IF FORM WOUND.  IT IS ALSO
HARD TO CREATE A SCRAMBLE WOUND CHOKE THAT WORKS WELL OVER THE RANGE OF 40
TO 10 METERS THE EDZ IS TUNABLE ON THE WARC BANDS AND 40 SO I SELECTED A
COMPROMISE BETWEEN ALL THREE DESIGNS.  BALUN IN A JIFFY  MY CHOKE BALUN WAS
EASILY WOUND ON A FERRITE TOROID CORE, USING A BIFILAR WINDING THAT IS
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ