‰  NOW 35 WPM  ‰   TEXT IS FROM JUNE 2014  QST  PAGE 58‰

HINTS KINKS  COASTING ON COASTERS, ANTENNA ARCHERY ADVICE, AND A WIRE
WINDER  STEVE SANT ANDREA, AG1YK, HK ARRL. ORG  ANTENNA PULLEY FROM
DISCARDED CDS  MY DESIGN FOR A HORIZONTAL DELTA ANTENNA ALLOWED THE ANTENNA
TO FLOAT, SUSPENDED BY LARGE DIAMETER PULLEYS AT THE VERTICES SEE FIGURE 1.
BY FLOATING THE DELTA I WOULD EQUALIZE THE TENSION IN THE THREE LEGS AND
THE LARGE DIAMETER PULLEYS WOULD REDUCE BENDING STRESS ON THE ANTENNA WIRE.
I DECIDED TO MAKE MY OWN PULLEYS.  I REALIZED THAT HIGH TECH COASTERS
DISCARDED CDS SEEMED TO BE AN APPROPRIATE DIAMETER SEE FIGURE 2.  TWO CDS
FORM THE OUTER PORTION OF THE PULLEY.  FOR THE INNER PORTION, I USED A 1/8
INCH THICK, 4 INCH DIAMETER PLASTIC DISC.  YOU SHOULD SIZE THE DISC THICK
ENOUGH TO ALLOW THE WIRE OR ROPE YOU WILL RUN THROUGH THE PULLEY TO FIT
LOOSELY BETWEEN THE CDS.  I USED AN INEXPENSIVE HOLE SAW TO CUT THE DISC A
JIG SAW COULD ALSO BE USED.  THE BEARING FOR THE PULLEY IS MADE FROM SOME
SCRAP TELESCOPING ALUMINUM TUBING.  THE FRAME IS MADE FROM TWO 4 x 1 INCH
PIECES OF 1/8 INCH THICK ACRYLIC PLASTIC HELD TOGETHER WITH 8 32 STAINLESS
STEEL SCREWS, WASHERS, AND NUTS.  THE SLEEVE PORTION OF THE BEARING SEE
FIGURE 3 IS MADE BY USING A PIPE CUTTER TO CUT A LENGTH OF 5/8 INCH
ALUMINUM TUBING EQUAL TO THE COMBINED THICKNESS OF THE INNER DISK AND BOTH
THE CDS.  THE SHAFT PORTION OF THE BEARING IS 1/2 INCH OD ALUMINUM CUT
‰  END OF 35 WPM TEXT  ‰  QST DE W1AW  ƒ