COAXIAL DIPOLE ANTENNA /
FORMULA
USE
50 OHM COAX
USE
SAME COAX FOR ANTENNA AND FEED LINE
ANTENNA TOTAL LENGTH =
468 / FREQUENCY (LEAVE A LITTLE LONG FOR
SWR ADJUSTMENTS LATER)
AT
CENTER CUT ONLY THE OUTER COVER AND EXPOSE 1" OF THE
SHIELD EITHER SIDE OF CENTER, CUT THE SHIELD INTO TWO 1"
PIGTAILS. (DO NOT CUT CENTER OR CENTER COVER) ATTACH
FEED LINE CENTER AND SHIELD TO PIGTAILS; FEED LINE SHIELD
TO ONE PIGTAIL AND FEED LINE CENTER TO THE OTHER
PIGTAIL
INSTALL IN STRONG WATER PROOF
ASSEMBLY
SHORT
THE COAX AWAY FROM CENTER ON BOTH ENDS
(CENTER TO SHIELD) AT
(492 / FREQUENCY) TIMES THE VELOCITY FACTOR OF THE
COAX
ADJUST ENDS FOR LOWEST
SWR AT DESIRED FREQUENCY
MEASUREMENTS
ARE IN FEET
ELECTRICAL
FORMULAS
HAM CRAFTED ITEMS FOR
SALE
RADIO
DAZE PARTS
CAPACITORS
/ RESISTORS
TRANSFORMERS / CHOKE REWINDS
http://members.tripod.com/tubes_tubes_tubes/transformerrewindingservice/id16.html
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