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Old August 1st 07, 04:01 AM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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First recorded activity by RadioBanter: Mar 2007
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Default Off-center fed dipole, fed with ladder line?

Rick (W-A-one-R-K-T) wrote:
On page 7-10 of the ARRL Antenna Book 20th Edition, there is a discussion
of "Off-Center-Fed Dipoles". It shows a dipole 130 feet long, fed 45.3
feet (a bit over 1/3 wavelength) from one end with a 4:1 balun, then coax
to the shack, and used on 80 thru 20.

I'm wondering if I can feed that with ladder line instead of coax and
balun.


My 1957 ARRL Handbook shows the OCF fed with 300 ohm
twinlead using an air-core balun which was popular
at that time. The feedline will radiate some but
that may not be a bad thing. (The Carolina "Windom"
feedline is designed to radiate.) Link coupling,
as used in the Johnson Matchboxes, would minimize
the common-mode current at the tuner.
--
73, Cecil http://www.w5dxp.com