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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 |
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