Think of the OCFD as a end-fed antenna with a small counterpoise (or a vertical lying on its side ;-) Iconnect the shield of the coax to the short legof the off-center-fed dipole. I honestly do not know if this is preferable as I have not done any comparative testing of the resu...
Here I describe an off center end fed (OCEF) dipole of my own design that is physically end-fed, but electrically off-center fed. I needed a simple-to-deploy antenna for portable use that I could easily stow in a small DX go-bag along with a Yaesu FT-817 radio and a tiny Elecraft...
This antenna works without a tuner over the entire bandwidth of the 80, 40, 30, 20, 15 and 10m-band, simply by adjusting the output-tank of your tube power amplifier. --If your final output stage is a transistor amplifier, you definitely will need an antenna-tuner though.-- In such,...
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In the classic 1/2-wavelength dipole antenna, you have two equal lengths of wire, each 1/4 wavelength at your chosen frequency. These two wires meet in the middle, where they attach to the center and braid conductors of your coaxial cable. The impedance at the center is reasonably close ...