Indeed the Zepp antenna used in early ham days was the half wave end fed
with a quarter wave of open wire line at right angles to the shack, for
matching. To transform the high end impedance of the dipole to a more
reasonable value for feeding from the rig tank circuit. On a Zeppelin,
it would hang straight down. In modern times, it has been used on 2
meters as the J-Pole antenna, "upside down" to the orientation on the Z
ship, with the feed point below the J-pole. But the antenna Physics
work in either direction.
Extended Zepps and Double Zepps have 5/8 wavelength radiators, with the
double Zepp being center fed with open wire line. These make nice gain
antennas, especially the Double Zepp.
Stuart Rohre
K5KVH
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