[Antennas] J-poles

Thu Aug 12 20:27:06 EDT 2004

de WB2CPN South Central Pennsylvania 2004年08月12日
With due respect to all concerned, I don't think
the author give any consideration that an antenna
such as an end-fed 1/2 wave can be voltage fed,
not current fed. The Zepplin antenna was a 1/2
wave wire fed with a 1/4 wave, or odd multiple,
open wire transmission line. The transmission
line didn't have to be 1/4 wave, but it had minimum
voltage at the transmitter if it did. I make J-Poles
that don't use the feed coax as a radiator because
the overall antenna is designed like a Zepp. The
coax shield connects at the bottom, not some place
up one side.
73 Clete