[Antennas] J-Pole antennas

[C.Whitaker]

de WB2CPN
The VHF J-Pole design came about prior to WWII, and was
used by US Army in the 100 - 156 MHz range.   It was  used
on HF years before that, but wasn't called a J-Pole.   It was
called a Zeppelin because that's what it was used on.  It kept
the high RF voltages away from the airship.  TRIVIA:  There
have been so many  ideas on what a J-Pole is supposed to
look like that there is no "Right or Wrong" any more.  Now
days they are made to look like miniature Zepps that are
incorrectly fed part way down the 1/4 wave section.  A well
designed J-Pole shouldn't need a choke balun at the bottom,
but the ones made these days do, because of the improper
method of feed.  A highly inflaming subject, we're in here.
End of Trivia.
73  Clete