"Michael St. Angelo" wrote in message
...
QST had an article about a 20 meter halfwave vertical that was end fed
with a coaxial matching section for 50 ohm feed.
It was essentially a j-pole constructed from coax. It was in a 1980-early
1990 issue of QST. Does anyone recall the article
and the issue?

Thanks,

Mike N2MS

Here is the NIST WWV web page that Mac, N8TT referenced !
http://tf.nist.gov/timefreq/stations/wwv.html
WWV Antennas

The WWV antennas are half-wave vertical antennas that radiate
omnidirectional patterns. There are actually 5 antennas at the station site,
one for each frequency. Each antenna is connected to a single transmitter
using a rigid coaxial line, and the site is designed so that no two coaxial
lines cross. Each antenna is mounted on a tower that is approximately one
half-wavelength tall. The tallest tower, for 2.5 MHz, is about 60 m tall.
The shortest tower, for 20 MHz, is about 7.5 m tall. The top half of each
antenna is a quarter-wavelength radiating element. The bottom half of each
antenna consists of 9 quarter-wavelength wires that connect to the center of
the tower and slope downwards to the ground at a 45 degree angle. This
sloping skirt functions as the lower half of the radiating system and also
guys the antenna.

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Greg, w9gb