On Sun, 4 Jul 2004 12:37:54 -0700, Da Shadow hath writ:
For Field Day we homebrewed a 32 foot vertical out of five swimming pool
poles. Secured to a six foot tripod with spikes in each tripod leg.

snip
Ideas appreciated

At the risk of giving away secret(s) that will require The
Gunnison Valley ARC to bust their butts even harder next year
to remain in the Top Ten of the 1A class, here's the 40M
vertical I built for us. At 2 A.M. it yields DX-style pile ups.
(Of course, "DX-style" pileups can be a curse -- they lower the
Q-rate.) Several times we have achieved 40M-WAS during FD.

It's a 2-element phased vertical made of ten-foot sections
of top-rail fence pipe. Each vertical, of course consists
of 3 sections to get to 30'. Then, a Big Hair Pin made from
10 ga. aluminium wire is pop-rivited to each top section to
Go The Extra Distance.

As best I can do in ASCII art, here's an astronaut's view of
the sucker:

. .
\ /
\ /
\ /
\ /
*-------------*
/ \
/ \
/ \
/ \

Of course, if you're not using a fixed-pitch font on usenet, then
this is a lot of gibberish....

All the guy wires are attached at the 20+ foot level --
just above the 2nd junction (i.e., at the *bottom* of the top
section). The center guy simply runs vertical-to-vertical.
In other words, there are only 4 ground attached guys.
It can be erected by three fellers in calm air (not recommended.)
Four fellers can throw it up easily.

You want to seek out the top rail fence pipe that has *DEEP*
slip fit joints. Ours are about 7".

I've already given away too much. HI!HI!
The phasing harness, the 1/4 wave matching section, the radials, and
controlling the directivity are left as An Exercise For The Student.

73 es gl,
Jonesy
--
| Marvin L Jones | jonz | W3DHJ | linux
| Gunnison, Colorado | @ | Jonesy | OS/2 __
| 7,703' -- 2,345m | config.com | DM68mn SK