Tom:
You are likely to be disappointed with these ground-mounted verticals for
FD contesting for the following reasons:
1. FD is a domestic US (i.e., non-DX) contest for which a low dipole would
work better than a vertical on 80, 40 and possibly 30M.
2. A short, loaded vertical will not be as efficient and effective as a
full-size 1/4WL radiator.
3. I'm presuming you're going to ground-mount these verticals over a minimal
ground field, resulting in even lower efficiency.
If you want to construct something with PVC, let me suggest either a
single-pole support, 30 feet tall, for two inverted V's for 80 and 40, or two
guyed poles 30 feet tall to support spider-web dipoles (one common coax
feedline) for all three bands. Check out this site on NVIS antennas for ideas:
http://www.w0ipl.com/ECom/NVIS/nvis.htm . A Google or Yahoo! search will yield
even more sources and info.
73 de
Gene Smar AD3F
-------------- Original message ----------------------
From: "Tom Osborne" <w7why@verizon.net>
> Hi All
>
> Some years back, there was an article, I believe in QST, about some vertical
> antennas wound on 2 pieces of pvc pipe. They were for 40, 30 and 20. The
> bottom section was wound for 30/40 and you changed the top section to change
> from 30 to 40. There were 2 sections that were wound for 20. This was all
> built on a pvc pipe frame. Can anyone steer me to that article? I'd like
> to make some for field day this year. Where our club picked to go (why I'll
> never know) there are few if any trees for antennas.
>
> If someone could scan it for me I'd sure appreciate it as I don't have many
> QST's around any more. Thanks and 73
> Tom W7WHY
>
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