jawod wrote:

The G5RV antenna can be found by googling. Anyone using this
arrangement. It uses a coax feed to balanced feed (which variously acts
as radiating elements, depending on the band). The author says a balun
is not needed but then describes an RF choke that sounds a lot like a
balun. I am also concerned about TVI with this system.

John


I'm not crazy about them at all. I'm not a fan
of switching feedline types midroute to the antenna.
This applies to other antennas as well. The G5RV
was designed mainly as a 20 meter antenna. I'm
not sure who decided it was the magical platform
for a multiband antenna, but someone did...
Someone should get a rope I think... :/
You would be much better ditching the coax and
choke, and running straight ladder line, if feeding
all bands with a tuner. I think coax fed antennas
should see a proper match at the feedpoint of
the antenna. If I'm going to use coax, I'm going to
run coax the whole way.
Some run the "carolina" windoms the same way pretty
much.. I've directly tested simple coax fed
dipoles against both of these antennas. It was
fairly ugly. The simple dipole thrashed both of them
handily. There is a good bit of loss in all that
feedline clutter. Some bands worse than others.
If you are going to run a tuner and ladder line for
all band use, a simple dipole on the lowest band
to be used is a fairly decent compromise. No need
to add excess feedline clutter. And loss.
If you use ladder line all the way, and tune carefully
using the least inductance, you will have a
fairly efficient system on most all the bands.
Most tuners include a 4:1, but some prefer a 1:1
balun instead.
MK



--
http://web.wt.net/~nm5k