"Buck" wrote in message
...
On Sat, 19 Apr 2008 12:00:42 +0100, "Barrett"
wrote:
I have a 60ft garden and my maximum height I can go is only 20ft. I would
like to TX on 80-40 and on 160 if possible but I might be asking the
impossible with the 160m..
I do not have a ground system in place. I can put some earth rods in and
some surface wire but I have no way of putting any wire into the soil
itself. So I am a bit limited.
I have a 150ft of flexweave wire that is uv plastic coated to play with.
I think I have three choices to chose from at the moment.
I can use the SGC-230 with an inverted L.
I can use the SGC-230 with an inverted L with homebrew traps built in.
I can use an inverted L with homebrew traps built in but without the
SGC-230.
What would be the best choice and why?
Many thanks
I am going to give it a WAG and suggest you would be better off
without the traps. Can the tuner be mounted in the weather? Yes
If so,
put it as close to the wire as you can and as high as possible.
If not, does if feed twin-lead? Yes, so far as I know.
If so, could you make a 150 foot
dipole and feed it with twin-lead to the tuner? I would like that
idea best. Even 300 ohm twin lead from Radio shack would be good. This is
out due to getting it through the house wall.
The garden is only 60ft long, so fitting in 150ft won't work here. I could
make a Z up but the end of one end would have to drop to garage roof height
(9ft) and it would put the other end of the Z running (clipped onto the
plastic gutter). This would put the Aerial very close to the house and very
close to the neighbours TV and radio aerial.
The inverted L seems to prefer ground radials, but a dipole or random
wire may be better. If you can go up and only in one direction, could
you run 300 ohm up and tap one end? this would be an end-fed Zep, i
believe, and the tuner should tune it.
I could do but my nax height would be 20ft would this work? Also I have a
20ft scaffold pole note grounded that the G5RV is supported by won't this
interfere with it?
My thoughts are that you will be better off with as much of your 150
feet of wire horizontal in the air rather than in the inverted L
configuration, given your stated restrictions.
BTW, my tuner is manual, but I operated from a 130 foot dipole about
100 feet high fed with RS tv twin-lead for about a year with 100 watts
and did very well.
73 for now
Buck
N4PGW
--
73 for now
Buck, N4PGW
www.lumpuckeroo.com
"Small - broadband - efficient: pick any two."