David Browne wrote:
hi, what would work best a, 54.45 feet,with a MHz trap,inverted L, up about
25-30feet above ground,with no radials ,just the ground,ps, i live in the uk
with good soil, or a 1/2 size g5rv up 25-30 feet high
thanks Dave Browne

In your situation I think you would be better off with the g5rv. With a
good tuner you should be able to run on all the HF bands.

I have found, in the past, that a inverted L doesn't work very well
without ground radials. I experimented with one that was fed at ground
level, traveled up for 25 feet, headed east to a tree branch, and then
south to another tree branch. Total length was about 96 feet. I first
tried to run with only a ground rod but couldn't get a stable match.
Then I started to add ground radials. They were just random lengths of
wire, around 25 feet long, buried about 1 or 2 inched in the ground. As
I added radials the matching became more stable and at around 5 radials
everything matched up great and the antenna worked great.

I live in the desert so my ground conditions are different than yours,
but you still may need the radials.

Martin

--
Martin E. Meserve

http://www.k7mem.150m.com