If you can, move the bottom of the vertical section in/out from the base
of the tower (assuming it's on one) to see if that change the SWR - does
on mine. You may also want to try changing the horizontal length if you
have/have access to an antenna analyzer.
Joe Hannigan - WDØM
Pagosa Springs, CO
DENNIS BRICKEY wrote:
> I realize this is not a tower question, but the antenna gurus hang out here.
> Hopefully some bandwidth can be tollerated for an antenna question.
> I am working on a 160 meter inverted L and having some difficulty getting the
> match correct. I'd appreciate any input.
> 175' total wire length.....100' vertical 75' sloping horizontal
> 23 (qty) 130' radials.
> Fed with 75 ohm cable hardline through a variable capacitor.
> I've trimmed and extended the vertical section and adjusted the cap with each
> length change. The low swr point is always 2.8:1. Essentially the only
> thing changing is how
> much the capacitor meshes.
> I started with 16 radials and thought adding more would help the match, but
> it has not changed.
> Any Ideas?
> All advice appreciated.
> Dennis N4DD
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