Hello all,
Let me preface this by saying this - I am NOT a phasing expert by any means so
I thought I would tackle a new antenna project this summer and maybe learn
something....or lose more hair! So any ways...I decided to put up a pair of
phased 1/4 wave verticals and phase them via the Christman method. Each
antenna has 2 raised radials. I ran across an article by W4NFR where he did
exactly what I am attempting, BUT I am getting different results....naturally.
I tuned each vertical to 7.100 exactly trying to get the lowest possible
reactance on each. I checked and double check the RG-213 71 degree delay line
and the 84 degree feeds to the verticals. Now, here is the puzzling part -
when I put everything together in my homebrew directional switch box, my
resonant frequencies are considerably higher when I switch between Northeast,
Broadside, and Southwest. The resonant frequencies are near 7.450-7.500 where
R=39 with X=6.
So I must be missing something here.....Anyone else had success with this?
Any help would greatly be appreciated!
DaveKB8NNU
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