Joe,
I am in the planning stage of trying a delta loop, apex up.
Doesn't this apply to a delta too ? For vertical radiation, feed 1/4 wave
down from the top (apex) ?
Bob
K6UJ
On 5/26/16 9:58 AM, Joe Subich, W4TV wrote:
On 5/26/2016 12:31 PM, Jim Thomson wrote:
## Instead of feeding in the lower corner, if you really wanted 100%
true vert radiation, then feed it part way up on one side. I believe
it had to be fed 1/3 the way up one side of the loop. Then route
the coax straight across from the elevated feedpoint....to the
tower, then down the tower to shack.
That depends on the aspect ratio of the loop. The correct feed point
for maximum vertical polarization is 1/4 wave down from the apex. If
you have a true equilateral triangle, the feedpoint will be 1/3 of the
way up from the corner ... if the loop is "flatter" (lower tower) the
feedpoint will be farther from the corner.
73,
... Joe, W4TV
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