|[AMRadio] Loop antenna feed question|
jpl15 at panix.com
Sun Dec 4 13:34:24 EST 2005
Well - my Valiant is putting out stable rated power on all bands - this
morning I'll suss out where the audio is disappearing to - should be ready
for Air then... now to turn to the Radiator.
I'm still in the 'steep' part of the EasyNEC learning curve - and I've
gone through the several ARRL antenna books - so I'm properly confused.
I have a loop of 14ga hard copper wire around the rear of my propery,
attached (with insulators spaced at abt 8' apart) to the fence - of about
450 feet diameter, and nearly (but not quite) square. It is about 5' above
the ground, except for one leg which is attached to the house, where it is
about 7'. I am feeding it with 450-ohm ladder-line. My Question to the
Antenna Gurus is this: At the feed-point, should I maintain the
ladder-line spacing where it joins the loop ends, or should there be an
angle, ie. should the loop ends be wider than the feedline pitch - and if
so, what should the included angle of the feedline 'transistion' be...?
I've approached this from two or three analytical directions, and of
course have different (and somewhat exclusive) "answers".... so I'm
Learning, which is a good thing.
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