On Feb 9, 5:16*pm, Bruce W. Ellis wrote:
I am considering a horizontal loop antenna that would be "squarish"
(depending on tree locations) and about 400' in circumference. *My
(automatic) tuner is located in my garage (with 100' of coax going to
the shack in the house). *The lead wires for the antenna and ground
are short and direct through the garage wall - I don't envision any
feedline from tuner to the wire loop. *I don't want to use a balun
since there isn't really any feedline *to balance and the impedances
presented to the balun would be all over the (Smith) chart. *Would it
make sense to feed one end of the loop from the tuner and connect the
other loop end to the ground connection near the tuner or just leave
it open (essentially a square longwire antenna)? *I would also have
three counterpoise wires following the loop lying on the surface of
the ground. *The articles that I can find all use openwire feedlines
and balanced tuners (or baluns) but that arrangement doesn't fit my
situation. *Thanks * W0BF

Greetings,

I had a horizontal loop antenna up for several years prior to my
moving to Texas. It was cut for 80 meters and was about 30 feet up in
a square configuration.

I fed it with coax to one corner, however I had a homebrew choke at
the connection point. I used a 10" long piece of 6 inch pvc pipe with
about 10 turns of coax around it.

The antenna worked fairly well and by virtue of the design loops are
pretty quiet.

You mention 400 feet on your loop. The formula I used was 1005/
frequency = feet in loop.

There is a yahoo group devoted to skywire loop antennas and some good
info can be found there.

At the present time I'm getting ready to erect an 80 meter loop, but
this one will be fed with 600 ohm homebrewed ladder line into a
Palstar balanced wire tuner. I'm anxious to get this on the air.

73

KI4BUN / AAV6TP TX