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Old February 23rd 07, 12:08 AM posted to rec.radio.amateur.antenna
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Default Random-length loop antenna for 160-40?


I just took a little survey out in the back yard, with a thought towards
putting up a loop antenna as large as I can and feeding it with ladder
line and an autotuner.

It looks like what I can probably do is manage about 250 feet in length
and about 50 feet between front and back, so that it goes nominally 250
feet by 50 feet by 250 feet by 50 feet, and will be fed at about the
100-foot point in one of the 250-foot legs.

In fact, the loop will be really irregularly shaped, but on average the
250x50 dimensions will probably be not too far off.

The whole thing will be up about 25 feet off the ground (that's about as
high as I can reach with my extension ladder and I really don't have any
practical way to get it up any higher).

The plan would be to use it mostly for NVIS work on 160 through 40 meters,
though if it'll tune up on the higher bands I'll probably use it there
too, from time to time, for whatever good it will do.

What do you all think of my chances of being successful with this antenna
vs. my current 180-foot-long ladder-line-fed inverted vee?

Any truth to the story that "closed" antennas like a loop or a folded
dipole are less noise-susceptible that plain two-legged dipoles?

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Old February 23rd 07, 12:40 PM posted to rec.radio.amateur.antenna
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Default Random-length loop antenna for 160-40?

Eric wrote:
I just took a little survey out in the back yard, with a thought towards
putting up a loop antenna as large as I can and feeding it with ladder
line and an autotuner.

It looks like what I can probably do is manage about 250 feet in length
and about 50 feet between front and back, so that it goes nominally 250
feet by 50 feet by 250 feet by 50 feet, and will be fed at about the
100-foot point in one of the 250-foot legs.

In fact, the loop will be really irregularly shaped, but on average the
250x50 dimensions will probably be not too far off.

The whole thing will be up about 25 feet off the ground (that's about as
high as I can reach with my extension ladder and I really don't have any
practical way to get it up any higher).

The plan would be to use it mostly for NVIS work on 160 through 40 meters,
though if it'll tune up on the higher bands I'll probably use it there
too, from time to time, for whatever good it will do.

What do you all think of my chances of being successful with this antenna
vs. my current 180-foot-long ladder-line-fed inverted vee?

Any truth to the story that "closed" antennas like a loop or a folded
dipole are less noise-susceptible that plain two-legged dipoles?


Hi ,
I think you'd like the loop , Though it is about 250 short for good
efficiency on 160M I run a 256 foot 80M loop here fed with home made
open wire line works great.
try it and enjoy.
73 Dave kc1di
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