of your time, but FUN.
Mel, K6KBE
From: Jim Brown <j...@audiosystemsgroup.com>
To: elecraft@mailman.qth.net
Sent: Saturday, April 2, 2016 10:44 AM
Subject: Re: [Elecraft] 80 Meter loop question
On Sat,4/2/2016 6:45 AM, Clay Autery wrote:
Does anyone have any infor
Thank you Richard! My thoughts exactly! Just pitch your loop up in the air and
USE IT instead of trying to complicate it! My 75m loops is skewed all over the
place, one side is lower than the other, one side sags, oh and one more thing,
I've worked 289 countries with it!!
W5sum
Sent from
In my opinion, conditions such as soil conductivity , slope,
orientation, height, obstacles, metal structures, length of feed line
etc. vary so much it is almost worth just putting it up without getting
too deep into modeling. I definitely would model it, I modeled mine and
then just threw it
Thanks Jim... I've got 4NEC2, but haven't had the time to jump on that
particular learning curve.
I plan to invest in the pay version, may be EZNEC 5.0, I don't
remember. But I'm drinking from several fire hoses at the moment.
Soon, I hope...
__
Clay Autery, KG5LKV
MONTAC
I've been using an 80 m horizontal loop for as long as I have had my license,
about 15 years. It's a bit irregular with two supports on my house and three
in trees, height is 7-12 meters. I feed it with open wire feeder to an
indoor Elecraft 4:1 balun and then use the tuner of the K2 or K3 to
On Sat,4/2/2016 2:20 PM, Chuck - AE4CW wrote:
Properly
sized and fed, they offer well under 2:1 SWR within all the HF bands with
the exception of 60M and 30M and perhaps 80M depending on the installed
height.
BUT -- remember that SWR is NOT a measure of antenna PERFORMANCE -- that
is, how
Clay,
I see you've received offers for data on the feed point impedance and VSWR
of an 80M loop. If you feel you need more just let me know. I have
modeled, built and used a number of 80M loops very successfully. Properly
sized and fed, they offer well under 2:1 SWR within all the HF bands
Modeling is also very educational. You may learn that a proposed antenna is
inferior to a simple dipole. I agree that EZNEC is easy to use and
reasonably accurate.
John KK9A
[Elecraft] 80 Meter loop question
Mel Farrer farrerfolks at yahoo.com
Sat Apr 2 15:20:09 EDT 2016
I agree, I use ver 5
:44 AM
Subject: Re: [Elecraft] 80 Meter loop question
On Sat,4/2/2016 6:45 AM, Clay Autery wrote:
> Does anyone have any information or a link to information data on an 80 meter
> loop's complex impedance and VSWR values across the HF bands?
It's pretty easy to model with NEC, which yiel
On Sat,4/2/2016 6:45 AM, Clay Autery wrote:
Does anyone have any information or a link to information data on an 80 meter
loop's complex impedance and VSWR values across the HF bands?
It's pretty easy to model with NEC, which yields this data in the form a
plot of VSWR vs frequency with data
Clay,
I can run an EZNEC model for you if you give me some more info about the loop.
You said about 45 feet high and assume square. Did you want to feed it in the
middle of one side or at the corner? I will model above average ground
conductivity just to keep all my analyses consistent.
I can
Does anyone have any information or a link to information data on an 80
meter loop's complex impedance and VSWR values across the HF bands?
R, X, VSWR from say 3.5-30MHz or better 1.0-54 MHz, measurements taken
at the loop ends with a short jumper, not a long feed-line. Preferably
with loop
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