[HCARC] super antenna

Thu Feb 26 22:49:47 EST 2015

I'll model in EZNEC 5.0 and let the list know the results. 

I do note that part of the magic may come from being up 104 feet. You'll
need four really tall towers or supports. Probably easier to put up a
four-square vertical array - and probably a lot less expensive, plus you can
electronically steer the main lobe.

Dale - K4DG

-----Original Message-----
From: HCARC [mailto:hcarc-bounces at mailman.qth.net] On Behalf Of Lew King
Sent: Thursday, February 26, 2015 6:25 PM
To: 'Hill Country Amateur Radio Club'
Subject: Re: [HCARC] super antenna

Good questions, Don.  It seems to be basically a half wave 160 quad on its
side.

Let me contact my friend in MS about this antenna and see what we can find
out.

Thanks again for the good questions.

Lew

W5LEW

From: W4wj at aol.com [mailto:W4wj at aol.com]
Sent: Thursday, February 26, 2015 6:06 PM
To: w5lew at reagan.com; HCARC at mailman.qth.net
Subject: Re: [HCARC] super antenna

Lew...

Is this thing directional?

On 160 it certainly is lighting up the clouds!

On 80, a 29 degree takeoff angle is quite respectable...

but, where is the lobe??

The antenna is big, but I don't see how it is usable.

For example... if the 40m gain is 12.4 dB at an elevation angle of

15 degrees and 360 degrees of azimuth, well that would  be an

antenna that EVERYONE with the space would erect!!

But, if it works only in one direction, then it would be great for a

fixed point to point circuit, but if you want to work different

directions, then that is a big problem!

73

Don

W4WJ

In a message dated 2/26/2015 3:35:18 P.M. Central Standard Time,
w5lew at reagan.com writes:

A friend in Mississippi sent me some info about a super loop antenna.
Thought you might like to dream of having such and antenna.  Enjoy!

A ham's dream antenna, which I saw when visiting Bob W0JEE in Smiley, TX SE
of San Anrtonio.

Elvin JA3CZY from Osaka came to TX for a visit. He has a 3 element 80M yagi
at 220 ft atop a building and said that W0JEE on 75M SSB was the loudest
signal he ever hears form the USA, beating even the west coast high power
and big antenna guys. So I took Elvin to see Bob in Smiley.

Here's what Bob told me about it.
He has experimented with long wires, vees, rhombics and other designs.
Then enlisted ham friends help to design the best single antenna for all
bands.
There was no literature on the design they eventually came up with.
it is a square loop 282 feet per side square loop at 104 feet over good
ground. 
Wire is from http://thewireman.com/antennap.html
#531 Toughcoat 'Silky' 13 AWG, 19 strand 40% copper-clad steel (OD 0.0795")
with tough, high density, low-gloss polyethylene (Nominal OD, 0.120"
including 0.020" jacket. Designed for through-the-trees, sea coast, acid
rain or other inclement atmospheric conditions. Our most rugged,
longest-lived, stranded antenna wire for any purpose. Jacket has minimal
effect on performance - less than that of a year's accumulation of oxidation
product on bare wire, with less noise. Break strength 400lbs Sag is 3 feet
between steel used oil well drill pipe at corners: 3/4" wall 5" dia 42 feet,
4" dia 42 feet, 3" dia 42 feet nested/welded 7 ft inside each other with 7
feet in concrete in ground. 
Pipe guyed in 3 directions at 120 degrees with 3/8 galv. steel cable at 35
and 70 feet up, 40 feet out from pipe on drill pipe posts 10 feet above
ground and 5 feet below in cement. 

Fed at the SE corner with 265 feet of Ladder line
http://thewireman.com/antennap.html#balanced Wireman # 554
440 ohm, 14 AWG, 19 strand copper-clad steel, same as 552 but designed for
maximum legal power. VF .91 

Bob says he got design help from Bud W5RPU in Allen, TX who figured out with
modeling software what would be the best performing single antenna for all
bands. This one performed best of all:

160M 6.6 db max gain at 49 deg elevation / 80M 11.1 db at 29 deg

40M 12.4 db at 15 deg / 30M 13.5 db at 12 deg

20M 14.5 db at 9 deg / 17M 14.1 db at 8 deg

15M 14.6 db at 6 deg / 12M 15.1 db at 5 deg

10M 15.0 db at 4 deg / 6M 15.3 db at 3 deg

Now that's some fantastic DX antenna! Bob said he spent about $4000 on
materials and labor with volunteers helping. 73, Skip W5GAI

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