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"KL7JR Sloping Vertical Delta Loop 80-6 Meters"
Imagine 9 bands on one wire antenna!
(Updated August 1, 2014

I like loops. I'm amazed at how a "shorted-out antenna" can even work at all more or less so well! My favorite vertical loop for portable and fixed use is described below. (Ref. 1).
I had great results with it from Alaska and the Yukon on my portable outings! It is extremely easy to build and only requires 136 feet of wire and a tuner. No balun or choke coils necessary.
This design simplifies another design I've had good results with over the years (Ref. 2). I wanted to place the feed point at the apex and eliminate the balun. If you can get the apex up about 60 feet you'll have a more perfectly shaped delta loop, but if you can't, (not every ham has a tall tower!), don't worry as the loop will work great sloped or off shaped a bit as well.
Getting mine up 20 feet above my motor home roof (30 feet high total) on a simple mast is what I do. Then I just pull the bottom legs out a bit and tie off to "something" at least 8 feet (for safety) off the ground.

Remember, this loop is above a motor home!

Given halfway decent propagation, this antenna should work a lot of DX in all directions as the other designs have for me. Check out the map below to see what it has done for me so far!

1005 divided by 7.2 MHz =140 feet. KI8GX, (Ref 1. below), found that 136 feet long worked for him, so that is the magic number I will also use to maintain 1 WL on 40 meters which would also allow 80 meter use. So I divided that 136 feet by 3 and rounded the sides to about 45 feet per side. You can use more or less to suit your tuner.
Here's how the loop stacks up:
6M. 7 WL
10M. 4 WL
12M. 3 1/2 WL
15M. 3 WL
17M. 2 1/2 WL
20M. 2 WL
30M. 1 1/2 WL
40M. 1 WL
80M. 1/2WL
Ref. 1 "A One-Masted Sloop" by KI8GX (ARRL MEMBERS ONLY You must log in!)
Ref. 2 "KL7JR Easy Vertical Loop 80-6 Meters" (at Hamuniverse.com) No log in required!

If your having trouble reading the info on the bottom section of the map, it says:
ANT: 150 FT Long Vertical Sloping Loop (somewhat square), 1WL on 40m.
Orientation: East/West with top feed @ 20 FT above motor home roof.
Apex @ 30ft and legs @10ft.
All stations worked on 14Mhz except the KL7'S were on 7Mhz.
Worked about 30 states as well....band conditions in and out all day!


August 1, 2014

This from Paul - KB4GYT

Hi John,
I just wanted to let you know that I built the KL7JR Sloping Vertical Delta Loop and I am having a great time with it.
When I first built it, I fed it from the top (apex about 50 feet or so). After a week I decided to feed it from the corner.
I have used it on most bands but my favorite is 20m.
I am primarily a cw op but I do get on phone as well.
I built the antenna out of solid 14 gauge copper wire - all I had in the garage at the time of the build!
All stuff to build it was on hand-no cost!
Here is a sample of stuff worked with the K3 and 75w:
PY2 15m cw
OH3 40m cw
4K9 20m cw
RA4 20m cw
ZP6 20m cw
9K2 20m cw
E7 15m cw
KH6 20m RTTY
VK2 30m cw
4X4 20m cw
TF3 20m cw
KH2 20m cw
JM7 20m cw
A92 20m SSB
5T0 20m cw worked tonight
I am currently listening to A92HK on the loop. He is peaking S8 and was louder the other night.
It is amazing how much louder some stations are on the loop as compared to the Carolina Windom.
WOW! And all since July 12th, 2014
Thanks for the idea - my first loop since I got my license in 1983...I am sold!
I have been telling other ops about how easy it is to build and how well it performs.
73, Paul KB4GYT in South Carolina



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