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THE KK5ID 6 METER ROTATABLE DELTA LOOP
Optional Umbrella base!
The 6 Meter
Band may be dead at times, but help bring it to life
Larry's rotatable loop project.
Simple, easy to build and won't
break the bank.
Straight from Gun Barrel City, Texas, (Home of
where antennas are "Smokin" over Cedar Creek
Lake in East Texas.
Get out your weapons, load up this "Six"
shooter and fire a couple of rounds
at 6 meter fun with this
that no lengths or detailed construction info is given for
the supporting mast due to the many variables involved with each
builder's experience. Use your own best method to support the
antenna on the
The Delta Loop is bi-directional,
with usable lobes off the ends and has been one of my favorite
I have found that it will perform quite well in a fixed position.
The 6 meter loop is small enough to erect a form around it and I
have done this with 1/2" electrical pvc schedule 40 pipe
with dowel inserted inside for extra strength. The caps and tees
were put on without glue at first to get the size and shape I wanted
and then it was dismantled one section at a time and glued with pvc
glue. After it was put together, I inserted one self taping screw at
each connection to make sure that it was solid. The design of the
support came from a sleepless night vision.
it funny looking? Sorta! Can it be improved on? Yes. Does it work?
The antenna works best if the "crust" "A"
side in the drawing above of the "pie slice shape" is up and
the support accomplishes this. You are now able to put it in a rotor
and rotate for bi-directional
Impress Your Neighbors
electrical characteristics of the Delta Loop can be found in any
antenna book so I won’t dwell on that aspect. The formula for the
wire is 1005 divided by frequency. Or 20' 5/8" at 50.1. over all
length. Editors note: If
you want to make the Delta Loop free standing a sturdy umbrella
base would make a good base for the antenna on the ground. Just
check out the link above and adjust the support pipe as needed to
fit the base. Now you have a 6 meter rotatable loop sitting on the
ground that can be turned!
The legs then will be 6' 8 3/16". I used 75 ohm
coax, (rg11), because of the close match to the 90 to100 ohm feed
point. 50 ohm line can be used which will have an SWR of 1.8 to 2.0
to 1 at the transmitter. The easiest way to match is with a tuner,
however a matching transformer of 75 ohm cut at a quarter wave
length times the velocity factor (.66) can be used to lower the SWR
when using 50 ohm. To me it is a lot to do about nothing……….cut the
wire, attach the coax, connect to a tuner and get after it. I
painted my support black but you could paint yours red white and
blue. This would surely impress your neighbors. Mine is only up
above the roof line, maybe 30 feet or so and has shown good results
in working Es. Tropo should be a piece of cake and as far as F2,
time will tell. I use a 20 meter multi-band Delta for 40 and up and
it works as good as my tri-bander in the direction of the wire and I
also am able to do quite well off the sides of the wire especially
Es at HF frequencies.
THE ANTENNA THEORY!
My theory is cut the
wire to spec, hang it up, hook it to a tuner and get after
The thing works great! 25 or 30 bucks (2004 prices!) and you
are in business!
Good grief, did I get off on a tangent? Don't
print this the way I presented it. Some electrical genius will punch
my lights out and another DX HOG will swear that I am full of Texas
tumbleweed, tall fish tales and bull _ _ _ _ . Oh well, you know
what I mean. Fact is that 6 meters doesn't need 20 horizontal
elements at 200 feet to be able to work Es from Texas to
Florida!.......Good luck and good
we won't print it exactly as written. Did a bit of censoring here
and there, (after all...this is a family rated web site), corrected
numerous "spellin typos", math errors, terrible use of punctuation
and Texas slang, had to completely re-draw the diagram, look up the
meanings of all those technical words you used and after all
that.......... we still left others a piece of that mouth watering
"pie crust" to chew on!
Another Editors note: Larry can be reached on his
fishing boat for questions about this project.....just start looking
on one end of Cedar Creek Lake, (38,000 acres), in East Texas and go
to the other end....somewhere in between....you'll find him looking
for that 47 pound Bass!
for a picture of his latest Texas Tall Tale
Have fun with Larry's fine antenna
project and pay no attention to his "theory"
or these editors
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