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Old September 5th 05, 04:45 PM
RB
 
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Default assymetrical antenna

I run a 130' dipole fed with ladderline down to a balun , then a coax stub
to the tuner.

During a recent storm, one side of the antenna broke, or was broken by a
falling limb---whichever.

The easy fix is to solder the pieces together, while bracing them
physically.

This would make the side where the break was approx 1' shorter than
previous.

Will my tuner compensate for a 1' assymetrical load?

Any reason not to do this, insofar as loading/performance?


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Old September 5th 05, 05:16 PM
Hal Rosser
 
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Should be no problem.


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Old September 5th 05, 05:52 PM
RB
 
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Thanks.

I think it's one of those deals that goes: yes, there is an imbalance
situation created. But, it's not significant in the big picture.

I can live with that!


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Old September 9th 05, 08:59 PM
Steve Nosko
 
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The original Windom *was* an intentionally off center fed multi-band
antenna. Anybody have info on the Windom from the 40's 40's. Dad used
one, but I don't know what he did.


Steve K,9'D;C.I
"RB" wrote in message
...
Thanks.

I think it's one of those deals that goes: yes, there is an imbalance
situation created. But, it's not significant in the big picture.

I can live with that!




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Old September 10th 05, 02:00 AM
Ham op
 
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Steve Nosko wrote:

The original Windom *was* an intentionally off center fed multi-band
antenna. Anybody have info on the Windom from the 40's 40's. Dad used
one, but I don't know what he did.


Steve K,9'D;C.I


YEP!!

134 feet long.

Fed 46 feet from one end with a SINGLE WIRE [NO COAX, NO TWIN LEAD, NO
BALUN, etc.]. Very good tuning system required. Allegedly something
close to 600 ohms at feedpoint. More wishful thinking than reality. [In
those days people were not obsessed with VSWR = 1.000001 to 1. ]

Some feed lengths produced a 'hot' key or mike. Changed length of
feedline to get rf out of shack. X

80, 40, 20, 10 meters.

All current model 'Windoms' are true fakes !!!



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Old October 5th 05, 07:37 PM
 
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The original Windom *was* an intentionally off center fed multi-band
antenna. Anybody have info on the Windom from the 40's 40's....


Wasn't the design criteria something like "make it 40 feet high and feed
it 40 feet off-center"?
--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)
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Old October 7th 05, 05:36 PM
Richard Harrison
 
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Myron Calhoun wrote:
"Wasn`t the design criteria something like "Make it 40 feet high, and
feed it 40 feet off center."

The Windom was named for the amateur who described it in an article. It
was a 1/2-wavelengrh at its lowest frequency of use. A single feed wire
is connected at 0.34 X the length of the antenna, from one end.

The Windom works best over highly conductive earth using a versatile
matching network to the transmitter.

The 1/3 length feedpoint from one end is about 1/6 the distance from the
antenna`s centerpoint. 40 feet off center, makes the antenna 240 feet
long. This is 1/2-WL at 146 meters. It is 12 meters high. This is 1/4-WL
at 48 meters and
1/2-WL at 24 meters.

Best regards, Richard Harrison, KB5WZI

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