[Antennas] balun and dipole question

[KA8VIT]

The short answers are:

The balun needs to go where you are going from the unbalanced
portion of your antenna system to the balanced portion.

If you are running ladder-line from the outputs on an unbalanced
tuner, to your antenna feed point, you want the 4:1 balun between
the tuner and the feed line at the tuner, because the tuner is
unbalanced and the ladder-line feed line is balanced and so is
the dipole.

If you are running coax from your unbalanced tuner to your antenna
feed point, use 1:1 balun at the antenna feed point because the tuner
and coax are unbalanced and a dipole is balanced.

If you have broadband Internet access you can view an (unedited)
video clip of my station.  In it you'll see my tuner and then my antenna.

http://ka8vit.com/tour/shack2.wmv

Clicking this link will bring up Windows Media Player.  Give the
clip a moment or two to load.

73,

Bill  KA8VIT

RB wrote:

>Some questions about a 140' dipole fed with ladderline from an unbalanced
>tuner to work 160-10m:
>
>1.  Does it matter if the balun is placed on the tuner output, or at the
>dipole center feedpoint?
>
>2.  Which type of balun (voltage/current) would be best for
>centerfeedpoint
>use?
>
>4.  What ratio balun would be optimal for either application?
>  
>
-- 

Bill Chaikin, KA8VIT
USS COD Amateur Radio Club - W8COD
WW2 Submarine USS COD SS-224 (NECO)

ka8vit at ka8vit.com
http://www.ka8vit.com
http://www.usscod.org

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