[Elecraft] KX3 Antenna Tuner & the T1

Wayne Burdick n6kr at elecraft.com
Tue Jun 21 20:38:03 EDT 2011


Al Gulseth wrote:

> Pardon me if I missed where the details were posted, but I'd like  
> more info on
> the "50' off-center-fed wire" antenna you mention. I'm assuming you  
> mean 50'
> long, but are you using the traditional 1/3 - 2/3 feedpoint or one  
> of the
> other "offsets" that some authors mention?

Entirely random. I'd estimate 45/55, if I were a betting man.


> This sounds like a good possibility for a portable ops "wire in the  
> trees"
> antenna. (My primary portable interest is 40/30/20/15 and I'd like  
> to know
> how it loads on those bands.)

Definitely. In fact I've used this style of antenna with no feedline  
at all: just toss random length wires up into trees in two directions  
and connect them to the two balun inputs.

The 1:1/4:1 switch on the BL2 is also helpful. On bands where the  
antenna presents a difficult impedance, this switch gives the ATU a  
different way to match that is often successful.

73,
Wayne




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