[TowerTalk] Carolina Winsome and vertical radiator question

[Steve Hunt]

However, the OP proposes to use a Balun Designs 4125 at his feedpoint; 
that's a 4:1 voltage balun, which is why I mentioned it :)

"I have chosen Balun Designs 4125 for the 4:1 balun, recommended for a 
true windom and a 1115d Max Choking 1:1 for the "line isolator".

Steve G3TXQ


On 25/01/2015 22:33, Joe Subich, W4TV wrote:
>
>> But of course, if you put a 4:1 voltage balun at the feedpoint the
>> braid isn't connected directly to either leg :)
>
> Which is why the Carolina Window did not use a voltage balun <G>.  I
> believe it used a basic *auto-transformer* - or that's what the one I
> autopsied a few years ago looked like (I had the PVC housing of a CW160
> DMU fail after several years in the Florida sun).
>
> At one time the Carolina Windom "story" indicated the feedpoint DMU
> was designed to force unbalanced current and "force" vertical
> radiation.  That would be consistent with an autotransformer instead
> of a voltage balun.  However, the fixed length of the vertical radiator
> would almost certainly result in different "vertical" components from
> band to band.
>
> 73,
>
>   ... Joe, W4TV
>
>