[Elecraft] Balun for KAT2

[Don Wilhelm]

Chas,
In my prior reply, I missed the first question - 'will that disturb balance
of the initially balance(d) transmission line?'

I think not - and my reasoning is that the balance of the transmission line
is determined by the antenna connected to the balanced line - it doesn't
work the other way around.  i.e. you cannot force balance into an antenna
and feedline system unless it is balanced in the first place.  To do
otherwise would be like fooling Mother Nature. (herein is the fallacy of
trying to force balance with a balun - I believe the balun may actually
upset things even more.  A balun to decouple the coax outer shield from the
antenna is a different situation -that part works just fine).

I have always believed (and found to be true) that the balance on an antenna
starts at the ends of the antenna where the current (of necessity) will be
zero.  As one travels back along the antenna elements from each end,
somewhere you will encounter a feedline.  Well, if the currents at this
feedline attachment point are equal and opposite, the feedline will be
balanced - and if they are not equal and opposite, there is nothing to be
done but either accept the imbalance or change the position of the
feedpoint.  If you want a bit of verification on this point - check out L.B.
Cebik's website www.cebik.com and see what he has to say about obtaining
balance with an OCF antenna - both he and I say it just will not happen.

73,
Don W3FPR

----- Original Message -----
From: "Charles Greene" <W1CG@QSL.net
>
> Here's a question that occurred to me.  With a 1:1 coaxial or a W1JR
balun,
> will that disturb balance of the initially balance transmission line? ...