Re: [OT] "Backward" Baluns

Posted by Alexey Kats on Aug 07, 2010; 9:50am
URL: http://elecraft.85.s1.nabble.com/OT-Backward-Baluns-tp5382873p5383310.html

I don't see why not - just like a transformer, if it was not
reversible it wouldn't work for receiving signals properly. After all
when you receive through it the antenna impedance is scaled back from
200 Ohm to 50 Ohm, is it not? If this is the case it'd scale 50 Ohm
down to 12.5 Ohm just fine.

But... If your antenna has 12.5 Ohm of resistance, what is its
reactance? If it is way too high it will not work efficiently no
matter what balun you use. And out of those 12.5 Ohm, what part of it
is radiation resistance?

On Fri, Aug 6, 2010 at 7:57 PM, Al Lorona <[hidden email]> wrote:

> A 4:1 balun is always shown and talked about with the low impedance 50 ohm on
> the unbalanced side and 200 ohm on the balanced side.
>
> Can it be connected backwards: 50 ohm unbalanced on the high impedance side, and
> 12.5 ohm balanced on the low impedance side?
>
> Al  W6LX
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--
Alexey Kats (neko)
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