Re: Balun Questions
Posted by
n7ws on
Jul 23, 2010; 6:58pm
URL: http://elecraft.85.s1.nabble.com/Balun-Questions-tp5328810p5330810.html
I haven't taken, nor at the moment do I have, the time to analyze this, but I'll throw it out.
http://home.earthlink.net/~christrask/Trask4to1Balun.pdfWes N7WS
--- On Fri, 7/23/10, Tom W8JI <
[hidden email]> wrote:
>
> Ok I was referring to a design that was using one core to
> make a
> 4:1... I think the caveat that was being used was
> that they felt they
> could do this and be safe enough with it still being a
> balun as long
> as the load was floating (but I'm not 100% sure thats
> really the
> case)...>>>
>
> I can 100% guarantee you that does not balance the load. I
> know the design
> comes from a source considered reliable, but it is
> seriously flawed. If you
> want a balanced voltage and/or current into a feedline and
> a real antenna,
> it cannot happen with that design. It not only does not
> work in theory, I
> have dozens of actual measurements to support it does not
> work in the real
> world.
>
> <<So is a multi aperture core good enough for that or
> would two toroids
> be a better idea?>>
>
> So long as the multi-aperture core does not have mutual
> coupling between the
> individual transmission line cores, it would work.
> Unfortunately that is not
> likely either. :-)
>
> 73 Tom
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