But Steve, the original post suggesting the balun specifically said 1:4
impedance ratio to transform open line impedances to a better match in
coax where the coax is also far more tolerant to bends and close
proximity to other conducting objects, so the 1:1 may not be all that
suitable.
I notice in the impedance curve of your 1:1 balun there is a series
resonance about 22 MHz where the reactance gets low which is precisely
the condition with a high impedance antenna where a tuner could tune to
the balun, not the antenna.
73, Jerry, K0CQ
On 11/9/2010 4:14 AM, Steve Hunt wrote:
> Jerry,
>
> That shouldn't happen with a well-designed 1:1 Guanella Balun, which is
> the preferred choice for wide-band, wide-impedance-excusion,
> applications. Unlike a 4:1 Guanella balun or 4:1 Ruthroff balun, the
> core flux in a 1:1 Guanella balun is not determined directly by the load
> impedance / differential-mode voltage.
>
> Here's an example of what I mean by a well designed 1:1 Guanella balun:
> http://www.balundesigns.com/servlet/the-98/isolation-choke-balun-common/Detail
>
> 73,
> Steve G3TXQ
>
>
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