John Devoldere (ON4UN) wrote:
>> Lastly, many hams think that if they tune their tuner, that their antenna
>> is now a 50 Ohm antenna. WRONG! The only thing a tuner does is to
>> essentially act as a buffer between your exciter and your load. It will
>> not improve a bad antenna. If the antenna has a 15:1 VSWR without the
>> tuner, it still has it with the tuner. You just don't see it.
>
>I THINK THE WORS "BUFFER" IS NOT QUITE APPROPRIATE. IT IS A T R A N S F O R
>M E R WHICH TRANSFORMS DE R+Jx TO 50 OHM, AND GENCE CREATES A PERFECT
>CONJUGATE MATCH FOR A 50 OHM DESIGNED SYSTEM.
Perhaps buffer isn't the right word. Yes, it does transform the
impedance. The conjugate match is between the exciter and the tuner.
However, a tuner does NOT make a 750 Ohm antenna into a 50 Ohm antenna.
That VSWR is still occuring along the feedline of the antenna.
A tuner will not make a bad antenna into a good antenna.
73,
Jon
KE9NA
--------------------------------------------------------------------------
The Second Amendment is NOT about duck hunting!
Jon Ogden
jono@enteract.com
www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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