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Old May 15th 09, 08:47 PM posted to rec.radio.amateur.antenna
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Default Conjugate Match and Mismatch Attenuation

On May 15, 1:10*pm, Cecil Moore wrote:

Even the SWR reading looking into ladder-line using an
MFJ-259B is nowhere near the actual SWR on the ladder-
line. For instance, a 50 ohm SWR meter can read a 1:1
SWR on 450 ladder-line when the actual SWR on the ladder-
line is 9:1.


Thanks Cecil, I see what you mean. The 450 ohm line could be seeing an
impedance of 50 ohms making the swr 9:1. The MFJ-259B, being 50 ohm
based, and seeing the 50 ohms would call the swr 1:1. Kind of obvious
but something I probably would have overlooked. I'll get out the
manual for the 259b and see if MFJ cautions the user on this.

73
Dykes AD5VS

 
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