Noise Bridge vs. SWR meter

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From: Vic Blackwell (blackwel@tlcnet.muohio.edu)
Date: Fri Apr 04 1997 - 12:42:41 EST


Hi gang,
 
I am back with an observation and another source of wonderment.
 
If I set my antenna coupler for minimum SWR (Drake MN75) I use a
certain setting to effect this. If I use my antenna noise bridge
set for X = 0 R = 50 ohms, I get a slightly different setting on
the MN75. Could it be the output impedance of the xmitter is
slightly different from 50 ohms? It leads me to wonder which
tune-up procedure to use. I seem to trust the noise bridge
setting as I get out like I am running 100 watts. If I can hear
them, I can work them. Just curious. Us qrpers need to pursue
all electrical phenomena and explore all possibilities because we
refuse to make up for slop with power.
 
de vic ad8k . .


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