[Amps] Power/VSWR readings

[Tom Rauch]

> What the readings tell you - two things, the degree of mismatch at the
> output of the meter (relative to the meter Zo) and the amount of power
> absorbed by the feeder and load downstream of the meter. If the meter
> has perfect isolation between forward and reverse readings (infinite
> directivity) then I think these are valid regardless of the VSWR.

Sometimes 20dB or so is close enough to perfect. 20dB is 1%.

That is not a significant error when the meter itself is 5% or so of 
full scale anywhere on the scale.

Read the measurements I posted, or better yet make some 
measurements of your own.

The Bird meter works just fine if you subtract reflected power from 
forward power.
73, Tom W8JI
W8JI@contesting.com