Tom Ring wrote:

Cecil Moore wrote:
Why is it definite? What is the loss in 50 ft. of LMR-400 at the
frequency of interest when the SWR is 50/8 = 6.25:1?

Ok, I need teaching here. Why would the loss change? The loss on the
line is forced to what happens at the nominal 50 ohms doesn't it? The
SWR shouldn't be able to change it unless the voltage limits are hit I
would think. I need an explanation of why it wouldn't be so.

For the same amount of power delivered to the load, transmission
line losses increase with increasing SWR. For a Z0-matched system:
(PLoad = Pfor - Pref) As the load mismatch is increased, energy
reflected from the mismatched load increases and is re-reflected
back toward the load at the tuner Z0-match point. As the load
mismatch is increased, more energy is stored in the transmission
line during steady-state. This is indirect proof that reflected
energy waves actually exist.
--
73, Cecil http://www.qsl.net/w5dxp

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