On Oct 25, 11:11 am, Cecil Moore wrote:
Denny wrote:
Assuming the transmitter does not fold back, the 11% reflected power
will not change the signal strength...

True if a match has been achieved by a network.
A 100 watt source will provide 112.4 watts of forward
power with 12.4 watts of reflected power.

Power delivered to the load is 112.4w - 12.4w = 100w

Not true where a 100 watt 50 ohm source is not matched
and provides 100 watts forward with 11 watts reflected.

Power delivered to the load is 100w - 11w = 89w
--
73, Cecil http://www.w5dxp.com

Ahhh, ya namby pambys... My open wire feed line can lick your coax!
And the tuner is a conjugate mirror to boot...
nyaa, nyaa, nyaa...

denny / k8do

Oh yeah, and to add something constructive for the one questioner:
Foldback on transistor amps is to prevent RF voltages rising high
enough to puncture the transistor junction...
Tube radios with pi-net or pi-L tanks had enough matching capability
to handle significant impedence mismatch compared to broadband
transistor amps... Today, that function is served by autotuners, etc...