If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?
Answer5:1
A tuner at the transmitter can make the transmitter see 1:1 SWR, but it does not change the mismatch at the antenna end of the existing feed line. The line itself still has 5:1 SWR.