wrote:
SWR meter reads 1:1 at the source with 50 ohm line, that will tell
you that the swr bridge Z and the antenna Z are the same initially (1/2
wave line). Changing to 72 ohm line will still be 1:1.

Here is the original question again: "What would the SWR
be if I substituted the 50 Ohm feedline with a 1/2
wavelength of 72 Ohm feedline?"

Did he ask what would a 50 ohm SWR meter read? NO! He asked
"WHAT WOULD THE SWR BE ..." The SWR would be 72/50=1.44:1
on the 72 ohm feedline. That answers the original question.
--
73, Cecil http://www.qsl.net/w5dxp

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