Reg Edwards wrote:
Where is the 50-ohm transmission line on which the SWR is imagined or
supposed to lie?

On my system, there's a 50 ohm cable from the transceiver to
the input of the SWR meter and another 50 ohm cable from the
output of the SWR meter to the balun. Each of these cables
forces the ratio of the voltage to current in each of the
traveling waves to a value of 50 ohms. I have an in-line
Autek WM-1 and no tuner.
--
73, Cecil http://www.qsl.net/w5dxp