It usefully indicates the vector sum of two voltages
proportional to the net voltage and net current. It
also usefully indicates the vector difference of the
two voltages proportional to the net voltage and net
current. Those are extremely useful indications for
the initiated. I agree it is not very useful for the
uninitiated. I trust that doesn't include you.
--
73, Cecil


An SWR meter does NOT usefully indicate the vector sum of two voltages or
the vector difference between two voltages. I've never seen a meter with
such scales.

Even if it did, of what possible use would it be to anyone who is already
reliably informed his transmitter is loaded with 50 ohms.
----
Reg, G4FGQ