Reg Edwards wrote:
Can anyone suggest what else it USEFULLY indicates?

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 http://www.qsl.net/w5dxp



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