Ian, G3SEK wrote:
"---the Bird "wattmeter" is not really a power sensor."

The Bird wattmeter indicates the watts, joules per second rate at which
energy flows, well enough to be accepted as a world standard portable
instrument.

Denigrating the Bird is specious because my statement, "Your Bird
wattmeter will show a forward power but no reflected power---." is true!
The statement only requires the right Bird element to indicate the
presence or absence of energy flow in one direction or the other. The
Bird is eminently capable.

I used the bird because those familiar with it are confident in its
ability to separate forward power from reverse power. IEEE defines power
as energy in motion, so it could be in perpetual circulation and never
used, but it is still power when the volts and amps coincide.

Best regards, Richard Harrison, KB5WZI