Ian White, GM3SEK wrote:
"That statement bears no physical relationship to how this instrument
actually works---."

We`ve been through detailled explanations of how a Bird works. Cecil did
not need to do another. The wattmeter takes actual samples of the
voltages and currents at any single point on the coax. These are
representative of the powers which are moving toward the load and away
from the load. Careful calibration allows indicarions in watts.

An electric current through a speedometer is calibrated to indicate
miles per hour. It works. So does the Bird Wattmeter.

Best regards, Richard Harrison, KB5WZI