You almost never hear of a DC Watt Meter – one just does some mental math with Volts and Amps at the back of one’s head. An AC Watt Meter, on the other hand, can by pretty useful on any workbench.

World's most accurate power meter by Body Rocket makes sure no watts are left unread, Smith gets all nostalgic with new ...

with circuit memory for cumulative kilowatt-hours & elapsing time PORTABLE KILOWATT METER: Compact size with start detection 0.20W, you can virtually monitor most standby or working power ...

Sensitivity refers to the decibel level that a speaker can output with one watt of power from a distance of one meter. As such, higher-sensitivity speakers need less power to produce louder volumes.

This makes Bird meters highly desirable, and therefore quite expensive either brand new or on the swap-meet circuit. But radio amateurs are nothing if not resourceful, and building a homebrew ...