Electronics (Mike Jaroch)
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In an antenna, the ratio of its radiated power to that of a reference  .
(1) The electrical power, supplied to a circuit, that does no work and is usually dissipated as heat  . (2) The heat loss in a conductor as current flows through it .
A special purpose tube used to provide high-current gain or power mplification.
Each grid wire is directly in line with the one before and after it, a fact which allows more electrons to reach the plate .
See POWER GAIN .
POWER STANDING-WAVE RATIO
The ratio of the square of the maximum and minimum voltages of a transmission line .
A unit that supplies electrical power to another unit. It changes ac to dc and maintains a constant voltage output within limits  .
Transmitter that uses a series of power amplifiers to create a high level of power .
An amplifier that raises the output of a low-level source for further processing without appreciable degradation of the signal-to-noise ratio .
The rotation of the spin axis of a gyro in response to an applied force. The direction of precession is always perpendicular to the direction of applied force .