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C

CRYSTAL MICROPHONE

A microphone that uses the piezoelectric effect of crystalline matter to
generate a voltage from sound waves [12].


CRYSTAL OVEN

A closed oven maintained at a constant temperature in which a crystal and its holder are enclosed to reduce frequency drift [9].


CURRENT

The movement of electrons past a reference point. The passage of electrons through a conductor. Measured in amperes [1].


CURRENT RATING

The safe current-carrying capacity of a wire or cable on a continuous basis [4].

CURRENT REGULATOR

A circuit that provides a constant current output [7].

CURRENT STANDING-WAVE RATIO (ISWR)

The ratio of maximum to minimum current along a transmission line [10].


CURRENT-FEED METHOD

Same as CENTER-FEED METHOD [10].

CUSPS

Sharp phase reversals [12].

CUTOFF

The condition in a tube or transistor whereby the reverse bias prevents current flow [13].

CUTOFF FREQUENCY

The frequency at which the attenuation of a waveguide increases sharply and
below which a traveling wave in a given mode cannot be maintained. A frequency with a half-wavelength that is greater than the wide dimension of a waveguide [11].



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