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T

TUBE STATIC CONDITION

Refers to the testing condition in which a tube has certain voltages applied
but is not in its normal operating condition [16].


TUNED CIRCUIT

(1) A circuit consisting of inductance and capacitance that can be adjusted for
resonance at a desired frequency [9]. (2) A circuit that is used as a filter which passes or rejects specific frequecies [16]. (3) An LC circuit used as a frequency-determining device [8].


TUNED LINE

Another name for the resonant line. This line uses tuning devices to eliminate the reactance and transfer maximum power from the source to the line [10].


TUNNEL DIODE

A heavily doped semiconductor device that has high gain and fast switching
capabilities [7]. See NEGATIVE-RESISTANCE ELEMENT [11].


TUNNELING

The piercing of a potential barrier in a semiconductor by a particle (current carrier) that does not have sufficient energy to go over the barrier [11].


TURN

One complete loop of a conductor about a core [2].

TURNS RATIO

The ratio of the number of turns in the primary winding to the number of turns in the secondary winding of a transformer [2].


TURNSTILE ANTENNA

A type of antenna used in vhf communications that is omnidirectional and
consists of two horizontal half-wave antennas mounted at right angles to each other in the horizontal plane [10].


TWISTED PAIR

A line consisting of two insulated wires twisted together to form a flexible line without the use of spacers [10].


TWO-DIMENSIONAL RADAR

(2D)—Measures the range and bearing to a target [18].


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