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D

DRIVEN ARRAY

An array in which all of the elements are driven [10].

DRIVEN ELEMENT

The element of an antenna connected directly to the transmission line [10].

DRIVER

The final stage of amplification [8].

DRUM-TYPE ARMATURE

An efficient, popular type of armature designed so that the entire length of
the winding is cutting the field at all times. Most wound armatures are of this type [5].


DRY CELL

An electrical cell in which the electrolyte is not a liquid. In most dry cells the electrolyte is in the form of a paste [1].


DRY-AIR SYSTEM

Provides dehumidified air for electronic equipment that is moisture critical [18].

DUAL IN-LINE PACKAGE (DIP)

IC package having two parallel rows of preformed leads [14].

DUAL-GATE MOSFET

A two-gate MOSFET in which either gate can control the conductor
independently, a fact which makes this MOSFET very versatile [7].


DUCTILE

Easily drawn out (as to form filaments or wires) [4].

DUCTING

Trapping of an RF wave between two layers of the earth's atmosphere or between an atmospheric layer and the earth [18].



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