Electronics (Mike Jaroch)

(1) The ratio between the amount of energy propagated from an antenna that is directional compared to the energy from the same antenna that would be propagated if the antenna were not directional [10]. (2) Any increase in the strength of a signal [18].

The number that results when the gain of a circuit is multiplied by the
bandwidth of that circuit. For an operational amplifier, the gain-bandwidth product for one configuration will always equal the gain-bandwidth product for any other configuration of the same amplifier [8].

A crystalline form of lead sulfide used in early radio receivers [7].

A meter used to measure small values of current by electromagnetic or
electrodynamic means [3] [4] [16].

The emitter-to-base current ratio in a common-collector configuration [7].

The process used to tune two or more circuits with a single control [17].

One of the three states of matter; it has no fixed form or volume [1].

As applied to logic circuitry, one of several different types of electronic devices that will provide a particular output when specified input conditions are satisfied. Also, a circuit in which a signal switches another signal on or off [13].

Circuit that permits automatic gain control to function only during short time intervals [18].

An FM demodulator that uses a special gated-beam tube to limit, detect, and amplify the received FM signal. Also known as a quadrature detector [12].

The process of selecting those portions of a wave that exist during one or more selected time intervals or that have magnitudes between selected limits. Also, the application of a specific waveform to perform electronic switching [13].

Test equipment that has the capability, without modification, to generate, modify, or measure a range of electronic functions required to test several equipments or systems of basically different designs [14] [16].

A machine that converts mechanical energy to electrical energy by applying the principle of magnetic induction. A machine that produces ac or dc voltage, depending on the original design [5].

See INPUT END [10].

A grayish-white metal having semiconductor properties [7].

An alkali metal introduced into a vacuum tube during manufacture. It is fired after the tube has been evacuated to react chemically with (and eliminate) any remaining gases [6].

A mechanical frame, with two perpendicular intersecting axes of rotation, used to support and furnish a gyro wheel with the necessary freedom to tilt in any direction [15].

Discharge of electricity through a gas in an electron tube [18].

An inefficient type of armature winding in which many of the turns are
shielded from the field by its own iron ring [5].

A pictorial presentation of the relation between two or more variable quantities, such as between an applied voltage and the current it produces in a circuit [1].

A constant fixed potential applied between the grid and the cathode of a vacuum tube to establish an operating point [6].

The current that flows in the grid-to-cathode circuit of a vacuum tube [6].

A method of changing the center frequency of a resonant cavity by physically
changing the distance between the cavity grids [11].

A self-bias provided by a high resistance connected across the grid capacitor or
between the grid and cathode [6]

(1) The point in a circuit used as a common reference point for measuring purposes. (2) To connect some point of an electrical circuit or some item of electrical equipment to earth or to the conducting medium used in lieu thereof [13].

Unwanted echoes, from surrounding land masses, that appear on a radar indicator [18].

The portion of a ground-plane antenna that acts as ground [10].

Copper planes used to minimize interference between circuits and from external sources [14].

Zero potential with respect to the ground or earth [1].

The distance on the surface of the earth between a radar and its target. Equal to slant range only if both radar and target are at the same altitude [18].

The loss of RF energy each time a radio wave is reflected from the earth's surface [10].

A series of conductors buried below the surface of the earth and arranged in a radial pattern. Used to reduce losses in the ground [10].

Radio waves which travel near the surface of the earth [10].

A radar system used to guide aircraft to safe landings in poor visibility conditions [18].

A type of antenna that uses a ground plane as a simulated ground to produce low-angle radiation [10]

A collection of units, assemblies, subassemblies, and parts. It is a subdivision of a set or system but is not capable of performing a complete operational function [17].

The forward progress velocity of a wave front in a waveguide [11].

A method of mixing P-type and N-type impurities into a single crystal while the
crystal is being grown [7].

A system which provides information that is used to guide a missile to a target
[18].

Abbreviation for gyroscope [15].

A mechanical device containing a spinning mass mounted so that it can assume any position in space [15].