Electronics (Mike Jaroch)

Either a stranded conductor (single-conductor cable) or a combination of conductors insulated from one another (multiple conductor cable). Small sizes are commonly referred to as stranded wire or as cords [4].

A group of wires or ribbons of wiring used to interconnect electronic systems and subsystems [14].

The property of an electrical circuit that opposes changes in voltage [2].

The opposition, expressed in ohms, offered to the flow of an alternating
current by capacitance. The symbol for capacitive reactance is X C [2] [9].

An electrical device capable of storing electrical energy in an electrostatic field [2].

This filter is used on extremely high-voltage, low-current power supplies and
also where the ripple frequency is not critical [7].

A type of single-phase, ac induction motor in which a starting winding
and a capacitor are placed in series to start the motor. The values of XC and R are such that the main-winding and starting-winding currents are nearly 90 degrees apart and the starting torque is produced as in a two-phase motor [5].

A microphone in which sound waves vary the resistance of a pile of carbon
granules. May be single-button or double-button [12].

Procedure designed to restore breathing after cardiac arrest. Includes clearing air passages to lungs and heart massage [1].

The frequency of an unmodulated transmitter output [12] [18].

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

(1) One or more digits, produced in connection with an arithmetic operation, that is/are forwarded to another digit place for processing there. (2) The number represented by the digit or digits in (1) above [13].

In a velocity-modulated tube, a grid on which the spaced electron groups induce a signal. The output of the tube is taken from the catcher grid [11].

(1) In an electron tube the electrode that is the source of current flow [6]. (2) The general name for any negative electrode [1]. (3) The negative terminal of a forward-biased semiconductor diode, which is the source of the electrons [7].

The method of biasing a vacuum tube in which the biasing resistor is placed in the common-cathode return circuit, thereby making the cathode more positive with respect to ground [6].

A system in which the cathode circuit is interrupted so that neither grid current nor plate current can flow [12].

Voltage on the cathode is varied to produce the modulation envelope [12].

A process of producing thin film components [14].

An electron tube that has an electron gun, a deflection system, and a
screen. This tube is used to display visual electronic signals [6].

A space totally enclosed by a metallic conductor and supplied with energy in
such a way that it becomes a source of electromagnetic oscillations. The size and shape of the enclosure determine the resonant frequency [11].

An instrument used to measure microwave frequencies [16].

A single unit that transforms chemical energy into electrical energy. Batteries are made up of cells [1].

Connecting the center of an antenna to a transmission line which is then
connected to the final (output) stage of the transmitter [10].

A unit of volume of large rectangular or square conductors. The cross-sectional
area equals 1 square centimeter with a length of 1 centimeter [4].

A carrier frequency assignment, usually with a fixed bandwidth [12].

A letter, digit, or other symbol that is used as part of the organization, control, or representation of information [13].

The ratio of voltage to current at any given point on a transmission line represented by a value of impedance [10].

Represents electrical energy. A material having an excess of electrons is said to have a negative charge. A material having a shortage of electrons is said to have a positive charge [1].

The period of time that a capacitor in an electrical circuit is storing a charge [2].

An inductor used to impede the flow of pulsating dc or ac by means of self-inductance [6] [7].

A joint between two sections of waveguide that provides a good electrical connection without power losses or reflections [11].

The complete path of an electric current [1].

An area equal to that of a circle with a diameter of 0.001 inch. It is used for measuring the cross-sectional area of wires [1].

A unit of volume of a conductor having a cross-sectional area of 1 circular mil
and a length of 1 foot [4].

A circuit in which either the upper or lower extremity of a waveform is fixed at a desired value [9].

The type of operation in which the amplifier is biased so that variations in input signal polarities occur within the limits of cutoff and saturation [7].

The type of operation in which the amplifier is biased so that collector current is cut off for a portion of the alternation of the input signal [7].

The type of operation in which the amplifier is biased so that collector current is cut off for one-half of the input signal [7].

The type of operation in which the amplifier is biased so that collector current is cut off for more than one-half of the input signal [7] [13].

Confusing, unwanted echoes that interfere with the observation of desired signals on a radar indicator [18].

Cable in which the center conductor is separated from an outer conductor by a
dielectric material; used in RF transmission [4].

A type of transmission line that contains two concentric conductors [10].

In teletypewriter operation, code is a combination of mark and space conditions representing symbols, figures, or letters [17].

An expression of the extent to which two inductors are coupled by
magnetic lines of force. This is expressed as a decimal or percentage of maximum possible coupling and represented by the letter K [2].

A definite phase relationship between two energy waves, such as transmitted frequency and reference frequency [18].

Radiation on one frequency [17].

In cw radar an oscillator that supplies phase references to provide coherent
video from target returns [18].

An inductive device made by looping turns of wire around a core [2].

A gas-filled electron tube that conducts without the use of filaments. Cold-
cathode tubes are used as voltage regulators [6].

The element in a transistor that collects the current carriers [7].

The transistor equivalent of a plate modulator. Modulating voltage is applied to a collector circuit [12].

An array with all the elements in a straight line. Maximum radiation is
perpendicular to the axis of the elements [10].

An array system that uses the characteristics of more than one array [10].

A series-parallel circuit [1].

A technique in which a combination of peaking coils in series and parallel
(shunt) with the output signal path is used to improve high-frequency response [8].

A transistor circuit in which the base electrode is the common element to both input and output circuits [7].

A transistor circuit configuration in which the collector is the element
common to both the input and the output circuits [7].

A circuit configuration in which the emitter is the element common to both the
input and the output circuits [7].

In Boolean algebra this law states that anytime the expression A(A + B)= AB or A + AB = A + B appears, it can immediately be simplified to AB without going through the process of using the distributive law, complementary law, or the law of union to simplify [13].

An amplifying detector in which detection occurs in the emitter-base
junction and amplification occurs at the output of the collector junction [12].

Often used in receivers to supply detected and amplified output. The emitter-base junction acts as the detector [12].

The act of a commutator in converting generator output from an ac voltage to a dc voltage [5].

In Boolean algebra this law states that changing the order of the terms in an
equation will not affect the value of the equation. Example: A + B = B + A; A • B = B • A [13].

A mechanical device that reverses armature connections in motors and generators at the proper instant so that current continues to flow in only one direction. In effect, the commutator changes ac to dc [5].

An equipment that compares incoming signals and selects the strongest to be fed to a teletypewriter through a patch panel. This is used in diversity operation [17].

Windings embedded in slots in pole pieces, connected in series with the
armature, whose magnetic field opposes the armature field and cancels armature reaction [5].

The process of overcoming the problems associated with high frequencies in an
amplifier [8].

A number or state that is the opposite of a specified number or state. The negative of a number is often represented by its complement [13].

A number that when added to another number gives a sum equal to the base
of the number system of operation. For example, in the decimal number system, the complement of 1 is 9 [13].

The colors of light produced when two of the primaries are mixed in verlapping beams of light. The complementary colors of light are magenta, yellow, and cyan [10].

In Boolean algebra this law states that the logical addition of a quantity and
its complement will result in 1 and the logical multiplication of a quantity and its complement will result in a product of 0 [13].

(1) A waveform other than a sine wave [9]. (2) A wave that is produced by
combining two or more pure tones at the same time [10] [12].

Machines that have a series field in addition to a shunt field. Such machines have characteristics of both series- and shunt-wound machines [5].

Longitudinal waves that have been compressed (made more dense) as they
move away from the source [10].

A data processor that can perform substantial computation, including numerous arithmetic or logic operations, without intervention by a human operator during the run [13].

Pertaining to the occurrence of two or more events or activities within the same specified interval of time [13].

The ability of a material to conduct or carry an electric current. It is the reciprocal of the resistance of the material and is expressed in mhos or siemens [1] [4] [10].

A partially filled energy band in which electrons can move freely [7].

The ease with which a substance transmits electricity [1].

(1) A material with a large number of free electrons. (2) A material that easily permits electric current to flow [1].

A tubular raceway, usually metal or plastic, for holding wires or cables [4].

Scanning in which the movement of the beam describes a cone, the axis of
which coincides with that of the reflector [18].

Another term for DRIVEN ARRAY [10].

In radar, an object that reflects RF energy; target [18].

An uninterrupted, complete path for current flow [3] [16].

The on-off keying of a carrier [12].

A type of synchro that transmits angular information equal to the algebraic sum or difference of the electrical input supplied to its stator, the mechanical input supplied to its stator, and the mechanical input supplied to its rotor. The output is an electrical voltage taken from the rotor windings [15].

The electrode of a vacuum tube, other than a diode, upon which a signal voltage is impressed to regulate the plate current [6].

Synchro systems that contain control synchros and are used to control large amounts of power with a high degree of accuracy. The electrical outputs of these systems control servosystems, which in turn generate the required power to move heavy loads [15].

A group of components systematically organized to perform a specific control
purpose. These systems are categorized as either closed- or open-loop systems. The main difference between the two is that the closed-loop system contains some form of feedback [15].

A type of synchro that compares two signals: the electrical signal
applied to its stator and the mechanical signal applied to its rotor. The output is an electrical voltage, which is taken from the rotor winding and is used to control a power-amplifying device. The phase and amplitude of the output voltage depends on the angular position of the rotor with respect to the
magnetic field of the stator [15].

A type of synchro that converts a mechanical input, which is the
angular position of its rotor, into an electrical output signal. The output is taken from the stator windings and is used to drive either a CDX or CT [15].

Uses a variation of grid bias to vary the instantaneous plate voltage
and current. The modulating signal is applied to the control grid [12].

In communications, equipment that changes the audio output of a receiver to dc pulses. These pulses are fed to a tty to indicate marks and spaces [17].

A mechanical magnetron tuning device that changes the frequency by
changing the capacitance of the anode cavities [11].

The power lost because of the resistance of the conductors. In transformers
the power lost because of current flow (I) through the resistance (R) of the windings [2] [10] [11].

A method of increasing the number of discrete components in a given space.
Resembles wood stacked for a fireplace [14].

Any material that affords a path for magnetic flux lines in a coil [2].

A half-wave antenna with a reflector consisting of two flat metal surfaces meeting at an angle behind the radiator [10] [18].

The discharge of electricity from a conductor with a high potential [4].

Includes location and repair of equipment failures [16].

The term given to the positions of the rotors of a synchro transmitter and a
synchro receiver when both rotors are on 0 degree or displaced from 0 degree by the same angle [15].

A measure of the quantity of electricity. One coulomb is equal to 6.28 x 1018 electrons [1].

Also called the LAW OF ELECTRIC CHARGES or the LAW OF ELECTROSTATIC ATTRACTION. Coulomb's Law states that charged bodies attract or repel each
other with a force that is directly proportional to the product of their individual charges and inversely proportional to the square of the distance between them [1].

A circuit that counts input pulses [9].

The voltage generated within a coil by a moving magnetic field cutting across the coil itself. This voltage is in opposition (counter) to the moving field that created it. Counter emf is present in every motor, generator, transformer, or other inductance winding whenever an alternating current flows [2] [5].

A network of wire connected to a quarter-wave antenna at one end. The network provides the equivalent of an additional one-fourth wavelength [10].

The process of transferring energy from one point in a circuit to another point, or from one circuit to another [8].

A capacitor used to couple signals [8].

A coupling coil that connects the transmitter to the feeder [10].

A type of linkage between atoms in which the atoms share valence electrons [7].

Cardiopulmonary Resuscitation [1].

The peak of the positive alternation (maximum value above the line) of a wave [10].

The maximum angle at which radio waves can be transmitted and still be refracted back to earth [10].

The maximum frequency at which a radio wave can be transmitted vertically
and still be refracted back to earth [10].

The area of a "slice" of an object. When applied to electrical conductors it
is usually expressed in circular mils [1].

A high-power electron tube that converts dc to microwave power by a
combination of crossed electric and magnetic fields [18].

See SPROCKET TUNER [11].

A natural substance, such as quartz or tourmaline, that is capable of producing a voltage when under physical stress or of producing physical movement when a voltage is applied [9].

A device for artificially growing cylindrical crystals to be used in the production
of semiconductor substrates [14].

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

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

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

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

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

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

Same as CENTER-FEED METHOD [10].

Sharp phase reversals [12].

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

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].

A circuit that detects the presence of RF oscillations and converts them into a
useful form [12].

(1) One complete positive and one complete negative alternation of a current or voltage [2] [10]. (2) A 360-degree rotation of a vector generating a sine wave [12].

A parabolically shaped reflector that resembles part of a cylinder [18].