Electrical Communication is a free textbook on the basics of communication technology. See the editorial for more information....

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21-type repeaterThe 21-Type Repeater
22-type repeaterThe 22-Type Repeater
44-type repeaterFour-Wire Repeater
aboutEditorial
absorption of soundThe Transmission of Sound
AC current measurementThermocouples
acoustic radiatorTypes of Acoustic Radiators
acousticsThe Nature of Sound
active transmittersActive or Modifier-Type Telephone Transmitters
aerialAntennas, or Aerials
aerial cableCables and Wave Guides
airplanePrecipitation Static
alignment arrayDirectional Periodic Antennas
all-relay systemAll-Relay Dial Systems
alternating-current bridgeAlternating-Current Bridges
AM broadcast systemsStandard Amplitude-Modulation Broadcast Systems
amplifierHigh-Vacuum Thermionic Three-Electrode Tubes
 High-Vacuum Thermionic Four-Electrode Tubes
 Phase Relations in Amplifiers
 Resistance-Coupled Audio-Frequency Voltage Amplifiers
 Characteristics of Resistance-Coupled Amplifiers
 Transformer-Coupled Audio-Frequency Voltage Amplifiers
 Radio-Frequency Voltage Amplifiers
 Classifications of Power Amplifiers
 Audio-Frequency Class A1 Single Triode Power Amplifier
 Audio-Frequency Class A1 Push-Pull Triode Power Amplifier
 Audio-Frequency Class B Power Amplifiers
 Radio-Frequency Power Amplifiers
 Wideband Amplifiers
amplitude modulationCarrier Telegraph Systems
 Analysis of an Amplitude-Modulated Wave
 Amplitude Modulation or AM
 Amplitude-Modulated Radio Transmitters
 Methods of Amplitude Modulation
amplitude-modulation broadcastAntennas for Amplitude-Modulation Broadcast Stations
angle modulationFrequency and Phase Modulation
antennaProduction of Electromagnetic Waves
 Antennas, or Aerials
 Free-Space Radiation Patterns from Periodic Straight-Wire Antennas
 Ground-Reflection Factors
 Radiation Patterns from Periodic Straight-Wire Antennas
 Directional Periodic Antennas
 Antennas for Amplitude-Modulation Broadcast Stations
 Driving-Point Impedance of Periodic Antennas
 Other Periodic Antennas
 Aperiodic (Non-resonant) Antennas
 The Wave Antenna
 The Rhombic Antenna
 Protection of Radio Equipment
antenna feedersAntenna Feeder Systems and Impedance-Matching Networks
antinodesCurrent and Voltage Distributions on Lossless Lines
antiresonanceParallel (Phase) Resonance
antisidetone circuitAntisidetone Circuits
aperiodic antennaAperiodic (Non-resonant) Antennas
arcMiscellaneous Receivers and Loudspeakers
architectural acousticsReverberation
Armco ironMagnetic Materials Used in Communication
array antennaDirectional Periodic Antennas
articulationArticulation and Intelligibility Tests
artificial larynxThe Production of Speech Sounds
atmospheric noiseNoise in Radio Reception
 Atmospheric Noise
attenuationPropagation Constant of a Transducer
attenuation constantPropagation Constant of a Transducer
 Propagation Constant
attenuation equalizerAttenuation Equalizers
attenuatorPads and Attenuators
audibilityThe Field of Audition
audio frequenciesFrequencies Used in Communication
audio-frequency oscillatorInductance-Capacitance (L-C) Oscillators
audionThe Establishment of Radio Communication
auditoriumAcoustics of Auditoriums
aurora borealisTelegraph Distortion
automatic volume controlThe Demodulation of Frequency-Modulated Waves
AVCThe Demodulation of Frequency-Modulated Waves

Last Update: 2011-06-06