triode
Three-electrode vacuum tube
A triode is an electronic vacuum tube with three electrodes—a cathode, anode, and control grid.
The grid allows small voltage changes to control larger currents, making triodes fundamental to early amplification and switching.
Triodes powered radios, televisions, and early computers before transistors replaced them.
They persist in high-end audio equipment, where enthusiasts prize their warm sound.
Framework of intersecting lines
- filamentVery thin thread
- heaterDevice producing warmth
- plateFlat dish for food
- envelopeFolded paper enclosure
glass · electron · emission · vacuum · valve · tetrode · pentode · thermionic
Positive return received
- signalMessage-conveying cue
- audioTransmitted sound content
- preamplifierInitial signal amplification stage
- voltageElectrical potential difference
current · impedance · distortion · fidelity · bandwidth · feedback · output · input
Signal-emitting device
- receiverOne who accepts transmission
- tunerDevice selecting broadcast frequencies
- broadcastTransmitted media signal
- shortwaveHigh-frequency radio band
ham · wireless · modulation · demodulation · oscillator · frequency · AM · FM
grid
Framework of intersecting lines
envelope · glass · electron · emission · vacuum · valve · tetrode · pentode · thermionic · getter
gain
Positive return received
- signalMessage-conveying cue
- audioTransmitted sound content
- preamplifierInitial signal amplification stage
voltage · current · impedance · distortion · fidelity · bandwidth · feedback · output · input · bias
transmitter
Signal-emitting device
- receiverOne who accepts transmission
- tunerDevice selecting broadcast frequencies
- broadcastTransmitted media signal
shortwave · ham · wireless · modulation · demodulation · oscillator · frequency · AM · FM · regenerative
resistor
Current-limiting circuit element
- capacitorCharge-storing circuit element
- inductorCoil storing magnetic energy
- transformerVoltage-altering electrical device
rectifier · filter · bypass · B+ · chassis · point-to-point · turret · terminal · wiring · schematic
- Electricity HistoryMichael Faraday, Faraday, Benjamin Franklin, Franklin, Thomas Edison
- early electronicstelegraph, telephone, dynamo, electric motor, electric generator
- vacuum tubesvacuum tube, electron tube, pentode, tetrode, filament
- audio equipmentspeakers, microphone, headphones, amplifier, amplifiers
- Transistorstransistor, bipolar, CMOS, collector, gate
triodetransistor
Semiconductor signal switch
semiconductor · integrated circuit · microchip · silicon chip · vacuum tube