Vacuum Tube Body of Knowledge
Preliminary List of Terms
A preliminary list of terms relating or related to vacuum tubes has been assembled over a 2+ year period. The next stage in the project will be to create definitions and notes for all terms. This project will result in the publication of a comprehensive vacuum tube glossary. Viewers are invited to help us confirm or correct terms, add or subtract terms, etc. Please submit your help and corrections to vtbok@themuseums.org.
- AF
- AF amplifier
- Absorption
- AC bridge
- AC mains
- AC transformer
- AC/DC
- AC/DC series heater
- Accelerator
- Acorn
- Acorn glass envelope
- Acorn UHF triode
- AF amplifier
- AF modulator
- AF Power pentode
- AF RF oscillator
- Air-cooled
- All-glass
- All-glass miniature
- All-glass valves fitted with (BG) bases
- All-glass VHF/UHF power
- All-metal tube
- AM detector
- AM detector diode
- AM EF Z Sharp-cutoff RF pentode
- AM/FM
- Ampex video recorder
- Amplification
- Amplification factor
- Amplifier
- Amplifier submarine repeaters
- Amplifier telegraphy
- Amplifier tube
- Amplifiers instrumentation
- Analog
- Analog color TV receiver
- Anode
- Anode dissipation
- Anode voltage
- Anode voltage rectifier
- Anodyne anode-dynode beam-deflection amplifier
- Anti-transmit/receive cell
- Anti-transmit-receive
- Arcing
- Argon-filled full-wave gas rectifier
- Atomic clock
- ATR
- ATR cell
- ATR switch
- ATR switch microwave
- Audio amplifier
- Audio beam tetrode
- Audio output
- Audio output beam power tetrode
- Audio output pentode
- Audio output tube
- Audio Pentode
- Audio power amplifier
- Audio power output pentode
- Audio power pentode
- Audio preamplifier
- Audio test
- Audio triode pentode
- Audio TV vertical output
- Audion
- Audiophile
- Audiotron
- Autonomous cathode
- AVC
- AVC bias
- AVC rectifier
- Average
- Backward wave
- Backward wave oscillator
- Backward-wave amplifier
- Ballast tube
- Band
- Barometer
- Barretter
- Barretter photoresistor
- Battery
- Battery radio
- Battery types
- Bayard-Alpert ion vacuum gauge
- Bayard-Alpert ionization gauge
- Beam deflection tube
- Beam power
- Beam power amplifier
- Beam power pentode
- Beam power receiving tube
- Beam power tetrode
- Beam power transmitting tube
- Beam power tube
- Beam switch counter
- Beam switch counting
- Beam switch device
- Beam switch selector -stage
- Beam switch wide-band noise source
- Beam switch
- Beam switching
- Beam tetrode
- Beam tetrode anode cap
- Beam-deflection heptode
- Beam-power pentode
- Beam-switch demultiplexer
- Beam-switch pulse generator
- Beam-switching tube
- BG base
- Bidecal
- Bidirectional counter
- Bigrid amplifier
- Bimetal
- Binary adder tube
- Binary counter
- Binary indicator
- Binary switching tube
- Blemish standard
- Bluetooth
- Bolometer
- Borrow cathode
- Bourdon gage
- Braun tube
- Braun-Ryan tube
- British pin base
- Broadband power pentode
- Broadband spectrophotometer
- Broadcast
- Bulb
- Button
- BWO
- Cable
- Cables
- Caesium-antimony cathode
- Caesium-on-oxidated-silver cathode
- Camera tube
- Camera tube image converter
- Capillary
- Car radio tubes
- Carbon
- Carry cathode
- Cartridge diode
- Cascade
- Cascading
- Cascode circuit
- Cassette
- Cathode follower
- Cathode heated by electron bombardment
- Cathode heated by ion bombardment
- Cathode potential
- Cathode ray
- Cathode ray charge storage tube
- Cathode ray tube
- Cathode ray tube, oscilloscope
- Cathode ray tube, radar indicator
- Cathode ray tube, television
- Cathode subminiature
- Cathode-coupled flip-flop
- Cathode-ray charge storage
- Cathode-ray discharge
- Cathode-ray display
- Cat’s-eye
- Cavity
- Cell Q-band
- Ceramic
- Ceramic envelope
- Ceramic radial-beam pentode forced air cooled
- Ceramic tetrode
- Ceramic tetrode forced-air cooled
- Ceramic triode forced air cooled
- Ceramic triode water cooled
- Ceramic UHF triode forced-air cooled
- Cermet microwave triode
- Character generating cathode ray tube
- Chronotron
- Civil Defense
- Class-A
- Class-A audio driver
- Class-B
- Class-B power output
- Class-C
- Class-C oscillator/amplifier
- Class-C transmitter oscillator/amplifier
- Classifications for bases
- Classifications for connection methods
- Classifications for pin counts
- Classifications for the number of electrodes:
- Classifications of active elements in tubes
- Clipperrectifier
- CM-band
- Coaxial
- Coaxial power triode
- Code
- Coil vacuum sealed
- Cold cathode
- Cold cathode character display tube
- Cold cathode counter display tube
- Cold cathode Crookes tube
- Cold cathode fluorescent lamp
- Cold cathode gas diode
- Cold cathode indicator tube
- Cold cathode ion x-ray tube
- Cold cathode rectifier valve
- Cold cathode trigger
- Cold-cathode Nuvistor
- Cold-cathode SQ tube
- Cold-cathode tube
- Cold-cathode water vapor discharge tube
- Color TV receiver
- Combined diode-pentode
- Combined triode-diode
- Combined triode-hexode triode-heptode
- Combined triode-octode
- Combined triode-pentode
- Combustion
- Common-cathode counter
- Common-cathode pair
- Compactron
- Compactron dual triode
- Compactron high-mu dual diode
- Compactron high-mu dual triode
- Compactron high-mu triple triode
- Compactron pentode
- Compactron Triple triode
- Complex wave generator
- Component
- Composite
- Computer counter trigger
- Computer counter triode gas
- Computer monitor
- Computer rated
- Computer tube
- Condenser
- Conduction cooled
- Conductive coating
- Conelrad
- Console radio
- Contact potentials
- Continuous wave
- Continuously transmitting tube
- Control grid
- Controllable gas diode
- Conversion mixer
- Conversion oscillator
- Converter
- Cooled anode transmitter
- Coolidge tube
- Co-planar triode
- Corona discharge tube
- Corona high-voltage regulator
- Corona voltage regulator
- Counter
- Counter / selector
- Counter tube
- Counter/selector
- Counter/timer
- Counting indicator
- Counting tube
- Cross field amplifier
- Crossed-field amplifier
- CRT
- CRT digital mass memories
- CRT dual gun
- CRT indicator
- CRT lock-in base
- CRT oscilloscope
- CRT oscilloscope distributed deflection
- CRT oscilloscope dual beam
- CRT radar magnetic deflection
- CRT ruggedized
- Crystal rectifiers
- Current
- Current limited diodes
- Current limited diodes noise generator
- Current regulator
- Current stabilizers
- Custom triode
- Customized heater
- CV Power triode
- Cyclotron
- Cyclotron resonance maser
- Cylindrical glass
- Cylindrical glass envelope
- Cylindrical octal
- Damper diode
- Damper/efficiency diode
- Dark current
- DC current
- DC filament
- DC-coupled power triode
- Decade counter
- Deflection amplifier
- Deflection screen
- Dekatron
- Delay line
- Detector
- Detector diode
- Detectors
- Dielectric
- Digital indicator
- Diheptal
- Diode
- Diode damper HV
- Diode detector
- Diode noise generator
- Diode pentode
- Diode plates
- Diode rectifier
- Diode rectifier clipper
- Diode rectifier full wave
- Diode rectifier mercury
- Diode sharp-cutoff pentode
- Diode UHF
- Diode UHF micropup
- Diode UHF pencil
- Diode UHF power oil-can
- Diode UHF TR switch
- Diode voltage reference
- Diodes
- Dip
- Directly heated
- Directly heated beam power tetrode
- Directly heated dual AF (push-pull) power pentode
- Directly heated high-mu triode
- Directly heated low-mu RF triode
- Directly heated oxide-coated filament
- Directly heated power triode
- Directly heated remote-cutoff RF tetrode
- Directly heated RF power pentode
- Directly heated sharp-cutoff RF tetrodebase
- Directly heated thoriated tungsten filament
- Directly heated triode-heptode mixer
- Directly heated tungsten filament
- Discharge
- Disc-seal construction
- Disk-seal planar UHF power triode
- Displacement sensor
- Displacement vibration sensors
- Display
- Display cathode count
- Display/Indicator
- Distortion
- Doherty configuration
- Door-knob tube
- Double diode
- Double electrostatic deflection
- Double pentode
- Double tetrode
- Double triode
- Double-diode high-mu triode
- Double-diode semiremote-cutoff pentodes
- Double-diode sharp-cutoff pentode
- Drawn
- Driver
- Driver triode
- Dry-cell
- Dual anode top cap
- Dual audio and RF triode
- Dual beam amplifier low voltage
- Dual beam power tube
- Dual class-b power triode
- Dual detector diode
- Dual detector diode medium-mu triode
- Dual diode
- Dual diode and remote-cutoff pentode
- Dual diode detector
- Dual diode high-mu triode
- Dual diode high-mu triode miniature version
- Dual diode medium-mu triode
- Dual diode octal base
- Dual diode/high-mu triode
- Dual getter
- Dual high-mu triode
- Dual low-mu triode
- Dual medium-mu triode
- Dual medium-mu triode loctal version
- Dual pentode
- Dual power pentode
- Dual power tetrode
- Dual power triode
- Dual rectifier diode
- Dual RF triode
- Dual shielded triode indirectly heated
- Dual small signal diode
- Dual transmitting triode
- Dual triode
- Dual triode high-rel AU
- Dual Triode Medium g
- Dual Triode with internal shield
- Dual-anode pentode
- Dual-sensitivity tuning indicator
- Dual-tetrode-style pentagrid converter
- Dual-transmit-receive
- Duodecal
- Duplex
- Duplex diode sharp-cutoff pentode
- DV Medium-mu Nuvistor triode
- Dynamic speaker
- Dynatron
- Dynode
- Earthed center-tapped secondary
- EHF transmitter
- Electric arc shock
- Electrical discharge lamps
- Electrical output
- Electrode support
- Electrolytic
- Electromagnetic CRT
- Electromagnetic testing
- Electro-medical
- Electrometer
- Electrometer amplifier
- Electrometer Triode
- Electrometer tube
- Electrometer tube vacuum gauge
- Electron microscope
- Electron multiplier
- Electron ray indicator
- Electronic flash tube
- Electron-ray
- Electron-ray indicators
- Electrostatic
- Electrostatic cathode-ray
- Electrostatic CRT
- Electrostatic deflection
- Electrostatically controlled
- Encapsulation
- ETL computing tube
- Evaporator
- Exceptionally long service life
- Exode
- Experimentals
- Eye tube
- FM quadrature detector
- Fast-wave
- Fast-wave electron
- Filament
- Filament rating
- Filament tube
- Filament voltage
- Filamentary cathode
- Final amplifier
- Finebeam tube
- First AF stage
- First detector
- Flakeless mica spacers
- Flash Tube
- Flash tube lamps
- Flash-over
- Flat wire-ended pencil tube
- Flatness
- Fleming valve
- Flip-flop
- Flow calibration
- Fluorescent
- Fluorescent lamp
- Fluxing
- Flying-spot scanner
- FM discriminator
- FM ratio detector
- FM receivers
- FM RF amplifier
- FM RF converter
- Forced-air cooled
- Forced-air cooling
- Forward wave
- Four-diode bridge rectifier
- Free electron laser
- Free-air convection
- Frequency changer
- Frequency divider
- Frequency meter
- Frequency multiplier
- Frequency selection
- Full wave gas rectifier
- Full wave rectifier
- Full wave vacuum rectifier
- Full-wave rectifier
- Full-wave rectifier octal base
- Fully shielded
- Gain
- Gain group denotations
- Gamma ray detector
- Gas
- Gas diode
- Gas discharge
- Gas discharge systems
- Gas electron
- Gas laser
- Gas noise generator
- Gas pressure measuring
- Gas rectification
- Gas sampling
- Gas switching
- Gas thyratron tetrode
- Gas thyratron triode
- Gas triode
- Gaseous rectifier
- Gas-filled
- Gas-filled cold cathode tube
- Gas-filled cold-cathode
- Gas-filled cold-cathode transmit/receive tube
- Gas-filled full-wave rectifier
- Gas-filled half-wave rectifier
- Gas-filled indirectly heated tetrode thyratrons
- Gas-filled phototube blue sensitive
- Gas-filled phototube daylight sensitive
- Gas-filled phototube IR sensitive
- Gas-filled phototube red sensitive
- Gas-filled phototube spectral S response
- Gas-filled radiation detector
- Gas-filled rectifier
- Gas-filled regulator
- Gas-filled tetrode thyratron
- Gas-filled thyratron
- Gas-filled triode
- Gas-filled triode thyratron
- Gas-filled tube
- Gas-switching
- Gated-beam discriminator pentode
- Gauge
- Geiger counter
- Geiger counter tube
- Geiger Müller
- Geiger-Müller counter tube
- Geissler
- General-purpose triode pentode
- Germanium
- Glass beam power tetrode
- Glass beam tetrode
- Glass envelope
- Glass envelope planar tube
- Glass power pentode
- Glass radial-beam pentode
- Glass radial-beam power pentode
- Glass VHF beam power tetrode
- Glass-metal envelope with disc
- Glow
- Glow lamps
- Glow modulator
- Glow modulator tube
- Glowing anode
- Glow-tube regulator
- GM tube
- Gnome tube
- Goliath base
- Graphic indicator numerical indicator
- Grid leak detector
- Grid-controlled
- Gridded
- Grid-leak detector
- Gridless oscillator
- Guitar amplifier
- Gyro klystron
- Gyro traveling wave
- Gyro twystrons
- Gyrotron
- Gyrotron backward wave oscillator
- Half-indirectly heated hydrogen triode thyratrons
- half-indirectly heated tube
- Half-wave
- Half-wave gas rectifier
- Half-wave mercury-vapor rectifier
- Half-Wave Rectifier
- Half-wave rectifier miniature
- Ham radio
- Hard modulator
- Hard switching tube
- Hearing aid
- Heat exchanger
- Heater
- Heater cathode type medium-mu triode
- Heater power rating
- Heater rating
- Heater supply
- Heater voltage
- Heil oscillators
- Heil tube
- Helical
- Helix or other integral cooler
- Helix traveling-wave tube
- Heptode
- Heptode mixer
- Heptode with a passivated third grid
- Hexode
- Hexode receiving VHF
- Hexode/heptode and triode
- High frequency diode
- High frequency diode with indirectly heated cathode
- High frequency tube
- High Gm power pentode
- High peak
- High resolution
- High slope
- High vacuum
- High vacuum electro-optical devices
- High vacuum rectifier
- High voltage beam triode
- High voltage meter
- High voltage shunt regulator
- High-efficiency oxide coated filamentary cathode
- Higher conversion transconductance
- High-frequency triode
- High-impedance signal triode
- High-mu dual triode
- High-mu power triode
- High-mu triode
- High-mu triode dual detector diode
- High-mu twin triode
- High-mu UHF triode
- High-powered beam tetrode
- High-rel
- High-rel full-wave rectifier
- High-rel tube
- High-rel variant
- High-speed circuit switching
- High-speed MHz counter
- High-vacuum
- High-vacuum full-wave rectifier
- High-vacuum half-wave rectifier
- High-voltage rectifier diode
- Hi-mu triode octal base
- Hi-rel
- Home radio set
- Horizontal Deflection Output tube
- Horizontal-deflection amplifier
- Horizontal-output transformer
- Hot cathode
- Hot cathode air-cooled rectifier valves
- Hot cathode air-cooled x-ray
- Hot cathode gas diode
- Hot cathode oil-immersed tube
- Hot-wire thermal relays
- HV rectifier
- Hydrogen filling
- Hydrogen thyratron
- Hydrogen thyratron tetrode
- Hydrogen thyratron triode ceramic
- hydrogen thyratrons
- IF
- IF amplifier
- IF amplification stage
- IF amplifier
- IF stage
- Iconoscope
- Ignition
- Ignition voltage
- Ignitron
- Image converter
- Image intensifier or image converter
- Image orthicon
- Image orthicon TV camera tube
- Image storage tube
- Image vidicon
- Imaging tube
- Impedance
- Impulse tube
- Increased reliability
- Indian head test pattern
- Indicator
- Indicator Tube
- Indirectly heated
- Indirectly heated argon triode thyratron negative starter
- Indirectly heated beam power tetrode with anode top cap
- Indirectly heated common cathode
- Indirectly heated common-cathode dual diode
- Indirectly heated common-cathode dual triode
- Indirectly heated common-cathode triode
- Indirectly heated double detector diode
- Indirectly heated full-wave rectifier
- Indirectly heated half-wave rectifier
- Indirectly heated heptode pentagrid converter
- Indirectly heated hexode monoscope
- Indirectly heated or unipotential cathode
- Indirectly heated oxide-coated cathode
- Indirectly heated power pentode
- Indirectly heated rectifier
- Indirectly heated RF sharp-cutoff pentode with anode top cap
- Indirectly heated RF/IF remote-cutoff pentode with anode top cap
- Indirectly heated single detector diode
- Indirectly heated triode
- Indirectly heated triode/heptode frequency mixer
- Indirectly heated tube
- Inductive output
- Inductive output amplifier
- Inductive output tube
- Inductuner
- Industrial heating
- Industrial vacuum
- Inert-gas filling
- Infrared
- Infrared detector
- Infrared image converter
- Infrared imaging device
- Injection
- Innovals
- Instrument
- Integrated control triode
- Internal oscillator grid
- Internal resistance
- Internal shield
- Internally water cooled dual tetrode
- International octal base
- Inverse voltage diode
- Ion microscope tube
- Ion propulsion tube
- Ionization gauge
- ionization vacuum-gauge tube
- IR image converter
- Iridium
- Keep-alive
- Kellog-type
- Kenotron
- Kinescope
- Kinkless tetrode
- Kinkless tetrode beam power tube
- Klystron
- Klystron linear beam
- Klystron linear beam pulse power
- Klystron reflex
- Klystron reflex electronically tuned
- Klystron reflex external cavity
- Klystron reflex integral cavity
- Klystron reflex L-band
- Klystron tube
- KV
- Lead-acid battery
- Lead-acid cells
- Leak detector
- Leclanché cell
- Light source
- Lighthouse tube
- Lighthouse-type disk-seal UHF planar transmitting triode
- Line output pentode
- Line power amplifier
- Linear
- Linear beam klystron
- Liquid cooled
- Local oscillator
- Local oscillator/mixer
- Lock seam
- Loctal
- Loctal base
- Loctal Lorenz
- Logic gate
- Loktal
- Long-life amplifier tube
- Low emission
- Low impedance
- Low microphonics susceptibility
- Low noise susceptibility
- Low power output
- Low-impedance signal triode
- Low-microphonic military triode
- Low-mu high-frequency triode pin
- Low-mu triode
- Low-noise AF pentode
- Low-power filament
- Low-power rectifier
- Low-power tetrode thyratrons
- Low-power triode thyratrons
- Low-voltage
- Low-voltage/low power filament heater
- Luminance
- Luminiscent tetrode thyratrons
- Magic Eye
- Magic Eye cathode ray tuning indicator
- Magic Eye Tuning indicator
- Magic Eye Tuning indicator with triode
- Magic tuning eye
- Magnesium
- Magnet
- Magnetic deflection
- Magnetic field CRT sensor
- Magnetic field sensor
- Magnetic focus
- Magnetic tape recorder
- Magnetically controlled diode
- Magnetron oven
- Magnetron pulse
- Magnetron tube
- Magnetron tunable
- Maser
- Measurement equipment
- Measuring diode
- Measuring electrometer pentode
- Measuring electrometer tetrode
- Measuring electrometer triode
- Mechano-electronic transducer
- Medical X-ray
- Medium-mu dual triode
- Medium-mu high-frequency triode
- Medium-mu triode
- Medium-mu triode / sharp-cutoff pentode
- Medium-mu triode dual detector diode
- Medium-mu twin triode
- Memory display tube
- Memotron storage CRT
- Mercury arc rectifier
- Mercury displacement contactor
- Mercury relay
- Mercury switch
- Mercury thyratron external trigger
- Mercury vapor
- Mercury-vapor rectifier
- Mercury-vapor triode thyratron
- Metal envelope
- Metal envelope tube
- Metal-ceramic envelope
- MHz noise source
- Mica spacers
- Microminiature
- Microphone preamplifier
- Microphonics
- Micropup
- Micropup triode conduction cooled
- Micropup tube
- Micropup UHF triode CV
- Micropup VHF triode
- Microscale vacuum
- Microwave
- Microwave amplification
- Microwave cavity reference
- Microwave diode cartridge
- Microwave indicator
- Microwave module
- Microwave oscillator
- Microwave oven
- Microwave switching tube
- Microwave systems
- Microwave tube
- Microwave velocity-modulated tube
- Milliamperes
- Millimeter-wave
- Miniature finned
- Miniature hydrogen thyratron
- Miniature pin
- Miniature pin base
- Miniature VHF Sharp-cutoff pentode
- Miniature VHF Triode
- Miniwatt
- Mixed analogue and digital display
- Mixed planar tube
- Mixer
- Mixer diode semiconductor
- Mixer heptode
- Mixer hexode
- Mixer octode
- Mobile phone
- Modulator
- Modulator tube
- Monochrome TV receiver
- Monoscope
- Monoscope tube
- M-type backward wave
- Multialkali sodium-potassium-antimony-caesium cathode
- Multi-cavity magnetron
- Multi-gun
- Multi-lumen
- Multiplier
- Multi-purpose
- Musical instrument amplifier
- MX pentagrid converter
- Naming systems
- Nano vacuum
- Nanoscale vacuum
- Near-infrared with the photocathode cooled
- Negative grid
- Negative starter voltage
- Neon
- Neon glow tuning indicator
- Neutron initiator
- Nickel cathode tube
- Night vision scope tube
- Nixie
- Nixie displays and indicators
- Nixie indicator
- Nixie tube
- No filament/heater
- Noise
- Noise diode
- Noise source
- Nominal voltage
- Noval base
- Noval tube
- NTSC
- NTSC chroma signal demodulators
- Nuclear
- Nuvistor
- Nuvistor high-mu VHF triode
- Nuvistor RF triode
- Nuvistor Tube
- Octal
- Octal base
- Octal version
- Octode
- Octode pentagrid converter
- Oil immersion
- Oil-can tube
- Oil-immersed rectifier valve
- Omegatron
- One starter electrode
- Optical indicator
- Optical level indicator
- Optical tuning indicator
- Opto character generator
- Opto flash tube
- Opto hollow cathode tube
- Opto light source crater
- Opto photocell
- Orithon
- Ornamental
- Oscillating
- Oscillator
- Oscillator input grid
- Oscillator section
- Oscillator triode
- O-type backward wave
- Output pentode
- Output stage
- Output tube
- Output voltage
- Oxide insulation
- Ozone
- Parallel heater
- Parallel-connected
- Parallel-string
- Particle accelerator
- Passive components:
- Peak
- Peak inverse voltage
- Peanut
- Pencil tube
- Penning vacuum sensor
- Pentagrid
- Pentagrid converter
- Pentagrid converter pin
- Pentode
- Pentode or beam power tetrode
- Pentode receiving VHF
- Pentode RFIF amplifier
- Pentode transmitting
- Pentode VHF
- Pentode VHF acorn
- Pentode VHF mushroom
- Pentode video amplifier
- Pentode-triode style pentagrid converter
- Permeation
- Phanotron
- Phanotron-gas diode
- Phasitron
- Phasitron FM modulator
- Phosphor
- Photocathode
- Photocell
- Photodiode
- Photometric cell
- Photomultiplier
- Photomultiplier spectral S response
- Photoresistor
- Photosensitive
- Phototube
- Photovoltaic
- Pigtail
- Pigtailed
- Pin noval base
- Pinch-type construction
- Pirani vacuum gauge
- Pitot
- Pixie
- Pixie display
- Planar triode rocket style
- Plasma
- Plasma display panel
- Plasma heating
- Plasma panel display
- Plasma propulsion systems
- Plasmatron
- Plastic base
- Plated
- Platinotron
- Platinum
- Pliotron
- Portable radio
- Power
- Power amplifier
- Power output beam tetrode
- Power output pentode
- Power output triode
- Power pentode
- Power pentode miniature base
- Power rectifier
- Power regulator
- Power tetrode
- Power tetrode oil-cooled
- Power tetrode pulse rated
- Power triode
- Power triode audio amplifier
- Power triode for high voltage pulse operation
- Power triode forced-air-cooled
- Power triode shielded grid
- Power twin triode
- Precision bore glass
- Precision bore quartz
- Prescaler
- Primer electrode
- Professional tube system
- Projection CRT
- Projection kinescope
- Proportional counter tube
- Protection tube thermistor
- Protective gap
- Protective spark gap
- Proximity detector
- PTO
- Pulse
- Pulse modspark gap modulator
- Pulse modulator
- Pulse modulator tube
- Pulse rated
- Pulsed mode
- Pulsed oscillator
- Pulsed RF power
- Pulsed transmitting tube
- Push-pull Class-A circuit
- Push-pull class-AB circuit
- Push-pull output
- Pyrometallurgical electrolytic chemical reaction
- Pyrometer
- Quadrature detector
- Quartz
- Quartz condensing
- Quartz crystal
- Quartz window
- RF
- RF Pentode
- RF amplifier
- RF amplifier/mixer
- Radar
- Radar display tube
- Radar dual channel oscilloscopes
- Radar modulator
- Radar phantastron circuit
- Radar pulser
- Radar Specific Tube
- Radar systems
- Radar-fuse
- Radiation
- Radiation counter
- Radiation counter tube
- Radiation sensors nuclear
- Radiation sensors visible IR UV
- Radiation sources
- Radiation-cooled transmitting triode
- Radio amateur
- Radio detector
- Radio frequency heating
- Radio receiver
- Radio set
- Radio station
- Radioactively primed
- Radiosonde
- Random value
- Raysistor
- Readout
- Readout digital indicator
- Receiver input
- Receiver vacuum tube
- Receiving
- Receiving tube
- Rectification
- Rectifier
- Rectifier cold cathode
- Rectifier CV
- Rectifier diode
- Rectifier half-wave
- Rectifier mercury full-wave
- Rectifier vacuum
- Rectifier x-ray
- Rectifier, grid-controlled
- Rectifying tube
- Reel-to-reel
- Reflective-mode photocathode
- Reflex circuit
- Reflex klystron
- Reflex klystron S-band
- Reflex oscillator
- Reflex radios
- Refractory
- Register digital indicator
- Regulator
- Relay
- Relay / switch
- Relay tetrode
- Relay thermal delay
- Relay triode
- Remote-cutoff
- Remote-cutoff RF Pentode
- Remote-cutoff control grid
- Remote-cutoff pentode
- Remote-cutoff pentode dual detector diode
- Remote-cutoff pentode dual diode
- Remote-cutoff pentode medium-mu triode
- Remote-cutoff RF pentode
- Remote-cutoff RF pentode
- Remote-cutoff tetrode
- Repeater
- Resettable counter
- Resistive dummy load
- Resistive element
- Resonance
- Resonant cavity
- Resonant vacuum cavities
- Resonator
- Restrictor
- Reticule
- RF amplifier
- RF indicator
- RF Mixer
- RF pentode
- RF pentode and dual diode
- RF pentode FL
- RF power
- RF power triode
- RF power triode water-cooled
- RF triode
- RFIF amplifiers
- Rhenium
- Rhumbatron
- Round wire-ended pencil tube
- Ruggedized
- S-band Magnetrons
- S-band reflex Klystron
- S-band strapped magnetron
- Scintillation counter
- Screen grid HF amplifier
- Screen-grid tetrode
- Secondary emission
- Secondary emission amplifier
- Secondary emission cathode
- Secondary emission tube
- Secondary emission VHF amplifier
- Secondary-emission VHF pentode
- Semiconductor vacuum electronic systems
- Semiremote-cutoff RF Pentode
- Semiremote-cutoff pentode
- Semiremote-cutoff pentode dual detector diode
- Sensor
- Sensor mass-spectrometry
- Sensor radiation
- Sensor radiation Geiger counter
- Sensor vacuum thermocouple
- Separate-cathode
- Series heater
- Series regulator
- Series-string
- Servo system
- Sharp-cutoff
- Sharp-cutoff RF pentode
- Sharp-cutoff dual control pentode for computer service
- Sharp-cutoff dual tetrode
- Sharp-cutoff IF/video pentode
- Sharp-cutoff pentode
- Sharp-cutoff RF Pentode
- Sharp-cutoff RF pentode miniature base
- Sharp-cutoff tetrode
- SHF
- Shield pin
- Shielded pentode
- Shielded Trigger pentode
- Shield-grid tetrode thyratrons
- Shock
- Short-circuit
- Shortwave
- Shortwave bands
- Shouldered glass
- Shouldered glass envelope
- Shouldered octal
- Shouldered tubular bulb
- Shunt regulator
- Signal
- Signal amplifier
- Signal diode
- Signal generator
- Signal pentode
- Signal processing tube
- Signal tetrode
- Signal triode
- Signal triode gain
- Signal tube
- Silica envelope
- Silica tube
- Silicone
- Single detector diode
- Single element
- Single pair electrostatic deflection
- Single-cavity klystron
- Single-ended
- Single-ended Class-A circuit
- Slow wave device
- Small gas tetrode thyratron
- Small gas triode thyratron
- Solar collector
- Solenoid
- Solid anode magnetron
- Sonar
- Space discharge tube
- Space-charge-grid tetrode
- Spacer
- Spark gap
- Spark gap pulse modulator
- Special cathode processing
- Special oscillator section
- Special purpose heptode
- Spectral response
- Spectrum analysis
- Spectrum analyzer
- Spigot
- Split anode TV sync separator
- Split triode-pentode
- Split-anode magnetron
- Stabilisator
- Stabilotron
- Stage
- Stage count
- Stage photomultiplier
- Starter electrode
- Storage deflection control tube
- Storage radial beam tube
- STransmission-mode
- Strobe light
- stroboscope lamp
- Strobotron
- Subminiature directly heated power pentode
- Subminiature tube
- Super high power generated electron tube
- Superheater
- Superheterodyne
- Superheterodyne mixer
- Superheterodyne Pentagrid converter
- Super-high frequency
- Suppressor grid
- Surge arrester
- Surge arrester gas
- Sweep generator
- Switch
- Switch vacuum relay
- Switching mode
- Sync separation
- TV turret tuner
- Telecom pentode
- Telephone repeater
- Television camera
- Television picture tube
- Television tube
- Television tube video amplifier
- Temperature limited diode
- Terminal
- Tesla receiving tube
- Tetrode
- Tetrode beam power
- Tetrode beam power radar modulator
- Tetrode beam transmitting
- Tetrode electrometer
- Tetrode mixer
- Tetrode power VHF
- Tetrode pulse modulator
- Tetrode transmitting
- Tetrode transmitting power
- T-Gauge
- Thermal delay device
- Thermionic converter
- Thermionic relay
- Thermionic valve
- Thermistor protection
- Thermocouple
- Thermocouple protection
- Thermocouple vacuum-gauge tube
- Three-anode sharp-cutoff tetrode
- Three-cavity electrostatically focused klystron
- Three-phase
- Thyratron
- Thyratron hydrogen modulator
- Thyratron radar modulator
- Thyratron subminiature
- Thyratron tetrode
- Thyratron Xenon
- Top cap
- Top-cap connection
- TR
- TR cell
- TR L-band
- TR switch
- TR switch microwave
- TR switch X-band
- TR Trigger triode one starter electrode only
- TR tube
- Transconductance
- Transconductance radios
- Transducer
- Transformer
- Transformer-coupled audio driver
- Transmit/receive
- Transmit-receive
- Transmitter receiver front end
- Transmitters
- Transmitting
- Transmitting or industrial single or dual triode
- Transmitting pentode
- Transmitting tetrode
- Transmitting triode
- Transmitting triode forced-air cooled
- Transmitting triode indirectly heated plus dual top cap for grid and anode
- Transmitting triode ‘silica valve’
- Transmitting triode UHF
- Transmitting triode water-cooled
- Transmitting tube
- Transmitting tube forced-air
- Transmitting tube water cooled
- Transverse magnetic field
- Traveling wave
- Traveling wave tube
- Traveling-wave magnetron
- Traveling-wave tube
- Trigatron
- Trigatron modulator
- Trigger pentode
- Trigger tetrode
- Trigger tube
- Triode
- Triode air cooled
- Triode amplification factor
- Triode amplifier
- Triode amplifier peanut
- Triode external anode
- Triode gas thyratrons
- Triode grid
- Triode industrial RF generator
- Triode micropup
- triode nuvistor
- Triode pentode
- Triode planar
- Triode power
- Triode power audio amplifier
- Triode power dual
- Triode power RF heating
- Triode pulse modulator
- Triode radar modulator
- Triode receiving gas
- Triode shunt regulator
- Triode transmitting
- Triode transmitting micropup
- Triode transmitting power
- Triode transmitting silica
- Triode UHF
- Triode UHF acorn
- Triode UHF acorn CV
- Triode UHF cermet
- Triode UHF disk seal
- Triode UHF doorknob
- Triode UHF dual cap
- Triode UHF lighthouse
- Triode UHF pencil
- Triode UHF power
- Triode UHF power cermet
- Triode UHF rocket
- Triode UHF stacked electrodes
- Triode UHF transmit
- Triode UHF xmit
- Triode UHF xmit disc-sealed
- Triode UHF xmit doorknob
- Triode UHF xmit HE
- Triode UHF xmit micropup
- Triode UHF xmit oil-can
- Triode UHF xmit planar
- Triode UHF xmit pulse
- Triode UHF xmit pulse coaxial
- Triode UHF xmit pulse micropup
- Triode UHF xmit pulse oil-can
- Triode UHF xmitpulse
- Triode UHFSHF cermet
- Triode UHFSHF cermet module
- Triode VHF dual cap
- Triode VHF power
- Triode VHF transmitting (VT)
- Triode VHF xmit micropup
- Triode VHF xmit pulse micropup
- Triode xmit air cooled
- Triode xmit power
- Triode xmit water-cooled
- Triode/heptode mixer
- Triode/hexode frequency converter
- Triode/hexode frequency-changer
- Triode/hexode mixer
- Triode-heptode
- Triode-heptode converter
- Triode-heptode local oscillator-mixer
- Triode-hexode
- Triode-hexode local oscillator/mixer
- Triode-hexode mixer
- Triode-pentode combination
- Triode-pentode converter
- Triple diode high-mu triode
- Triple triode compactron preamplifier
- Trochotron
- Trochotron beam switch noise source
- Trochotron beam-switching tube
- Trochotron noise source
- Tube base
- Tube checker
- Tube socket
- Tube tester set
- Tunable microwave
- Tunable voltage
- Tuned RF amplifier
- Tuned RF pre-amplifier stage
- Tungsten
- Tuning circuit
- Tuning fork oscillators
- Tuning indicator
- Tuning-eye tube
- Tunnel diode
- TV damper/efficiency diode
- TV IF
- TV line output beam power tetrode
- TV magnetic-deflection horizontal-output stage
- TV receiver
- TV station
- TV test
- TV tuner
- TV UHF converter
- TV UHF tuner
- TV vertical output
- Twin electrometer tetrode
- Twin power triode
- Twin tetrode transmitting
- Twin triode common cathode
- Twin triode DC amplifier
- Twin triode frequency divider
- Twin triode servo amplifier
- Twin triode VHF amplifier
- Twin-input triode
- Twin-tetrode beam power VHF
- Twin-triode power amplifier
- Two-cavity klystron
- Two-element device
- TWT
- TWT Amplifier
- TWT amplifier GHz
- TWT BWO
- TWT carcinotron
- TWT helix couplers
- TWT Lorenz
- TWT low-noise
- TWT power
- UHF
- UHF cermet transmitting tetrode
- UHF cermet triode low-noise amplifier
- UHF medium-mu triode
- UHF oscillator
- UHF pencil triode
- UHF power tetrode
- UHF receiving pentode
- UHF Transmitting Triode
- UHF triode
- UHF triode NR
- UHF triode oscillator
- UHF tube
- UHF Xmit module
- UHFSHF diode
- Ultra high power generated electron tube
- Ultra-high frequency
- Under-chassis connection
- Unijunction device
- UV flame detector
- UV photomultiplier
- V dual triode
- VHF
- VHF receiver front end
- VHF Triode
- Vacuum capacitor
- Vacuum channel transistor
- Vacuum diode
- Vacuum electron device
- Vacuum full-wave rectifier
- Vacuum glow discharge
- Vacuum half-wave rectifier
- Vacuum ionization gauge
- Vacuum magnetic field mass
- Vacuum magnetic field vibration
- Vacuum panel display
- Vacuum pentodes
- Vacuum phototube
- Vacuum phototube specific-color sensitive
- Vacuum phototube spectral S response
- Vacuum relay wcoil
- Vacuum sensor
- Vacuum SPDT switch
- Vacuum switch
- Vacuum tetrode
- Vacuum triode
- Vacuum triode shielded
- Vacuum tube analog oscilloscope
- Vacuum tube distributed amplifier
- Vacuum tube generator
- Vacuum tube volt meter
- Vacuum tube with secondary emission
- Vacuum-fluorescent-display
- Valve
- Valve cathode ray
- Vapor cooled
- Variable filament resistor
- Variable transconductance
- Variable-mu / remote-cutoff pentode
- Vari-mu RF pentode
- Vari-mu tetrode
- Varistor
- Velocity modulated tube
- Vertical deflection output tube
- Vertical output
- Vertical Output Pentode
- Very-high power tube
- VHF dual triode
- VHF RF triode
- VHF sharp-cutoff RF tetrode
- VHF Transmitting triode
- VHF TV transmitter
- VHF/RF triode
- Vibrating capacitor
- Vibration
- Vibrotron
- Video IF circuit
- Video IF amplifier
- Video image converter IR
- Video image orthicon
- Video pentode
- Video signal
- Vidicon
- Viewfinder tube
- Vircator
- Virtual cathode
- VM tube
- Volt
- Volt heater
- Volt heater/filament tube
- Voltage gradient
- Voltage reference
- Voltage reference tube
- voltage regulation
- Voltage regulator
- Voltage stabilizer
- Voltage tunable
- Voltage tuned magnetron
- Voltage-regulator
- Water cooled
- Water vapor discharge tube
- Water-cooled power triode
- Water-cooled transmitting triode
- Water-cooled triode
- Watt
- Wheatstone bridge
- White noise
- X-band magnetron
- X-band power amplifier
- X-band reflex klystron
- Xenon half wave rectifier
- X-ray generator
- X-ray image intensifier
- X-ray tube
- Zero anode power