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.

  1. AF
  2. AF amplifier
  3. Absorption
  4. AC bridge
  5. AC mains
  6. AC transformer
  7. AC/DC
  8. AC/DC series heater
  9. Accelerator
  10. Acorn
  11. Acorn glass envelope
  12. Acorn UHF triode
  13. AF amplifier
  14. AF modulator
  15. AF Power pentode
  16. AF RF oscillator
  17. Air-cooled
  18. All-glass
  19. All-glass miniature
  20. All-glass valves fitted with (BG) bases
  21. All-glass VHF/UHF power
  22. All-metal tube
  23. AM detector
  24. AM detector diode
  25. AM EF Z Sharp-cutoff RF pentode
  26. AM/FM
  27. Ampex video recorder
  28. Amplification
  29. Amplification factor
  30. Amplifier
  31. Amplifier submarine repeaters
  32. Amplifier telegraphy
  33. Amplifier tube
  34. Amplifiers instrumentation
  35. Analog
  36. Analog color TV receiver
  37. Anode
  38. Anode dissipation
  39. Anode voltage
  40. Anode voltage rectifier
  41. Anodyne anode-dynode beam-deflection amplifier
  42. Anti-transmit/receive cell
  43. Anti-transmit-receive
  44. Arcing
  45. Argon-filled full-wave gas rectifier
  46. Atomic clock
  47. ATR
  48. ATR cell
  49. ATR switch
  50. ATR switch microwave
  51. Audio amplifier
  52. Audio beam tetrode
  53. Audio output
  54. Audio output beam power tetrode
  55. Audio output pentode
  56. Audio output tube
  57. Audio Pentode
  58. Audio power amplifier
  59. Audio power output pentode
  60. Audio power pentode
  61. Audio preamplifier
  62. Audio test
  63. Audio triode pentode
  64. Audio TV vertical output
  65. Audion
  66. Audiophile
  67. Audiotron
  68. Autonomous cathode
  69. AVC
  70. AVC bias
  71. AVC rectifier
  72. Average
  73. Backward wave
  74. Backward wave oscillator
  75. Backward-wave amplifier
  76. Ballast tube
  77. Band
  78. Barometer
  79. Barretter
  80. Barretter photoresistor
  81. Battery
  82. Battery radio
  83. Battery types
  84. Bayard-Alpert ion vacuum gauge
  85. Bayard-Alpert ionization gauge
  86. Beam deflection tube
  87. Beam power
  88. Beam power amplifier
  89. Beam power pentode
  90. Beam power receiving tube
  91. Beam power tetrode
  92. Beam power transmitting tube
  93. Beam power tube
  94. Beam switch counter
  95. Beam switch counting
  96. Beam switch device
  97. Beam switch selector -stage
  98. Beam switch wide-band noise source
  99. Beam switch
  100. Beam switching
  101. Beam tetrode
  102. Beam tetrode anode cap
  103. Beam-deflection heptode
  104. Beam-power pentode
  105. Beam-switch demultiplexer
  106. Beam-switch pulse generator
  107. Beam-switching tube
  108. BG base
  109. Bidecal
  110. Bidirectional counter
  111. Bigrid amplifier
  112. Bimetal
  113. Binary adder tube
  114. Binary counter
  115. Binary indicator
  116. Binary switching tube
  117. Blemish standard
  118. Bluetooth
  119. Bolometer
  120. Borrow cathode
  121. Bourdon gage
  122. Braun tube
  123. Braun-Ryan tube
  124. British pin base
  125. Broadband power pentode
  126. Broadband spectrophotometer
  127. Broadcast
  128. Bulb
  129. Button
  130. BWO
  131. Cable
  132. Cables
  133. Caesium-antimony cathode
  134. Caesium-on-oxidated-silver cathode
  135. Camera tube
  136. Camera tube image converter
  137. Capillary
  138. Car radio tubes
  139. Carbon
  140. Carry cathode
  141. Cartridge diode
  142. Cascade
  143. Cascading
  144. Cascode circuit
  145. Cassette
  146. Cathode follower
  147. Cathode heated by electron bombardment
  148. Cathode heated by ion bombardment
  149. Cathode potential
  150. Cathode ray
  151. Cathode ray charge storage tube
  152. Cathode ray tube
  153. Cathode ray tube, oscilloscope
  154. Cathode ray tube, radar indicator
  155. Cathode ray tube, television
  156. Cathode subminiature
  157. Cathode-coupled flip-flop
  158. Cathode-ray charge storage
  159. Cathode-ray discharge
  160. Cathode-ray display
  161. Cat’s-eye
  162. Cavity
  163. Cell Q-band
  164. Ceramic
  165. Ceramic envelope
  166. Ceramic radial-beam pentode forced air cooled
  167. Ceramic tetrode
  168. Ceramic tetrode forced-air cooled
  169. Ceramic triode forced air cooled
  170. Ceramic triode water cooled
  171. Ceramic UHF triode forced-air cooled
  172. Cermet microwave triode
  173. Character generating cathode ray tube
  174. Chronotron
  175. Civil Defense
  176. Class-A
  177. Class-A audio driver
  178. Class-B
  179. Class-B power output
  180. Class-C
  181. Class-C oscillator/amplifier
  182. Class-C transmitter oscillator/amplifier
  183. Classifications for bases
  184. Classifications for connection methods
  185. Classifications for pin counts
  186. Classifications for the number of electrodes:
  187. Classifications of active elements in tubes
  188. Clipperrectifier
  189. CM-band
  190. Coaxial
  191. Coaxial power triode
  192. Code
  193. Coil vacuum sealed
  194. Cold cathode
  195. Cold cathode character display tube
  196. Cold cathode counter display tube
  197. Cold cathode Crookes tube
  198. Cold cathode fluorescent lamp
  199. Cold cathode gas diode
  200. Cold cathode indicator tube
  201. Cold cathode ion x-ray tube
  202. Cold cathode rectifier valve
  203. Cold cathode trigger
  204. Cold-cathode Nuvistor
  205. Cold-cathode SQ tube
  206. Cold-cathode tube
  207. Cold-cathode water vapor discharge tube
  208. Color TV receiver
  209. Combined diode-pentode
  210. Combined triode-diode
  211. Combined triode-hexode triode-heptode
  212. Combined triode-octode
  213. Combined triode-pentode
  214. Combustion
  215. Common-cathode counter
  216. Common-cathode pair
  217. Compactron
  218. Compactron dual triode
  219. Compactron high-mu dual diode
  220. Compactron high-mu dual triode
  221. Compactron high-mu triple triode
  222. Compactron pentode
  223. Compactron Triple triode
  224. Complex wave generator
  225. Component
  226. Composite
  227. Computer counter trigger
  228. Computer counter triode gas
  229. Computer monitor
  230. Computer rated
  231. Computer tube
  232. Condenser
  233. Conduction cooled
  234. Conductive coating
  235. Conelrad
  236. Console radio
  237. Contact potentials
  238. Continuous wave
  239. Continuously transmitting tube
  240. Control grid
  241. Controllable gas diode
  242. Conversion mixer
  243. Conversion oscillator
  244. Converter
  245. Cooled anode transmitter
  246. Coolidge tube
  247. Co-planar triode
  248. Corona discharge tube
  249. Corona high-voltage regulator
  250. Corona voltage regulator
  251. Counter
  252. Counter / selector
  253. Counter tube
  254. Counter/selector
  255. Counter/timer
  256. Counting indicator
  257. Counting tube
  258. Cross field amplifier
  259. Crossed-field amplifier
  260. CRT
  261. CRT digital mass memories
  262. CRT dual gun
  263. CRT indicator
  264. CRT lock-in base
  265. CRT oscilloscope
  266. CRT oscilloscope distributed deflection
  267. CRT oscilloscope dual beam
  268. CRT radar magnetic deflection
  269. CRT ruggedized
  270. Crystal rectifiers
  271. Current
  272. Current limited diodes
  273. Current limited diodes noise generator
  274. Current regulator
  275. Current stabilizers
  276. Custom triode
  277. Customized heater
  278. CV Power triode
  279. Cyclotron
  280. Cyclotron resonance maser
  281. Cylindrical glass
  282. Cylindrical glass envelope
  283. Cylindrical octal
  284. Damper diode
  285. Damper/efficiency diode
  286. Dark current
  287. DC current
  288. DC filament
  289. DC-coupled power triode
  290. Decade counter
  291. Deflection amplifier
  292. Deflection screen
  293. Dekatron
  294. Delay line
  295. Detector
  296. Detector diode
  297. Detectors
  298. Dielectric
  299. Digital indicator
  300. Diheptal
  301. Diode
  302. Diode damper HV
  303. Diode detector
  304. Diode noise generator
  305. Diode pentode
  306. Diode plates
  307. Diode rectifier
  308. Diode rectifier clipper
  309. Diode rectifier full wave
  310. Diode rectifier mercury
  311. Diode sharp-cutoff pentode
  312. Diode UHF
  313. Diode UHF micropup
  314. Diode UHF pencil
  315. Diode UHF power oil-can
  316. Diode UHF TR switch
  317. Diode voltage reference
  318. Diodes
  319. Dip
  320. Directly heated
  321. Directly heated beam power tetrode
  322. Directly heated dual AF (push-pull) power pentode
  323. Directly heated high-mu triode
  324. Directly heated low-mu RF triode
  325. Directly heated oxide-coated filament
  326. Directly heated power triode
  327. Directly heated remote-cutoff RF tetrode
  328. Directly heated RF power pentode
  329. Directly heated sharp-cutoff RF tetrodebase
  330. Directly heated thoriated tungsten filament
  331. Directly heated triode-heptode mixer
  332. Directly heated tungsten filament
  333. Discharge
  334. Disc-seal construction
  335. Disk-seal planar UHF power triode
  336. Displacement sensor
  337. Displacement vibration sensors
  338. Display
  339. Display cathode count
  340. Display/Indicator
  341. Distortion
  342. Doherty configuration
  343. Door-knob tube
  344. Double diode
  345. Double electrostatic deflection
  346. Double pentode
  347. Double tetrode
  348. Double triode
  349. Double-diode high-mu triode
  350. Double-diode semiremote-cutoff pentodes
  351. Double-diode sharp-cutoff pentode
  352. Drawn
  353. Driver
  354. Driver triode
  355. Dry-cell
  356. Dual anode top cap
  357. Dual audio and RF triode
  358. Dual beam amplifier low voltage
  359. Dual beam power tube
  360. Dual class-b power triode
  361. Dual detector diode
  362. Dual detector diode medium-mu triode
  363. Dual diode
  364. Dual diode and remote-cutoff pentode
  365. Dual diode detector
  366. Dual diode high-mu triode
  367. Dual diode high-mu triode miniature version
  368. Dual diode medium-mu triode
  369. Dual diode octal base
  370. Dual diode/high-mu triode
  371. Dual getter
  372. Dual high-mu triode
  373. Dual low-mu triode
  374. Dual medium-mu triode
  375. Dual medium-mu triode loctal version
  376. Dual pentode
  377. Dual power pentode
  378. Dual power tetrode
  379. Dual power triode
  380. Dual rectifier diode
  381. Dual RF triode
  382. Dual shielded triode indirectly heated
  383. Dual small signal diode
  384. Dual transmitting triode
  385. Dual triode
  386. Dual triode high-rel AU
  387. Dual Triode Medium g
  388. Dual Triode with internal shield
  389. Dual-anode pentode
  390. Dual-sensitivity tuning indicator
  391. Dual-tetrode-style pentagrid converter
  392. Dual-transmit-receive
  393. Duodecal
  394. Duplex
  395. Duplex diode sharp-cutoff pentode
  396. DV Medium-mu Nuvistor triode
  397. Dynamic speaker
  398. Dynatron
  399. Dynode
  400. Earthed center-tapped secondary
  401. EHF transmitter
  402. Electric arc shock
  403. Electrical discharge lamps
  404. Electrical output
  405. Electrode support
  406. Electrolytic
  407. Electromagnetic CRT
  408. Electromagnetic testing
  409. Electro-medical
  410. Electrometer
  411. Electrometer amplifier
  412. Electrometer Triode
  413. Electrometer tube
  414. Electrometer tube vacuum gauge
  415. Electron microscope
  416. Electron multiplier
  417. Electron ray indicator
  418. Electronic flash tube
  419. Electron-ray
  420. Electron-ray indicators
  421. Electrostatic
  422. Electrostatic cathode-ray
  423. Electrostatic CRT
  424. Electrostatic deflection
  425. Electrostatically controlled
  426. Encapsulation
  427. ETL computing tube
  428. Evaporator
  429. Exceptionally long service life
  430. Exode
  431. Experimentals
  432. Eye tube
  433. FM quadrature detector
  434. Fast-wave
  435. Fast-wave electron
  436. Filament
  437. Filament rating
  438. Filament tube
  439. Filament voltage
  440. Filamentary cathode
  441. Final amplifier
  442. Finebeam tube
  443. First AF stage
  444. First detector
  445. Flakeless mica spacers
  446. Flash Tube
  447. Flash tube lamps
  448. Flash-over
  449. Flat wire-ended pencil tube
  450. Flatness
  451. Fleming valve
  452. Flip-flop
  453. Flow calibration
  454. Fluorescent
  455. Fluorescent lamp
  456. Fluxing
  457. Flying-spot scanner
  458. FM discriminator
  459. FM ratio detector
  460. FM receivers
  461. FM RF amplifier
  462. FM RF converter
  463. Forced-air cooled
  464. Forced-air cooling
  465. Forward wave
  466. Four-diode bridge rectifier
  467. Free electron laser
  468. Free-air convection
  469. Frequency changer
  470. Frequency divider
  471. Frequency meter
  472. Frequency multiplier
  473. Frequency selection
  474. Full wave gas rectifier
  475. Full wave rectifier
  476. Full wave vacuum rectifier
  477. Full-wave rectifier
  478. Full-wave rectifier octal base
  479. Fully shielded
  480. Gain
  481. Gain group denotations
  482. Gamma ray detector
  483. Gas
  484. Gas diode
  485. Gas discharge
  486. Gas discharge systems
  487. Gas electron
  488. Gas laser
  489. Gas noise generator
  490. Gas pressure measuring
  491. Gas rectification
  492. Gas sampling
  493. Gas switching
  494. Gas thyratron tetrode
  495. Gas thyratron triode
  496. Gas triode
  497. Gaseous rectifier
  498. Gas-filled
  499. Gas-filled cold cathode tube
  500. Gas-filled cold-cathode
  501. Gas-filled cold-cathode transmit/receive tube
  502. Gas-filled full-wave rectifier
  503. Gas-filled half-wave rectifier
  504. Gas-filled indirectly heated tetrode thyratrons
  505. Gas-filled phototube blue sensitive
  506. Gas-filled phototube daylight sensitive
  507. Gas-filled phototube IR sensitive
  508. Gas-filled phototube red sensitive
  509. Gas-filled phototube spectral S response
  510. Gas-filled radiation detector
  511. Gas-filled rectifier
  512. Gas-filled regulator
  513. Gas-filled tetrode thyratron
  514. Gas-filled thyratron
  515. Gas-filled triode
  516. Gas-filled triode thyratron
  517. Gas-filled tube
  518. Gas-switching
  519. Gated-beam discriminator pentode
  520. Gauge
  521. Geiger counter
  522. Geiger counter tube
  523. Geiger Müller
  524. Geiger-Müller counter tube
  525. Geissler
  526. General-purpose triode pentode
  527. Germanium
  528. Glass beam power tetrode
  529. Glass beam tetrode
  530. Glass envelope
  531. Glass envelope planar tube
  532. Glass power pentode
  533. Glass radial-beam pentode
  534. Glass radial-beam power pentode
  535. Glass VHF beam power tetrode
  536. Glass-metal envelope with disc
  537. Glow
  538. Glow lamps
  539. Glow modulator
  540. Glow modulator tube
  541. Glowing anode
  542. Glow-tube regulator
  543. GM tube
  544. Gnome tube
  545. Goliath base
  546. Graphic indicator numerical indicator
  547. Grid leak detector
  548. Grid-controlled
  549. Gridded
  550. Grid-leak detector
  551. Gridless oscillator
  552. Guitar amplifier
  553. Gyro klystron
  554. Gyro traveling wave
  555. Gyro twystrons
  556. Gyrotron
  557. Gyrotron backward wave oscillator
  558. Half-indirectly heated hydrogen triode thyratrons
  559. half-indirectly heated tube
  560. Half-wave
  561. Half-wave gas rectifier
  562. Half-wave mercury-vapor rectifier
  563. Half-Wave Rectifier
  564. Half-wave rectifier miniature
  565. Ham radio
  566. Hard modulator
  567. Hard switching tube
  568. Hearing aid
  569. Heat exchanger
  570. Heater
  571. Heater cathode type medium-mu triode
  572. Heater power rating
  573. Heater rating
  574. Heater supply
  575. Heater voltage
  576. Heil oscillators
  577. Heil tube
  578. Helical
  579. Helix or other integral cooler
  580. Helix traveling-wave tube
  581. Heptode
  582. Heptode mixer
  583. Heptode with a passivated third grid
  584. Hexode
  585. Hexode receiving VHF
  586. Hexode/heptode and triode
  587. High frequency diode
  588. High frequency diode with indirectly heated cathode
  589. High frequency tube
  590. High Gm power pentode
  591. High peak
  592. High resolution
  593. High slope
  594. High vacuum
  595. High vacuum electro-optical devices
  596. High vacuum rectifier
  597. High voltage beam triode
  598. High voltage meter
  599. High voltage shunt regulator
  600. High-efficiency oxide coated filamentary cathode
  601. Higher conversion transconductance
  602. High-frequency triode
  603. High-impedance signal triode
  604. High-mu dual triode
  605. High-mu power triode
  606. High-mu triode
  607. High-mu triode dual detector diode
  608. High-mu twin triode
  609. High-mu UHF triode
  610. High-powered beam tetrode
  611. High-rel
  612. High-rel full-wave rectifier
  613. High-rel tube
  614. High-rel variant
  615. High-speed circuit switching
  616. High-speed MHz counter
  617. High-vacuum
  618. High-vacuum full-wave rectifier
  619. High-vacuum half-wave rectifier
  620. High-voltage rectifier diode
  621. Hi-mu triode octal base
  622. Hi-rel
  623. Home radio set
  624. Horizontal Deflection Output tube
  625. Horizontal-deflection amplifier
  626. Horizontal-output transformer
  627. Hot cathode
  628. Hot cathode air-cooled rectifier valves
  629. Hot cathode air-cooled x-ray
  630. Hot cathode gas diode
  631. Hot cathode oil-immersed tube
  632. Hot-wire thermal relays
  633. HV rectifier
  634. Hydrogen filling
  635. Hydrogen thyratron
  636. Hydrogen thyratron tetrode
  637. Hydrogen thyratron triode ceramic
  638. hydrogen thyratrons
  639. IF
  640. IF amplifier
  641. IF amplification stage
  642. IF amplifier
  643. IF stage
  644. Iconoscope
  645. Ignition
  646. Ignition voltage
  647. Ignitron
  648. Image converter
  649. Image intensifier or image converter
  650. Image orthicon
  651. Image orthicon TV camera tube
  652. Image storage tube
  653. Image vidicon
  654. Imaging tube
  655. Impedance
  656. Impulse tube
  657. Increased reliability
  658. Indian head test pattern
  659. Indicator
  660. Indicator Tube
  661. Indirectly heated
  662. Indirectly heated argon triode thyratron negative starter
  663. Indirectly heated beam power tetrode with anode top cap
  664. Indirectly heated common cathode
  665. Indirectly heated common-cathode dual diode
  666. Indirectly heated common-cathode dual triode
  667. Indirectly heated common-cathode triode
  668. Indirectly heated double detector diode
  669. Indirectly heated full-wave rectifier
  670. Indirectly heated half-wave rectifier
  671. Indirectly heated heptode pentagrid converter
  672. Indirectly heated hexode monoscope
  673. Indirectly heated or unipotential cathode
  674. Indirectly heated oxide-coated cathode
  675. Indirectly heated power pentode
  676. Indirectly heated rectifier
  677. Indirectly heated RF sharp-cutoff pentode with anode top cap
  678. Indirectly heated RF/IF remote-cutoff pentode with anode top cap
  679. Indirectly heated single detector diode
  680. Indirectly heated triode
  681. Indirectly heated triode/heptode frequency mixer
  682. Indirectly heated tube
  683. Inductive output
  684. Inductive output amplifier
  685. Inductive output tube
  686. Inductuner
  687. Industrial heating
  688. Industrial vacuum
  689. Inert-gas filling
  690. Infrared
  691. Infrared detector
  692. Infrared image converter
  693. Infrared imaging device
  694. Injection
  695. Innovals
  696. Instrument
  697. Integrated control triode
  698. Internal oscillator grid
  699. Internal resistance
  700. Internal shield
  701. Internally water cooled dual tetrode
  702. International octal base
  703. Inverse voltage diode
  704. Ion microscope tube
  705. Ion propulsion tube
  706. Ionization gauge
  707. ionization vacuum-gauge tube
  708. IR image converter
  709. Iridium
  710. Keep-alive
  711. Kellog-type
  712. Kenotron
  713. Kinescope
  714. Kinkless tetrode
  715. Kinkless tetrode beam power tube
  716. Klystron
  717. Klystron linear beam
  718. Klystron linear beam pulse power
  719. Klystron reflex
  720. Klystron reflex electronically tuned
  721. Klystron reflex external cavity
  722. Klystron reflex integral cavity
  723. Klystron reflex L-band
  724. Klystron tube
  725. KV
  726. Lead-acid battery
  727. Lead-acid cells
  728. Leak detector
  729. Leclanché cell
  730. Light source
  731. Lighthouse tube
  732. Lighthouse-type disk-seal UHF planar transmitting triode
  733. Line output pentode
  734. Line power amplifier
  735. Linear
  736. Linear beam klystron
  737. Liquid cooled
  738. Local oscillator
  739. Local oscillator/mixer
  740. Lock seam
  741. Loctal
  742. Loctal base
  743. Loctal Lorenz
  744. Logic gate
  745. Loktal
  746. Long-life amplifier tube
  747. Low emission
  748. Low impedance
  749. Low microphonics susceptibility
  750. Low noise susceptibility
  751. Low power output
  752. Low-impedance signal triode
  753. Low-microphonic military triode
  754. Low-mu high-frequency triode pin
  755. Low-mu triode
  756. Low-noise AF pentode
  757. Low-power filament
  758. Low-power rectifier
  759. Low-power tetrode thyratrons
  760. Low-power triode thyratrons
  761. Low-voltage
  762. Low-voltage/low power filament heater
  763. Luminance
  764. Luminiscent tetrode thyratrons
  765. Magic Eye
  766. Magic Eye cathode ray tuning indicator
  767. Magic Eye Tuning indicator
  768. Magic Eye Tuning indicator with triode
  769. Magic tuning eye
  770. Magnesium
  771. Magnet
  772. Magnetic deflection
  773. Magnetic field CRT sensor
  774. Magnetic field sensor
  775. Magnetic focus
  776. Magnetic tape recorder
  777. Magnetically controlled diode
  778. Magnetron oven
  779. Magnetron pulse
  780. Magnetron tube
  781. Magnetron tunable
  782. Maser
  783. Measurement equipment
  784. Measuring diode
  785. Measuring electrometer pentode
  786. Measuring electrometer tetrode
  787. Measuring electrometer triode
  788. Mechano-electronic transducer
  789. Medical X-ray
  790. Medium-mu dual triode
  791. Medium-mu high-frequency triode
  792. Medium-mu triode
  793. Medium-mu triode / sharp-cutoff pentode
  794. Medium-mu triode dual detector diode
  795. Medium-mu twin triode
  796. Memory display tube
  797. Memotron storage CRT
  798. Mercury arc rectifier
  799. Mercury displacement contactor
  800. Mercury relay
  801. Mercury switch
  802. Mercury thyratron external trigger
  803. Mercury vapor
  804. Mercury-vapor rectifier
  805. Mercury-vapor triode thyratron
  806. Metal envelope
  807. Metal envelope tube
  808. Metal-ceramic envelope
  809. MHz noise source
  810. Mica spacers
  811. Microminiature
  812. Microphone preamplifier
  813. Microphonics
  814. Micropup
  815. Micropup triode conduction cooled
  816. Micropup tube
  817. Micropup UHF triode CV
  818. Micropup VHF triode
  819. Microscale vacuum
  820. Microwave
  821. Microwave amplification
  822. Microwave cavity reference
  823. Microwave diode cartridge
  824. Microwave indicator
  825. Microwave module
  826. Microwave oscillator
  827. Microwave oven
  828. Microwave switching tube
  829. Microwave systems
  830. Microwave tube
  831. Microwave velocity-modulated tube
  832. Milliamperes
  833. Millimeter-wave
  834. Miniature finned
  835. Miniature hydrogen thyratron
  836. Miniature pin
  837. Miniature pin base
  838. Miniature VHF Sharp-cutoff pentode
  839. Miniature VHF Triode
  840. Miniwatt
  841. Mixed analogue and digital display
  842. Mixed planar tube
  843. Mixer
  844. Mixer diode semiconductor
  845. Mixer heptode
  846. Mixer hexode
  847. Mixer octode
  848. Mobile phone
  849. Modulator
  850. Modulator tube
  851. Monochrome TV receiver
  852. Monoscope
  853. Monoscope tube
  854. M-type backward wave
  855. Multialkali sodium-potassium-antimony-caesium cathode
  856. Multi-cavity magnetron
  857. Multi-gun
  858. Multi-lumen
  859. Multiplier
  860. Multi-purpose
  861. Musical instrument amplifier
  862. MX pentagrid converter
  863. Naming systems
  864. Nano vacuum
  865. Nanoscale vacuum
  866. Near-infrared with the photocathode cooled
  867. Negative grid
  868. Negative starter voltage
  869. Neon
  870. Neon glow tuning indicator
  871. Neutron initiator
  872. Nickel cathode tube
  873. Night vision scope tube
  874. Nixie
  875. Nixie displays and indicators
  876. Nixie indicator
  877. Nixie tube
  878. No filament/heater
  879. Noise
  880. Noise diode
  881. Noise source
  882. Nominal voltage
  883. Noval base
  884. Noval tube
  885. NTSC
  886. NTSC chroma signal demodulators
  887. Nuclear
  888. Nuvistor
  889. Nuvistor high-mu VHF triode
  890. Nuvistor RF triode
  891. Nuvistor Tube
  892. Octal
  893. Octal base
  894. Octal version
  895. Octode
  896. Octode pentagrid converter
  897. Oil immersion
  898. Oil-can tube
  899. Oil-immersed rectifier valve
  900. Omegatron
  901. One starter electrode
  902. Optical indicator
  903. Optical level indicator
  904. Optical tuning indicator
  905. Opto character generator
  906. Opto flash tube
  907. Opto hollow cathode tube
  908. Opto light source crater
  909. Opto photocell
  910. Orithon
  911. Ornamental
  912. Oscillating
  913. Oscillator
  914. Oscillator input grid
  915. Oscillator section
  916. Oscillator triode
  917. O-type backward wave
  918. Output pentode
  919. Output stage
  920. Output tube
  921. Output voltage
  922. Oxide insulation
  923. Ozone
  924. Parallel heater
  925. Parallel-connected
  926. Parallel-string
  927. Particle accelerator
  928. Passive components:
  929. Peak
  930. Peak inverse voltage
  931. Peanut
  932. Pencil tube
  933. Penning vacuum sensor
  934. Pentagrid
  935. Pentagrid converter
  936. Pentagrid converter pin
  937. Pentode
  938. Pentode or beam power tetrode
  939. Pentode receiving VHF
  940. Pentode RFIF amplifier
  941. Pentode transmitting
  942. Pentode VHF
  943. Pentode VHF acorn
  944. Pentode VHF mushroom
  945. Pentode video amplifier
  946. Pentode-triode style pentagrid converter
  947. Permeation
  948. Phanotron
  949. Phanotron-gas diode
  950. Phasitron
  951. Phasitron FM modulator
  952. Phosphor
  953. Photocathode
  954. Photocell
  955. Photodiode
  956. Photometric cell
  957. Photomultiplier
  958. Photomultiplier spectral S response
  959. Photoresistor
  960. Photosensitive
  961. Phototube
  962. Photovoltaic
  963. Pigtail
  964. Pigtailed
  965. Pin noval base
  966. Pinch-type construction
  967. Pirani vacuum gauge
  968. Pitot
  969. Pixie
  970. Pixie display
  971. Planar triode rocket style
  972. Plasma
  973. Plasma display panel
  974. Plasma heating
  975. Plasma panel display
  976. Plasma propulsion systems
  977. Plasmatron
  978. Plastic base
  979. Plated
  980. Platinotron
  981. Platinum
  982. Pliotron
  983. Portable radio
  984. Power
  985. Power amplifier
  986. Power output beam tetrode
  987. Power output pentode
  988. Power output triode
  989. Power pentode
  990. Power pentode miniature base
  991. Power rectifier
  992. Power regulator
  993. Power tetrode
  994. Power tetrode oil-cooled
  995. Power tetrode pulse rated
  996. Power triode
  997. Power triode audio amplifier
  998. Power triode for high voltage pulse operation
  999. Power triode forced-air-cooled
  1000. Power triode shielded grid
  1001. Power twin triode
  1002. Precision bore glass
  1003. Precision bore quartz
  1004. Prescaler
  1005. Primer electrode
  1006. Professional tube system
  1007. Projection CRT
  1008. Projection kinescope
  1009. Proportional counter tube
  1010. Protection tube thermistor
  1011. Protective gap
  1012. Protective spark gap
  1013. Proximity detector
  1014. PTO
  1015. Pulse
  1016. Pulse modspark gap modulator
  1017. Pulse modulator
  1018. Pulse modulator tube
  1019. Pulse rated
  1020. Pulsed mode
  1021. Pulsed oscillator
  1022. Pulsed RF power
  1023. Pulsed transmitting tube
  1024. Push-pull Class-A circuit
  1025. Push-pull class-AB circuit
  1026. Push-pull output
  1027. Pyrometallurgical electrolytic chemical reaction
  1028. Pyrometer
  1029. Quadrature detector
  1030. Quartz
  1031. Quartz condensing
  1032. Quartz crystal
  1033. Quartz window
  1034. RF
  1035. RF Pentode
  1036. RF amplifier
  1037. RF amplifier/mixer
  1038. Radar
  1039. Radar display tube
  1040. Radar dual channel oscilloscopes
  1041. Radar modulator
  1042. Radar phantastron circuit
  1043. Radar pulser
  1044. Radar Specific Tube
  1045. Radar systems
  1046. Radar-fuse
  1047. Radiation
  1048. Radiation counter
  1049. Radiation counter tube
  1050. Radiation sensors nuclear
  1051. Radiation sensors visible IR UV
  1052. Radiation sources
  1053. Radiation-cooled transmitting triode
  1054. Radio amateur
  1055. Radio detector
  1056. Radio frequency heating
  1057. Radio receiver
  1058. Radio set
  1059. Radio station
  1060. Radioactively primed
  1061. Radiosonde
  1062. Random value
  1063. Raysistor
  1064. Readout
  1065. Readout digital indicator
  1066. Receiver input
  1067. Receiver vacuum tube
  1068. Receiving
  1069. Receiving tube
  1070. Rectification
  1071. Rectifier
  1072. Rectifier cold cathode
  1073. Rectifier CV
  1074. Rectifier diode
  1075. Rectifier half-wave
  1076. Rectifier mercury full-wave
  1077. Rectifier vacuum
  1078. Rectifier x-ray
  1079. Rectifier, grid-controlled
  1080. Rectifying tube
  1081. Reel-to-reel
  1082. Reflective-mode photocathode
  1083. Reflex circuit
  1084. Reflex klystron
  1085. Reflex klystron S-band
  1086. Reflex oscillator
  1087. Reflex radios
  1088. Refractory
  1089. Register digital indicator
  1090. Regulator
  1091. Relay
  1092. Relay / switch
  1093. Relay tetrode
  1094. Relay thermal delay
  1095. Relay triode
  1096. Remote-cutoff
  1097. Remote-cutoff RF Pentode
  1098. Remote-cutoff control grid
  1099. Remote-cutoff pentode
  1100. Remote-cutoff pentode dual detector diode
  1101. Remote-cutoff pentode dual diode
  1102. Remote-cutoff pentode medium-mu triode
  1103. Remote-cutoff RF pentode
  1104. Remote-cutoff RF pentode
  1105. Remote-cutoff tetrode
  1106. Repeater
  1107. Resettable counter
  1108. Resistive dummy load
  1109. Resistive element
  1110. Resonance
  1111. Resonant cavity
  1112. Resonant vacuum cavities
  1113. Resonator
  1114. Restrictor
  1115. Reticule
  1116. RF amplifier
  1117. RF indicator
  1118. RF Mixer
  1119. RF pentode
  1120. RF pentode and dual diode
  1121. RF pentode FL
  1122. RF power
  1123. RF power triode
  1124. RF power triode water-cooled
  1125. RF triode
  1126. RFIF amplifiers
  1127. Rhenium
  1128. Rhumbatron
  1129. Round wire-ended pencil tube
  1130. Ruggedized
  1131. S-band Magnetrons
  1132. S-band reflex Klystron
  1133. S-band strapped magnetron
  1134. Scintillation counter
  1135. Screen grid HF amplifier
  1136. Screen-grid tetrode
  1137. Secondary emission
  1138. Secondary emission amplifier
  1139. Secondary emission cathode
  1140. Secondary emission tube
  1141. Secondary emission VHF amplifier
  1142. Secondary-emission VHF pentode
  1143. Semiconductor vacuum electronic systems
  1144. Semiremote-cutoff RF Pentode
  1145. Semiremote-cutoff pentode
  1146. Semiremote-cutoff pentode dual detector diode
  1147. Sensor
  1148. Sensor mass-spectrometry
  1149. Sensor radiation
  1150. Sensor radiation Geiger counter
  1151. Sensor vacuum thermocouple
  1152. Separate-cathode
  1153. Series heater
  1154. Series regulator
  1155. Series-string
  1156. Servo system
  1157. Sharp-cutoff
  1158. Sharp-cutoff RF pentode
  1159. Sharp-cutoff dual control pentode for computer service
  1160. Sharp-cutoff dual tetrode
  1161. Sharp-cutoff IF/video pentode
  1162. Sharp-cutoff pentode
  1163. Sharp-cutoff RF Pentode
  1164. Sharp-cutoff RF pentode miniature base
  1165. Sharp-cutoff tetrode
  1166. SHF
  1167. Shield pin
  1168. Shielded pentode
  1169. Shielded Trigger pentode
  1170. Shield-grid tetrode thyratrons
  1171. Shock
  1172. Short-circuit
  1173. Shortwave
  1174. Shortwave bands
  1175. Shouldered glass
  1176. Shouldered glass envelope
  1177. Shouldered octal
  1178. Shouldered tubular bulb
  1179. Shunt regulator
  1180. Signal
  1181. Signal amplifier
  1182. Signal diode
  1183. Signal generator
  1184. Signal pentode
  1185. Signal processing tube
  1186. Signal tetrode
  1187. Signal triode
  1188. Signal triode gain
  1189. Signal tube
  1190. Silica envelope
  1191. Silica tube
  1192. Silicone
  1193. Single detector diode
  1194. Single element
  1195. Single pair electrostatic deflection
  1196. Single-cavity klystron
  1197. Single-ended
  1198. Single-ended Class-A circuit
  1199. Slow wave device
  1200. Small gas tetrode thyratron
  1201. Small gas triode thyratron
  1202. Solar collector
  1203. Solenoid
  1204. Solid anode magnetron
  1205. Sonar
  1206. Space discharge tube
  1207. Space-charge-grid tetrode
  1208. Spacer
  1209. Spark gap
  1210. Spark gap pulse modulator
  1211. Special cathode processing
  1212. Special oscillator section
  1213. Special purpose heptode
  1214. Spectral response
  1215. Spectrum analysis
  1216. Spectrum analyzer
  1217. Spigot
  1218. Split anode TV sync separator
  1219. Split triode-pentode
  1220. Split-anode magnetron
  1221. Stabilisator
  1222. Stabilotron
  1223. Stage
  1224. Stage count
  1225. Stage photomultiplier
  1226. Starter electrode
  1227. Storage deflection control tube
  1228. Storage radial beam tube
  1229. STransmission-mode
  1230. Strobe light
  1231. stroboscope lamp
  1232. Strobotron
  1233. Subminiature directly heated power pentode
  1234. Subminiature tube
  1235. Super high power generated electron tube
  1236. Superheater
  1237. Superheterodyne
  1238. Superheterodyne mixer
  1239. Superheterodyne Pentagrid converter
  1240. Super-high frequency
  1241. Suppressor grid
  1242. Surge arrester
  1243. Surge arrester gas
  1244. Sweep generator
  1245. Switch
  1246. Switch vacuum relay
  1247. Switching mode
  1248. Sync separation
  1249. TV turret tuner
  1250. Telecom pentode
  1251. Telephone repeater
  1252. Television camera
  1253. Television picture tube
  1254. Television tube
  1255. Television tube video amplifier
  1256. Temperature limited diode
  1257. Terminal
  1258. Tesla receiving tube
  1259. Tetrode
  1260. Tetrode beam power
  1261. Tetrode beam power radar modulator
  1262. Tetrode beam transmitting
  1263. Tetrode electrometer
  1264. Tetrode mixer
  1265. Tetrode power VHF
  1266. Tetrode pulse modulator
  1267. Tetrode transmitting
  1268. Tetrode transmitting power
  1269. T-Gauge
  1270. Thermal delay device
  1271. Thermionic converter
  1272. Thermionic relay
  1273. Thermionic valve
  1274. Thermistor protection
  1275. Thermocouple
  1276. Thermocouple protection
  1277. Thermocouple vacuum-gauge tube
  1278. Three-anode sharp-cutoff tetrode
  1279. Three-cavity electrostatically focused klystron
  1280. Three-phase
  1281. Thyratron
  1282. Thyratron hydrogen modulator
  1283. Thyratron radar modulator
  1284. Thyratron subminiature
  1285. Thyratron tetrode
  1286. Thyratron Xenon
  1287. Top cap
  1288. Top-cap connection
  1289. TR
  1290. TR cell
  1291. TR L-band
  1292. TR switch
  1293. TR switch microwave
  1294. TR switch X-band
  1295. TR Trigger triode one starter electrode only
  1296. TR tube
  1297. Transconductance
  1298. Transconductance radios
  1299. Transducer
  1300. Transformer
  1301. Transformer-coupled audio driver
  1302. Transmit/receive
  1303. Transmit-receive
  1304. Transmitter receiver front end
  1305. Transmitters
  1306. Transmitting
  1307. Transmitting or industrial single or dual triode
  1308. Transmitting pentode
  1309. Transmitting tetrode
  1310. Transmitting triode
  1311. Transmitting triode forced-air cooled
  1312. Transmitting triode indirectly heated plus dual top cap for grid and anode
  1313. Transmitting triode ‘silica valve’
  1314. Transmitting triode UHF
  1315. Transmitting triode water-cooled
  1316. Transmitting tube
  1317. Transmitting tube forced-air
  1318. Transmitting tube water cooled
  1319. Transverse magnetic field
  1320. Traveling wave
  1321. Traveling wave tube
  1322. Traveling-wave magnetron
  1323. Traveling-wave tube
  1324. Trigatron
  1325. Trigatron modulator
  1326. Trigger pentode
  1327. Trigger tetrode
  1328. Trigger tube
  1329. Triode
  1330. Triode air cooled
  1331. Triode amplification factor
  1332. Triode amplifier
  1333. Triode amplifier peanut
  1334. Triode external anode
  1335. Triode gas thyratrons
  1336. Triode grid
  1337. Triode industrial RF generator
  1338. Triode micropup
  1339. triode nuvistor
  1340. Triode pentode
  1341. Triode planar
  1342. Triode power
  1343. Triode power audio amplifier
  1344. Triode power dual
  1345. Triode power RF heating
  1346. Triode pulse modulator
  1347. Triode radar modulator
  1348. Triode receiving gas
  1349. Triode shunt regulator
  1350. Triode transmitting
  1351. Triode transmitting micropup
  1352. Triode transmitting power
  1353. Triode transmitting silica
  1354. Triode UHF
  1355. Triode UHF acorn
  1356. Triode UHF acorn CV
  1357. Triode UHF cermet
  1358. Triode UHF disk seal
  1359. Triode UHF doorknob
  1360. Triode UHF dual cap
  1361. Triode UHF lighthouse
  1362. Triode UHF pencil
  1363. Triode UHF power
  1364. Triode UHF power cermet
  1365. Triode UHF rocket
  1366. Triode UHF stacked electrodes
  1367. Triode UHF transmit
  1368. Triode UHF xmit
  1369. Triode UHF xmit disc-sealed
  1370. Triode UHF xmit doorknob
  1371. Triode UHF xmit HE
  1372. Triode UHF xmit micropup
  1373. Triode UHF xmit oil-can
  1374. Triode UHF xmit planar
  1375. Triode UHF xmit pulse
  1376. Triode UHF xmit pulse coaxial
  1377. Triode UHF xmit pulse micropup
  1378. Triode UHF xmit pulse oil-can
  1379. Triode UHF xmitpulse
  1380. Triode UHFSHF cermet
  1381. Triode UHFSHF cermet module
  1382. Triode VHF dual cap
  1383. Triode VHF power
  1384. Triode VHF transmitting (VT)
  1385. Triode VHF xmit micropup
  1386. Triode VHF xmit pulse micropup
  1387. Triode xmit air cooled
  1388. Triode xmit power
  1389. Triode xmit water-cooled
  1390. Triode/heptode mixer
  1391. Triode/hexode frequency converter
  1392. Triode/hexode frequency-changer
  1393. Triode/hexode mixer
  1394. Triode-heptode
  1395. Triode-heptode converter
  1396. Triode-heptode local oscillator-mixer
  1397. Triode-hexode
  1398. Triode-hexode local oscillator/mixer
  1399. Triode-hexode mixer
  1400. Triode-pentode combination
  1401. Triode-pentode converter
  1402. Triple diode high-mu triode
  1403. Triple triode compactron preamplifier
  1404. Trochotron
  1405. Trochotron beam switch noise source
  1406. Trochotron beam-switching tube
  1407. Trochotron noise source
  1408. Tube base
  1409. Tube checker
  1410. Tube socket
  1411. Tube tester set
  1412. Tunable microwave
  1413. Tunable voltage
  1414. Tuned RF amplifier
  1415. Tuned RF pre-amplifier stage
  1416. Tungsten
  1417. Tuning circuit
  1418. Tuning fork oscillators
  1419. Tuning indicator
  1420. Tuning-eye tube
  1421. Tunnel diode
  1422. TV damper/efficiency diode
  1423. TV IF
  1424. TV line output beam power tetrode
  1425. TV magnetic-deflection horizontal-output stage
  1426. TV receiver
  1427. TV station
  1428. TV test
  1429. TV tuner
  1430. TV UHF converter
  1431. TV UHF tuner
  1432. TV vertical output
  1433. Twin electrometer tetrode
  1434. Twin power triode
  1435. Twin tetrode transmitting
  1436. Twin triode common cathode
  1437. Twin triode DC amplifier
  1438. Twin triode frequency divider
  1439. Twin triode servo amplifier
  1440. Twin triode VHF amplifier
  1441. Twin-input triode
  1442. Twin-tetrode beam power VHF
  1443. Twin-triode power amplifier
  1444. Two-cavity klystron
  1445. Two-element device
  1446. TWT
  1447. TWT Amplifier
  1448. TWT amplifier GHz
  1449. TWT BWO
  1450. TWT carcinotron
  1451. TWT helix couplers
  1452. TWT Lorenz
  1453. TWT low-noise
  1454. TWT power
  1455. UHF
  1456. UHF cermet transmitting tetrode
  1457. UHF cermet triode low-noise amplifier
  1458. UHF medium-mu triode
  1459. UHF oscillator
  1460. UHF pencil triode
  1461. UHF power tetrode
  1462. UHF receiving pentode
  1463. UHF Transmitting Triode
  1464. UHF triode
  1465. UHF triode NR
  1466. UHF triode oscillator
  1467. UHF tube
  1468. UHF Xmit module
  1469. UHFSHF diode
  1470. Ultra high power generated electron tube
  1471. Ultra-high frequency
  1472. Under-chassis connection
  1473. Unijunction device
  1474. UV flame detector
  1475. UV photomultiplier
  1476. V dual triode
  1477. VHF
  1478. VHF receiver front end
  1479. VHF Triode
  1480. Vacuum capacitor
  1481. Vacuum channel transistor
  1482. Vacuum diode
  1483. Vacuum electron device
  1484. Vacuum full-wave rectifier
  1485. Vacuum glow discharge
  1486. Vacuum half-wave rectifier
  1487. Vacuum ionization gauge
  1488. Vacuum magnetic field mass
  1489. Vacuum magnetic field vibration
  1490. Vacuum panel display
  1491. Vacuum pentodes
  1492. Vacuum phototube
  1493. Vacuum phototube specific-color sensitive
  1494. Vacuum phototube spectral S response
  1495. Vacuum relay wcoil
  1496. Vacuum sensor
  1497. Vacuum SPDT switch
  1498. Vacuum switch
  1499. Vacuum tetrode
  1500. Vacuum triode
  1501. Vacuum triode shielded
  1502. Vacuum tube analog oscilloscope
  1503. Vacuum tube distributed amplifier
  1504. Vacuum tube generator
  1505. Vacuum tube volt meter
  1506. Vacuum tube with secondary emission
  1507. Vacuum-fluorescent-display
  1508. Valve
  1509. Valve cathode ray
  1510. Vapor cooled
  1511. Variable filament resistor
  1512. Variable transconductance
  1513. Variable-mu / remote-cutoff pentode
  1514. Vari-mu RF pentode
  1515. Vari-mu tetrode
  1516. Varistor
  1517. Velocity modulated tube
  1518. Vertical deflection output tube
  1519. Vertical output
  1520. Vertical Output Pentode
  1521. Very-high power tube
  1522. VHF dual triode
  1523. VHF RF triode
  1524. VHF sharp-cutoff RF tetrode
  1525. VHF Transmitting triode
  1526. VHF TV transmitter
  1527. VHF/RF triode
  1528. Vibrating capacitor
  1529. Vibration
  1530. Vibrotron
  1531. Video IF circuit
  1532. Video IF amplifier
  1533. Video image converter IR
  1534. Video image orthicon
  1535. Video pentode
  1536. Video signal
  1537. Vidicon
  1538. Viewfinder tube
  1539. Vircator
  1540. Virtual cathode
  1541. VM tube
  1542. Volt
  1543. Volt heater
  1544. Volt heater/filament tube
  1545. Voltage gradient
  1546. Voltage reference
  1547. Voltage reference tube
  1548. voltage regulation
  1549. Voltage regulator
  1550. Voltage stabilizer
  1551. Voltage tunable
  1552. Voltage tuned magnetron
  1553. Voltage-regulator
  1554. Water cooled
  1555. Water vapor discharge tube
  1556. Water-cooled power triode
  1557. Water-cooled transmitting triode
  1558. Water-cooled triode
  1559. Watt
  1560. Wheatstone bridge
  1561. White noise
  1562. X-band magnetron
  1563. X-band power amplifier
  1564. X-band reflex klystron
  1565. Xenon half wave rectifier
  1566. X-ray generator
  1567. X-ray image intensifier
  1568. X-ray tube
  1569. Zero anode power