Nonode

A nonode is a type of thermionic valve that has nine active electrodes. The term most commonly applies to a seven-grid vacuum tube, also sometimes called an enneode. An example was the EQ80/UQ80, which was used as an FM quadrature detector.[1] It was developed during the introduction of TV and FM radio and delivered an output voltage large enough to directly drive an end pentode while still allowing for some negative feedback. As most of the grids were tied together, even an 8-pin Rimlock base was sufficient in the case of the EQ40.

## See also

Nonode 6Л1П (6L1P), Manufactured in Novosibirsk, 1970

## References

1. ↑ Schindler, Patrik. "EQ80 Enneode". Electron Tube Data sheets: pp. 413–422. https://frank.pocnet.net/sheets/046/e/EQ80.pdf.

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Thermionic valves

Theoretical principles|

* Thermionic emission
* Work function
* Hot cathode
* Space charge
* Control grid
* Suppressor grid
* Anode
* Glowing anode
* Getter

Types|

* Diode
* Audion
* Triode
* Acorn tube
* Nuvistor
* Tetrode
* Beam tetrode
* Pentode
* Pentagrid (Hexode, Heptode, Octode)
* Nonode
* Cathode ray tube
* Additron
* Backward-wave oscillator
* Beam deflection tube
* Charactron
* Compactron
* Eidophor
* Iconoscope
* Inductive output tube
* Kinescope
* Klystron
* Magic eye
* Magnetron
* Monoscope
* Phototube
* Photomultiplier
* Selectron tube
* Storage tube
* Sutton tube
* Talaria projector
* Traveling-wave tube
* Trochotron
* Video camera tube
* Williams tube
* Fleming valve

Numbering systems|

* RMA
* RETMA
* Marconi-Osram
* Mullard–Philips
* JIS
* Russian

Examples|

* List of vacuum tubes
* List of tube sockets

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Electronic components

Semiconductor
devices|

| MOS transistors|

* BiCMOS
* BioFET
* Chemical field-effect transistor (ChemFET)
* Complementary MOS (CMOS)
* Depletion-load NMOS
* Fin field-effect transistor (FinFET)
* Floating-gate MOSFET (FGMOS)
* Insulated-gate bipolar transistor (IGBT)
* ISFET
* LDMOS
* MOS field-effect transistor (MOSFET)
* Multi-gate field-effect transistor (MuGFET)
* NMOS
* PMOS
* Power MOSFET
* Thin-film transistor (TFT)
* VMOS

|

Other transistors|

* Bipolar junction transistor (BJT)
* Darlington transistor
* Diffusion transistor
* Field-effect transistor (FET)
* JFET
* Light-emitting transistor (LET)
* Organic field-effect transistor (OFET)
* Organic light-emitting transistor (OLET)
* Pentode transistor
* Point-contact transistor
* Programmable unijunction transistor (PUT)
* Static induction transistor (SIT)
* Tetrode transistor
* Unijunction transistor (UJT)

Diodes|

* Avalanche diode
* Constant-current diode (CLD, CRD)
* Laser diode (LD)
* Light-emitting diode (LED)
* Organic light-emitting diode (OLED)
* Photodiode
* PIN diode
* Schottky diode
* Step recovery diode
* Zener diode

Other devices|

* DIAC
* Heterostructure barrier varactor
* Integrated circuit (IC)
* Memistor
* Memory cell
* Memristor
* Organic semiconductor
* Photodetector
* Solaristor
* Quantum circuit
* Silicon controlled rectifier (SCR)
* Static induction thyristor (SITh)
* Three-dimensional integrated circuit (3D IC)
* Thyristor
* TRIAC
* Varicap

Voltage regulators|

* Linear regulator
* Low-dropout regulator
* Switching regulator
* Buck
* Boost
* Buck–boost
* Split-pi
* Ćuk
* SEPIC
* Charge pump
* Switched capacitor

Vacuum tubes|

* Acorn tube
* Audion
* Beam tetrode
* Barretter
* Compactron
* Diode
* Fleming valve
* Nonode
* Nuvistor
* Pentagrid (Hexode, Heptode, Octode)
* Pentode
* Photomultiplier
* Phototube
* Tetrode
* Triode

Vacuum tubes (RF)|

* Backward-wave oscillator (BWO)
* Cavity magnetron
* Crossed-field amplifier (CFA)
* Gyrotron
* Inductive output tube (IOT)
* Klystron
* Maser
* Sutton tube
* Traveling-wave tube (TWT)

Cathode ray tubes|

* Beam deflection tube
* Charactron
* Iconoscope
* Magic eye tube
* Monoscope
* Selectron tube
* Storage tube
* Trochotron
* Video camera tube
* Williams tube

Gas-filled tubes|

* Cold cathode
* Crossatron
* Dekatron
* Ignitron
* Krytron
* Mercury-arc valve
* Neon lamp
* Nixie tube
* Thyratron
* Trigatron
* Voltage-regulator tube

Adjustable|

* Potentiometer
* digital
* Variable capacitor
* Varicap

Passive|

* Connector
* audio and video
* electrical power
* RF
* Electrolytic detector
* Ferrite
* Fuse
* resettable
* Resistor
* Switch
* Thermistor
* Transformer
* Varistor
* Wire
* Wollaston wire

Reactive|

* Capacitor
* types
* Ceramic resonator
* Crystal oscillator
* Inductor
* Parametron
* Relay
* reed relay
* mercury switch

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