Electronic tube type
Voltage - Pentode or Tetrode (under 100V) vacuum tubes
Voltage - Pentode or Tetrode (under 100V) records in Tube Tinker cover 162 tube designations, including 598 preserved original datasheets. Compare bases, sockets, heater requirements, construction, exact variations, and directional replacement options.
- Tube records
- 162
- Original datasheets
- 598
- Variation families
- 17
- Tubes with alternatives
- 54
About Voltage - Pentode or Tetrode (under 100V) tubes
If the tube is either a tetrode or a pentode that did not fall into any of the Power tube categories, AND its max plate voltage is under 100 volts. Then apply this type.
Electrical range
- Nominal heater voltage
- 0.625–26.5 V
- Nominal heater current
- 0.008–1.1 A
Common voltage - pentode or tetrode (under 100v) characteristics
These are the most frequently recorded attributes among tubes in this category.
Bases
- B7G6
- SUBMINIATURE5
- 1AD44
- 7BK4
- 7CH4
- 1AJ52
- 2E312
- 2E412
Sockets
- B7G43
- B9A20
- WIRE814
- B8D7
- IO6
- B5D5
- B8G5
- SUBMINIATURE73
Constructions
- Pentode81
- Heptode24
- Diode-Pentode22
- Tetrode14
- Diode-Diode-Tetrode7
- Tetrode-Tetrode4
- Diode-Diode-Pentode3
- Pentode-Triode2
Voltage - Pentode or Tetrode (under 100V) tube list
Page 4 of 4
EBF83 Diode-Diode-Pentode
Double-diode pentode for receiver amplification and detector service, notable for useful operation at unusually low electrode voltages. Two diodes provide associated detection and rectification functions.
- Base
- NOVAL
- Socket
- B9A
- Heater
- 6.3 V
- Sections
- 3
EF97 Pentode
Variable-mutual-conductance RF pentode for controlled RF/IF amplification and mixer service. Its gain-control characteristic is central to receiver operation, while mixer capability is secondary rather than a dedicated oscillator-converter function.
- Base
- MINIATURE
- Socket
- B9A
- Heater
- 6.3 V
- Sections
- 1
EF98 Pentode
Low-voltage pentode for oscillator, RF/IF amplifier, mixer, and transistor-driver service directly from 6–24 V supplies. Its broad low-voltage amplifier role outweighs any single radio-converter application.
- Base
- MINIATURE
- Socket
- B7G
- Heater
- 6.3 V
- Sections
- 1
EM10 Pentode
Extremely low-power electrometer pentode designed for output stages of sensitive electrometer amplifiers and minute-signal measurement circuits.
- Base
- Not recorded
- Socket
- B9A
- Heater
- 0.7 V
- Sections
- 1
EM12 Tetrode
Low-noise electrometer tetrode for digital instruments and precision measuring circuits. High input resistance and reduced noise suit very-small-current measurement.
- Base
- Not recorded
- Socket
- P8A
- Heater
- 6.3 V
- Sections
- 1
FC141 Heptode
Radio receiver frequency changer combining oscillator and mixer functions for superheterodyne conversion. Its multi-grid construction translates incoming RF signals to the intermediate frequency within the receiver front end.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 1.4 V
- Sections
- 1
LV5 Tetrode
Telefunken space-charge-grid tetrode for special low-voltage operation, with its internal space-charge grid tied to the screen grid.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 12.6 V
- Sections
- 1
ME1400 Pentode
Electrometer pentode for extremely high-resistance circuits including pH meters, photocell units, and valve voltmeters.
- Base
- Not recorded
- Socket
- IO
- Heater
- 4.5 V
- Sections
- 1
ME1402 Tetrode
Subminiature electrometer tetrode for precision measurement, specified for extraordinarily low grid current around 3×10⁻¹⁵ A and low-power DC filament operation.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 1.25 V
- Sections
- 1
ME1403 Pentode
Subminiature directly heated electrometer pentode with grid current around 3×10⁻¹³ A for measurement of extremely small currents.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 1.25 V
- Sections
- 1
ME1406 Pentode
Ultra-low-drain directly heated electrometer-type pentode for sensitive measurement circuits handling minute currents.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 1.25 V
- Sections
- 1
R43 Tetrode
Low-voltage bi-grid receiving tube for detection and RF or AF amplification. Its design reduces plate-battery voltage and operating cost in battery receivers.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- Not recorded
- Sections
- 1
RE074D Tetrode
Directly heated space-charge-grid double-grid tube for very-low-anode-voltage detector and AF-amplifier service in portable battery receivers.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 4 V
- Sections
- 1
SP141 Pentode
High-frequency receiving pentode designed for RF and intermediate-frequency amplifier service.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 1.4 V
- Sections
- 1
T113 Tetrode
Directly heated electrometer tetrode using a space-charge grid for extremely low-current measurement, with very low grid current and explicit precautions concerning insulation, vibration, and ionization.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 3 V
- Sections
- 1
T116 Tetrode
Directly heated electrometer tetrode using a space-charge grid for extremely low-current measurement, with very low grid current and careful insulation requirements for precision instrumentation.
- Base
- Not recorded
- Socket
- Not recorded
- Heater
- 1.25 V
- Sections
- 1
X18 Heptode
Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.
- Base
- Not recorded
- Socket
- B7G
- Heater
- 1.4 V
- Sections
- 1
ZD17 Diode-Pentode
Low-consumption directly heated diode-pentode for battery receiver detector and amplifier service, using a 1.4 V, 50 mA filament to minimize portable-equipment drain.
- Base
- B7G
- Socket
- B7G
- Heater
- 1.4 V
- Sections
- 2