Voltage - Triode (single) vacuum tubes

Triode

General-purpose detector and amplifier triode for early radio receivers, providing directly heated low-power signal detection and amplification.

Base

4D

Socket

UX4

Heater

5 V

Sections

1

Triode

Western Electric directly heated triode for professional electronic service. Available source material confirms its construction without establishing a narrower functional role confidently.

Base

Not recorded

Socket

UV4

Heater

4.5 V

Sections

1

Triode

Western Electric directly heated triode for professional electronic service. Available source material confirms its construction without establishing a narrower functional role confidently.

Base

Not recorded

Socket

UV4

Heater

4.15 V

Sections

1

Triode

Low-power filamentary triode for carrier-system modulation and amplification in professional communications equipment.

Base

Not recorded

Socket

UV4

Heater

4.15 V

Sections

1

Triode

Filamentary triode for audio-frequency amplification or modulation, using a low-current directly heated cathode for professional communications circuits.

Base

Not recorded

Socket

UV4

Heater

4.15 V

Sections

1

Triode

Quick-heating filamentary triode for audio-frequency amplification or modulation, designed for rapid readiness in professional communications equipment.

Base

Not recorded

Socket

UV4

Heater

3.75 V

Sections

1

Triode

Western Electric directly heated triode for professional electronic service. Available source material confirms its construction without establishing a narrower functional role confidently.

Base

Not recorded

Socket

UV4

Heater

2.1 V

Sections

1

Triode

Filamentary detector and amplifier triode for low-level signal service, with a 160-volt maximum safe plate voltage.

Base

Not recorded

Socket

UV4

Heater

2.25 V

Sections

1

Triode

Western Electric directly heated triode for professional electronic service. Available source material confirms its construction without establishing a narrower functional role confidently.

Base

Not recorded

Socket

UV4

Heater

2.1 V

Sections

1

Triode

Low-noise filamentary voltage-amplifier triode for sensitive professional signal amplification.

Base

Not recorded

Socket

UV4

Heater

2.1 V

Sections

1

Triode

Filamentary triode for audio-frequency voltage amplification or modulation in professional communications and signal-processing equipment.

Base

Not recorded

Socket

UV4

Heater

Not recorded

Sections

1

Triode

Western Electric directly heated triode for professional electronic service. Available source material confirms its construction without establishing a narrower functional role confidently.

Base

Not recorded

Socket

UV4

Heater

4.5 V

Sections

1

Triode

Directly heated triode for detector and amplifier service in dry-cell radio receivers, with a very low-voltage filament suited to battery operation.

Base

Not recorded

Socket

UX4

Heater

1.1 V

Sections

1

Triode

Directly heated storage-battery triode for detector and audio-frequency amplifier service in early radio receivers.

Base

Not recorded

Socket

UX4

Heater

5 V

Sections

1

Triode

Ediswan/Mazda indirectly heated triode for general electronic amplification. Available source material does not establish a narrower functional application confidently.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Triode

Directly heated triode for detector and amplifier service in early receiving equipment.

Base

4D

Socket

UX4

Heater

5 V

Sections

1

Triode

High-mu triode for series-heater AC/DC receiver service, providing voltage amplification in transformerless radio equipment.

Base

5M

Socket

IO

Heater

12.6 V

Sections

1

Triode

Medium-mu miniature general-purpose triode for voltage amplification in receiving and general electronic equipment.

Base

7B6

Socket

B7G

Heater

12.6 V

Sections

1

Triode

General-purpose medium-mu miniature triode voltage amplifier with dual 6.3/12.6-volt heater capability for flexible series or parallel heater circuits.

Base

7DM

Socket

B7G

Heater

12.6 V

Sections

1

Triode

General-purpose indirectly heated triode for voltage amplification and related receiving-equipment service.

Base

60

Socket

IO

Heater

12.6 V

Sections

1

Triode

General-purpose triode for resistance-coupled voltage amplification and oscillator service in radio and electronic equipment.

Base

60

Socket

IO

Heater

12.6 V

Sections

1

Triode

Rugged 12.6-volt heater triode for voltage-amplifier service in equipment requiring improved mechanical reliability.

Base

60

Socket

IO

Heater

12.6 V

Sections

1

Triode

Russian oscillator triode intended for signal-generation service. Available translated source material supports oscillator operation without a more specific application.

Base

Not recorded

Socket

Not recorded

Heater

12.6 V

Sections

1

Triode

High-mu indirectly heated triode for voltage-amplifier service in receiving and general electronic equipment.

Base

6AB

Socket

IO

Heater

12.6 V

Sections

1

Triode

GT-envelope high-mu triode for Class-A voltage-amplifier service in receiving and general electronic equipment.

Base

6AB

Socket

IO

Heater

12.6 V

Sections

1

Triode

Medium-mu receiving triode with a 12.6 V, 150 mA heater, intended for general small-signal amplification in series-heater electronic equipment.

Base

6O

Socket

IO

Heater

12.6 V

Sections

1

Triode

Medium-mu receiving triode with a 12.6 V, 150 mA heater, intended for general small-signal amplification in series-heater electronic equipment.

Base

5AC

Socket

Not recorded

Heater

12.6 V

Sections

1

Triode

Directly heated medium-mu triode for low-power Class A amplifier service in receiving and general small-signal electronic equipment.

Base

5CF

Socket

Not recorded

Heater

1.4 V

Sections

1

Triode

Directly heated medium-mu triode for Class A voltage amplification in receiving and general small-signal electronic equipment.

Base

5S

Socket

Not recorded

Heater

1.4 V

Sections

1

Triode

Low-consumption general-purpose triode for battery receivers, usable as a voltage amplifier or as a driver for a Class B audio-output stage.

Base

G-6X

Socket

IO

Heater

1.4 V

Sections

1

Triode

Directly heated medium-mu triode for Class A amplification, using a very low-power filament suited to battery-operated equipment.

Base

G-6X

Socket

Not recorded

Heater

1.4 V

Sections

1

Triode

Low-filament-power directly heated medium-mu triode for battery-operated signal amplification and general receiving service.

Base

4AA

Socket

B8G

Heater

1.4 V

Sections

1

Triode

Low-filament-power directly heated medium-mu triode for battery-operated signal amplification and general receiving service.

Base

4AA

Socket

Not recorded

Heater

1.4 V

Sections

1

Triode

Telefunken Arcotron 201 directly heated early audio-frequency voltage amplifier for resistance-coupled circuits, with 1 V 0.25 A filament and recommended 1 MΩ anode load.

Base

Not recorded

Socket

Not recorded

Heater

1 V

Sections

1

Triode

Mesh-plate medium-gain directly heated driver triode for signal or driver amplification.

Base

UX4

Socket

Not recorded

Heater

5 V

Sections

1

Triode

Cossor directly heated triode for detector and receiver-amplifier service, using a low-power two-volt filament.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Triode

Cossor directly heated triode for receiver amplification, using a low-power two-volt filament in battery-operated equipment.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Triode

Cossor directly heated triode for low-frequency receiver amplification, using a low-power two-volt filament.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Triode

Cossor directly heated triode for resistance-coupled receiver amplification, using a low-power two-volt filament.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Triode

Cossor directly heated triode for receiver and amplifier service, using a low-power two-volt filament.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Triode

Filamentary triode for amplifier and oscillator service in professional electronic equipment.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

5.5 V

Sections

1

Triode

Directly heated triode for early battery-operated receiving and amplification service. Available source material does not establish a narrower function confidently.

Base

Not recorded

Socket

Not recorded

Heater

3.3 V

Sections

1

Triode

Cossor directly heated triode for receiver and amplifier service, using a two-volt battery filament.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Triode

Cossor directly heated triode for receiver and amplifier service, using a two-volt battery filament.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Triode

Western Electric low-filament-power directly heated triode for professional signal amplification and general electronic service.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

3.1 V

Sections

1

Triode

Western Electric heater-cathode triode for professional amplification service. Available source material does not establish a narrower functional role confidently.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

2 V

Sections

1

Triode

Western Electric general-purpose heater-cathode triode with published Class A operating data for signal and audio amplification.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

2 V

Sections

1

Triode

Western Electric general-purpose directly heated triode with oxide-coated filament and published Class A operating data.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

3.1 V

Sections

1