Power - Triode Single (under 10W) vacuum tubes

Triode

Indirectly heated triode for general electronic service. Available source material confirms triode construction without establishing a narrower functional application confidently.

Base

Not recorded

Socket

B9A

Heater

12.6 V

Sections

1

Triode

Low-mu triode intended for stable RF oscillator service. Published Class C telegraphy operation at 250 V produces about 4 W output, with full-rating operation specified to approximately 30 MHz.

Base

Not recorded

Socket

IO

Heater

12.6 V

Sections

1

Triode

Directly heated Philips triode designed for telephone equipment and output service, providing low-frequency power amplification in communications circuits.

Base

Not recorded

Socket

Not recorded

Heater

4.4 V

Sections

1

Triode-Triode

1N3S power - triode single (under 10w) electronic tube specifications and datasheets.

Base

Not recorded

Socket

Not recorded

Heater

1.2 V

Sections

2

Triode

Lighthouse-style power triode for UHF and microwave oscillator and amplifier service. Its compact low-inductance electrode geometry supports operation well into the gigahertz region, with published oscillator performance extending to roughly 3.4 GHz.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Triode

Standard Valves triode with published construction, electrical constants, limiting conditions, and operating information; available evidence does not support a narrower functional category.

Base

Not recorded

Socket

B5

Heater

4.5 V

Sections

1

Triode

Telephone repeater triode for professional communications amplification.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

4.5 V

Sections

1

Triode

Special-limits tested telephone repeater triode for professional communications amplification.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

4.5 V

Sections

1

Triode

Very-high-transconductance indirectly heated triode for high-gain signal amplification.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode-Triode

Directly heated high-frequency twin triode intended for portable or battery equipment, usable as an RF amplifier or oscillator and capable of about 2 W push-pull Class-C RF output at 40 MHz.

Base

7BC

Socket

B7G

Heater

2.8 V

Sections

2

Triode

Telephone repeater triode for professional communications amplification.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

4.5 V

Sections

1

Triode

Special-limits tested telephone repeater triode for professional communications amplification.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

4.5 V

Sections

1

Triode

3B100B triode for general electronic amplification. Available source material does not establish a narrower functional application confidently.

Base

Not recorded

Socket

B5

Heater

4 V

Sections

1

Triode

Standard Valves 3B/100-B indirectly heated British five-pin audio power triode with 4 V 1.1 A heater, amplification factor 13 and maximum 10 W anode dissipation.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

1

Triode

High-mu ceramic-metal pencil triode for pulsed RF amplification, oscillation, and frequency multiplication into the multi-gigahertz region. High transconductance and compact low-inductance construction provide strong gain in microwave-frequency pulse circuits.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Cossor triode valve documented with construction, technical data, operating recommendations, and application notes; available evidence does not justify a narrower functional category.

Base

Not recorded

Socket

B4

Heater

40 V

Sections

1

Triode

High-mu ceramic-metal pencil triode for RF power amplification, oscillation, and frequency multiplication. Compact low-inductance construction and modest plate dissipation make it suitable for high-frequency circuits where conventional lead structures are limiting.

Base

Not recorded

Socket

B4

Heater

6.3 V

Sections

1

Triode

Medium-mu ceramic-metal pencil triode designed for pulsed and continuous-wave RF oscillator and amplifier service.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Directly heated Standard Valves 4104-series triode; variants differ chiefly in filament treatment and grid-to-anode insulation rather than documented application.

Base

Not recorded

Socket

MEDIUM4BAYONET

Heater

4.5 V

Sections

1

Triode

Directly heated Standard Valves 4104-series triode; variants differ chiefly in filament treatment and grid-to-anode insulation rather than documented application.

Base

Not recorded

Socket

UX4

Heater

4.4 V

Sections

1

Triode

Directly heated Standard Valves 4104-series triode; variants differ chiefly in filament treatment and grid-to-anode insulation rather than documented application.

Base

Not recorded

Socket

UX4

Heater

4.4 V

Sections

1

Triode

Disc-seal planar triode for microwave amplification or frequency multiplication at frequencies around 4 GHz.

Base

Not recorded

Socket

DISCSEAL4

Heater

Not recorded

Sections

1

Triode

Low-noise planar microwave triode for amplifier, mixer, and oscillator service from roughly 200 MHz to 4 GHz, with high transconductance and long-life variants.

Base

Not recorded

Socket

DISCSEAL4

Heater

6.3 V

Sections

1

Triode

Directly heated transmitting power triode intended for RF amplifier, oscillator, or modulator service. Manufacturer operating data emphasize radio-frequency power generation, substantial plate loading, and professional transmitter applications.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Directly heated telephone repeater triode for professional communications amplification.

Base

Not recorded

Socket

Not recorded

Heater

4.5 V

Sections

1

Triode-Triode

High-perveance medium-mu double triode with independent sections and series/parallel heater operation, intended for general amplifier service and also carrying published pulse ratings.

Base

9H

Socket

B9A

Heater

12.6 V

Sections

2

Triode

Coaxial pencil-type UHF power triode for RF amplification and oscillation. Its low-inductance construction supports full Class A and Class C ratings to roughly 1.7 GHz and operation at high altitude.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Triode

Medium-mu transmitting triode designed for pulsed oscillator and RF power-amplifier service. Its published ratings emphasize high-frequency pulse operation, combining modest plate dissipation with high-voltage transmitting conditions.

Base

PENCIL

Socket

B9A

Heater

6 V

Sections

1

Triode

Premium subminiature low-mu high-perveance power triode for compact output and driver applications requiring comparatively high current capability.

Base

8DM

Socket

B8D

Heater

6.3 V

Sections

1

Triode

Water-cooled transmitting triode for grounded-grid Class B RF amplifier and Class C amplifier/oscillator service in television and FM transmitters.

Base

Not recorded

Socket

Not recorded

Heater

5 V

Sections

1

Triode

Western Electric/RMA triode with published operating data. Available source material does not establish a narrower functional application confidently.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Ceramic-metal high-mu planar triode for radio-frequency service to approximately 4 GHz.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Power triode intended for radio-frequency amplifier and oscillator service. Manufacturer documentation emphasizes RF power operation and transmitting applications rather than ordinary receiving-tube voltage amplification.

Base

6BG

Socket

B7G

Heater

6.3 V

Sections

1

Triode-Triode

Russian high-current, low-plate-resistance twin triode in an enhanced-reliability version, intended for broadband amplification and demanding electronic service with extended operating life.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Triode-Triode

Russian high-current twin triode in a reliability-qualified version, combining low plate resistance and high transconductance for broadband amplifier and demanding electronic applications.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

2

Triode-Triode

Russian high-current twin triode in an extended-life, high-reliability version, intended for broadband amplification and severe-duty electronic service.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

2

Triode

Indirectly heated triode intended for oscillator service.

Base

BBA

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Soviet high-frequency power triode for specialized RF service. Available manufacturer data show useful transconductance, several watts of plate dissipation, and kilovolt-class plate capability, emphasizing RF power operation rather than conventional audio output.

Base

Not recorded

Socket

Not recorded

Heater

5.7 V

Sections

1

Triode

Very-low-mu power triode specifically designed as a series pass tube in regulated power supplies, with 8-watt plate dissipation.

Base

9FR

Socket

B9A

Heater

6.3 V

Sections

1

Triode

High-mu triode amplifier for regulated power supplies, voltage amplifiers, television, oscilloscopes, and other high-voltage low-current circuits.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode-Triode

General-purpose medium-mu high-current double triode, electrically equivalent to the 5687 family, with independent sections and a series/parallel heater arrangement.

Base

Not recorded

Socket

B9A

Heater

40 V

Sections

2

Triode

High-perveance triode with series/parallel heater capability for general electronic service.

Base

Not recorded

Socket

B9A

Heater

12.6 V

Sections

1

Triode

High-mu miniature power triode designed for continuous Class C RF amplifier service. Its 5 W plate dissipation and useful operation to about 200 MHz make it a compact VHF transmitting or driver tube.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Triode

High-reliability ceramic-metal planar triode designed for pulsed airborne service at frequencies extending to approximately 3 GHz.

Base

Not recorded

Socket

Not recorded

Heater

5.7 V

Sections

1

Triode

High-reliability forced-air-cooled ceramic-metal planar triode for pulsed airborne service at frequencies extending to approximately 3 GHz.

Base

Not recorded

Socket

Not recorded

Heater

5.7 V

Sections

1

Triode

High-reliability ceramic-metal planar triode designed for transponder and pulsed airborne service at frequencies extending to approximately 3 GHz.

Base

Not recorded

Socket

Not recorded

Heater

5.7 V

Sections

1

Triode

High-mu ceramic-metal planar triode designed for plate-pulsed oscillator or amplifier operation at frequencies extending to approximately 6 GHz.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

High-mu ceramic-metal planar triode designed primarily for oscillator or radio-frequency power-amplifier service.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1