Power - Triode vacuum tubes

Triode-Triode

Low-mu twin power triode designed for series-regulator service in DC power supplies. Electrically related to the 5998 but using a different envelope and base, it emphasizes high current and very low plate resistance.

Base

8BD

Socket

IO

Heater

6.3 V

Sections

2

Triode

Metal-ceramic transmitting triode for grounded-grid Class B or Class C RF power-amplifier and oscillator service.

Base

Not recorded

Socket

Not recorded

Heater

10 V

Sections

1

Triode

Subminiature high-efficiency oscillator triode for radiosonde and transmitting service.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Triode-Triode

High-current dual power triode designed for series-voltage-regulator and power-control service. Its identical low-mu sections have very low plate resistance, emphasizing current handling and low voltage drop rather than voltage amplification.

Base

8BD

Socket

IO

Heater

6.3 V

Sections

2

Triode-Triode

High-current, very low-mu dual power triode designed for series-pass voltage-regulator circuits, with substantial plate dissipation and current capability in each section.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

2

Triode-Triode

Ruggedized high-current dual power triode for series-regulator service, designed for severe mechanical environments and capable of operating its two sections in parallel as a pass element.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

2

Triode-Triode

High-reliability rugged dual power triode for series-regulator and mobile-equipment service, combining very low amplification factor with high cathode-current and plate-dissipation capability.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

2

Triode-Triode

Low-mu twin power triode intended for regulator and DC-amplifier service under shock and vibration, with high-current sections and low plate resistance.

Base

8BD

Socket

IO

Heater

26.5 V

Sections

2

Triode-Triode

Ruggedized low-mu twin power triode for voltage-regulator and DC-amplifier applications, providing two high-current, low-resistance sections for demanding control service.

Base

B8-94

Socket

IO

Heater

26.5 V

Sections

2

Triode

Compact medium-mu transmitting triode designed for mobile and aircraft RF power-amplifier and oscillator service. Its 13 W plate-dissipation rating and 400 V plate capability suit relatively low-power airborne and mobile transmitters.

Base

Pencil

Socket

Not recorded

Heater

6 V

Sections

1

Triode

Pencil-type UHF power triode for RF amplifier and oscillator service. Its compact low-inductance construction, 13 W plate dissipation, and amplification factor around 40 suit high-frequency transmitting circuits.

Base

Not recorded

Socket

IO

Heater

6 V

Sections

1

Triode

Medium-mu transmitting triode for mobile and aircraft RF amplifier, oscillator, and frequency-multiplier service through approximately 1700 MHz.

Base

Pencil

Socket

Not recorded

Heater

6 V

Sections

1

Triode

Pencil-type UHF power triode for RF amplification and frequency multiplication. Compact low-inductance construction supports full ratings around 500 MHz and reduced-rating operation well into the gigahertz region, with approximately 13 W plate dissipation.

Base

Not recorded

Socket

IO

Heater

6 V

Sections

1

Triode-Triode

High-current dual power triode designed primarily for stabilized power supplies. Its two low-resistance, high-transconductance sections control large DC current with relatively little voltage drop, making the tube especially suited to series-pass regulation and power-control circuits.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Triode

Very-high-current dual power triode for series voltage regulation and power control. Each section combines exceptionally low plate resistance, high transconductance, and roughly 30 W plate dissipation for heavy-duty pass-tube service.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

2

Triode

Rugged twin power triode designed for series-regulator and pass-tube service. Its identical high-current sections emphasize low plate resistance and roughly 30 W dissipation each for demanding regulated power supplies and power-control equipment.

Base

B8-98

Socket

IO

Heater

6.3 V

Sections

2

Triode

High-power pulse triode with published transmitting-class electrical ratings and operating data.

Base

Not recorded

Socket

Not recorded

Heater

11 V

Sections

1

Triode

High-power pulse triode with published transmitting-class electrical ratings and operating data.

Base

Not recorded

Socket

Not recorded

Heater

13 V

Sections

1

Triode

RCA 6383 high-power liquid-cooled coaxial UHF transmitting triode rated 600 W plate dissipation for RF amplification and oscillation to 2 GHz.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Dual power triode for specialized high-current service. The available manufacturer documentation is too sparse to support a narrower functional assignment or specialized canonical tags, so the description remains conservative rather than inferring an application.

Base

Not recorded

Socket

IO

Heater

26.5 V

Sections

2

Triode

Low-mu high-perveance twin power triode designed for series-pass and DC regulator service. Closely balanced sections, very low plate resistance, and high current capability make it especially suitable for stabilized power supplies and control circuits.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

2

Triode

Rugged long-life twin power triode developed as a high-current series-pass tube for regulated power supplies. Each section combines very high transconductance, low plate resistance, and approximately 30 W dissipation for demanding regulator and power-control service.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

2

Triode

Rugged medium-mu twin power triode for high-current series-regulator and pass-tube service. Very high transconductance, low plate resistance, and roughly 30 W plate dissipation per section support powerful stabilized supplies and control applications.

Base

B8-98

Socket

IO

Heater

6.3 V

Sections

2

Triode

Water-cooled thoriated-tungsten power triode for high-power RF amplification and industrial oscillators. Published industrial operation produces roughly 33 kW output, making it well suited to industrial heating generators and major transmitter equipment.

Base

Not recorded

Socket

Not recorded

Heater

7.5 V

Sections

1

Triode

Forced-air-cooled counterpart to the 6800 high-power industrial RF triode. Approximately 10 kW plate dissipation and published output around 28 kW provide major RF power without the water-cooling system used by the 6800.

Base

Not recorded

Socket

Not recorded

Heater

7.5 V

Sections

1

Triode

Forced-air-cooled planar triode for oscillator, amplifier, and frequency-multiplier service through approximately 3 GHz, using low-inductance cavity mounting.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

High-mu metal-ceramic planar triode for grounded-grid RF oscillator and amplifier service to approximately 2.5 GHz. High transconductance, low capacitance, and 100 W plate dissipation provide useful microwave power from compact cavity circuits.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Directly heated low-mu audio power triode for final output stages in AC receivers and amplifiers. Approximately 15 W plate dissipation and high transconductance support several watts of single-ended Class A output as well as push-pull audio service.

Base

4D

Socket

UX4

Heater

6.3 V

Sections

1

Triode

Indirectly heated power triode for Class-A and push-pull audio-output amplifier stages, closely related electrically to the directly heated 6A3.

Base

6T

Socket

IO

Heater

6.3 V

Sections

1

Triode-Triode

Double power triode used chiefly for Class-B output service in AC receivers; its sections may also be paralleled as a Class-A driver or operated separately as voltage amplifiers.

Base

7B

Socket

UX5

Heater

6.3 V

Sections

2

Triode-Triode

Triadyne dynamic-coupled power-output tube developed for automobile radios, with Class-A and push-pull operating data and reduced heater power.

Base

Not recorded

Socket

OCTAL7

Heater

6.3 V

Sections

2

Triode

High-mu power triode for positive-grid Class A resistance-coupled amplification and Class B audio output. Its unusual positive-grid operating mode permits dynamic coupling from a driver tube, providing useful output without a conventional driver arrangement.

Base

8

Socket

IO

Heater

6.3 V

Sections

1

Triode

Octal glass high-mu power triode for positive-grid audio amplification. Dynamic coupling from a driver tube and an unusually high amplification factor distinguish it from conventional low-mu output triodes, with published output around several watts.

Base

6O

Socket

IO

Heater

6.3 V

Sections

1

Triode-Triode

Triadyne power-output tube for small AC receivers using approximately 180 V plate supplies, with single-ended Class-A and push-pull audio operation.

Base

Not recorded

Socket

OCTAL7

Heater

6.3 V

Sections

2

Triode-Triode

Dynamic-coupled twin-triode power amplifier whose internally connected input and output triodes provide high plate efficiency for Class-A audio power-output service.

Base

7W

Socket

IO

Heater

6.3 V

Sections

2

Triode-Triode

Dual low-mu high-current power triode developed primarily for series-pass voltage-regulator service. Very low plate resistance and substantial current capability make its two sections effective control elements in stabilized DC supplies and other high-current circuits.

Base

8BD

Socket

IO

Heater

6.3 V

Sections

2

Triode-Triode

Low-mu twin power triode designed principally for series-regulator service in DC power supplies, with additional high-current pulse applications. Very low plate resistance and high current capability characterize both sections.

Base

8BD

Socket

IO

Heater

6.3 V

Sections

2

Triode-Triode

Low-mu twin power triode designed principally for series-regulator service. Each section combines high current capability, low plate resistance, and approximately 13 W dissipation, while published pulse ratings support additional high-current applications.

Base

8BD

Socket

IO

Heater

6.3 V

Sections

2

Triode-Triode

Low-mu twin power triode developed primarily as a series-pass regulator in DC power supplies. Two high-current sections with very low amplification factor and plate resistance provide effective control elements for stabilized supply circuits.

Base

8BD

Socket

IO

Heater

6.3 V

Sections

2

Triode

Directly heated low-mu audio power triode closely related electrically to the 6A3 but using a 6.3 V filament. It provides several watts of single-ended Class A output and is also suitable for push-pull audio stages.

Base

5S

Socket

IO

Heater

6.3 V

Sections

1

Triode-Triode

Direct-coupled twin-triode power amplifier for Class-A audio-frequency output service, using internally related input and output sections to develop bias and deliver power efficiently.

Base

6AS

Socket

UX6

Heater

6.3 V

Sections

2

Triode

Low-mu high-current power triode intended for electronic voltage-regulator series-pass service. Its low plate resistance and substantial cathode-current capability make it suited to controlling regulated DC supplies rather than conventional voltage amplification.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Russian high-current series-pass regulator power triode; exact variant electrical ratings unverified.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Triode

Low-mu high-current power triode intended for electronic voltage-regulator series-pass service. Its low plate resistance and substantial cathode-current capability make it suited to controlling regulated DC supplies rather than conventional voltage amplification.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Triode

Russian high-current series-pass regulator power triode; variant ratings unverified.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Triode

Duodecal indirectly heated triode designed for audio power-amplifier service, with low plate resistance and published Class A and Class AB1 operating conditions.

Base

Not recorded

Socket

B12C

Heater

6.3 V

Sections

1

Triode

Low-mu high-current power triode intended for electronic voltage-regulator series-pass service. Its low plate resistance and substantial cathode-current capability make it suited to controlling regulated DC supplies rather than conventional voltage amplification.

Base

8JB

Socket

IO

Heater

6.3 V

Sections

1

Triode-Triode

Dual low-mu power triode designed for audio output, with its sections usable in push-pull or parallel Class A service. Published operation at 250 V gives about 1.6 W output with both sections.

Base

7B

Socket

MEDIUM7

Heater

6.3 V

Sections

2