Power - Pentode (NOT beam) vacuum tubes

Diode-Diode-Pentode

Combination double-diode output pentode integrating detector or AVC diode functions with an audio power-output pentode.

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Socket

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Heater

40 V

Sections

3

Pentode-Pentode

PLL80/12HU8-family output pentode; available source lacks enough detail for a narrower functional assignment.

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Socket

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Heater

12 V

Sections

2

Pentode

Directly heated 2 V battery power pentode providing approximately 300 mW Class A audio output.

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Socket

B4

Heater

2 V

Sections

1

Pentode

Series-heater output pentode developed for efficient audio amplification from unusually low anode voltages.

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Socket

B6

Heater

40 V

Sections

1

Pentode

Marconi RF transmitting pentode for oscillator, power-amplifier, frequency-multiplier, and telephony service.

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Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Early OSRAM directly heated battery-era power pentode for receiver audio output.

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Socket

B5

Heater

2 V

Sections

1

Pentode

Early Marconi directly heated output pentode developed to provide greater audio power than the PT2.

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Socket

B5

Heater

2 V

Sections

1

Pentode

High-efficiency Marconi power pentode for substantial Class A audio output.

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Socket

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Heater

4 V

Sections

1

Pentode

Directly heated Marconi power pentode for early audio-output service.

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Socket

B5

Heater

4 V

Sections

1

Pentode

Cossor power pentode for substantial receiver, public-address, and general audio-output amplification.

Base

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Socket

B5

Heater

4 V

Sections

1

Pentode

Marconi power pentode for receivers using a single low-frequency stage, combining gain and output capability.

Base

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Socket

B5

Heater

4 V

Sections

1

Pentode

Marconi super-power pentode for higher-output audio service at anode voltages to approximately 250 V.

Base

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Socket

B5

Heater

6 V

Sections

1

Pentode-Pentode

Matched double pentode designed for quiescent push-pull battery-receiver output stages, with individually identified sections for balanced audio power operation.

Base

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Socket

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Heater

2 V

Sections

2

Pentode-Pentode

Battery double-pentode output valve for quiescent push-pull audio service, combining two matched power pentode sections in one envelope.

Base

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Socket

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Heater

2 V

Sections

2

Pentode

Telefunken series-heater output pentode providing approximately 1 W audio power in transformerless receivers.

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Socket

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Heater

4 V

Sections

1

Pentode

Telefunken output pentode for conventional audio-frequency power amplification in early radio equipment.

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Socket

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Heater

4 V

Sections

1

Pentode

Telefunken battery output pentode for low-frequency power service in portable receivers.

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Socket

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Heater

4 V

Sections

1

Pentode

Telefunken battery output pentode designed to provide useful audio power from comparatively low anode voltage.

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Socket

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Heater

2 V

Sections

1

Pentode

Telefunken battery audio-frequency output pentode designed for receiver loudspeaker service. Its low-power directly heated construction provides useful audio output in portable battery equipment.

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Socket

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Heater

4 V

Sections

1

Pentode

Telefunken high-power screen-grid output pentode designed for audio-frequency amplification. Its power construction supports substantial low-frequency loudspeaker drive in receiver and amplifier output stages.

Base

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Socket

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Heater

4 V

Sections

1

Pentode

Raytheon power pentode designed for RF amplification, oscillation, modulation, and frequency-multiplier service. Its transmitting construction supports multiple radio-frequency generation and power functions.

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Socket

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Heater

7.5 V

Sections

1

Pentode

Raytheon power pentode for RF amplification, oscillator, modulation, and frequency-multiplier service. Designed as a versatile transmitting tube for amateur and professional radio-frequency equipment.

Base

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Socket

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Heater

7.5 V

Sections

1

Pentode

Heater-type pentode RF power amplifier and oscillator designed for amateur transmitting service. Its construction supports both radio-frequency generation and transmitter output amplification.

Base

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Socket

MEDIUM5

Heater

6.3 V

Sections

1

Pentode

Raytheon transmitting pentode designed for RF power and suppressor-grid modulation service. Manufacturer tables provide transmitting electrode voltages, currents, dissipation, power, and capacitance data.

Base

7-Pin

Socket

MEDIUM7

Heater

6.3 V

Sections

1

Pentode

Heater-type pentode RF power amplifier and oscillator with alternate base construction. It retains the transmitting and radio-frequency generation functions of the RK25 family.

Base

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Socket

MEDIUM5

Heater

6.3 V

Sections

1

Pentode

Directly heated thoriated-tungsten pentode designed for RF power amplification and oscillator service. Its filamentary transmitting construction supports substantial radio-frequency output.

Base

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Socket

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Heater

10 V

Sections

1

Pentode

Heater-type transmitting pentode designed for RF power-amplifier and oscillator service. It combines radio-frequency generation and output amplification in professional or amateur transmitters.

Base

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Socket

MEDIUM7

Heater

12.6 V

Sections

1

Pentode

Heater-type power pentode designed for amplifier, oscillator, and modulator service. Its transmitting construction supports RF generation, output power, and modulation functions.

Base

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Socket

MEDIUM5

Heater

12.6 V

Sections

1

Pentode

Directly heated pentode power amplifier designed for RF amplification, oscillator, frequency-multiplier, and modulation service. A versatile transmitting tube for multiple radio-frequency functions.

Base

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Socket

MEDIUM5

Heater

12.6 V

Sections

1

Pentode

Raytheon transmitting pentode intended for RF oscillator-amplifier service. Manufacturer documentation provides transmitting maximum ratings and capacitances for radio-frequency power generation and amplification.

Base

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Socket

MEDIUM5

Heater

5.5 V

Sections

1

Pentode

Raytheon RF pentode designed for oscillator-amplifier transmitting service. Published maximum ratings and capacitances establish its role as a radio-frequency power and generation tube.

Base

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Socket

MEDIUM7

Heater

12.6 V

Sections

1

Pentode

German transmitting pentode with published electrical ratings and operating conditions. Designed for professional radio-frequency power service in communications and military-era transmitting equipment.

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Socket

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Heater

12.6 V

Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating data. Manufacturer documentation establishes radio-frequency power output service in professional transmitter equipment.

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Socket

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Heater

12.6 V

Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating conditions. Its construction and ratings support substantial radio-frequency power service in professional transmitting equipment.

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Socket

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Heater

12.6 V

Sections

1

Pentode

Directly heated transmitting power pentode with approximately 20 W plate dissipation, designed for short-wave RF service to about 60 MHz. Intended for oscillator or power-amplifier applications.

Base

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Socket

B9G

Heater

2.4 V

Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating data. Its manufacturer documentation identifies professional radio-frequency power service rather than receiver small-signal operation.

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Socket

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Heater

2.4 V

Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating conditions. Designed for professional RF power generation or amplification in transmitter equipment.

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Socket

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Heater

2.2 V

Sections

1

Pentode

German transmitting pentode with manufacturer-published limiting ratings and operating data. Its construction supports radio-frequency power service in professional transmitting equipment.

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Socket

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Heater

1.7 V

Sections

1

Pentode

Transmitting power pentode with approximately 40 W plate dissipation for RF oscillator, frequency-multiplier, and power-amplifier service to about 120 MHz.

Base

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Socket

GU50

Heater

12.6 V

Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating data. Manufacturer documentation establishes substantial radio-frequency power service in professional transmitter equipment.

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Socket

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Heater

4.2 V

Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating conditions. Its construction and ratings identify it as a professional RF power tube.

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Socket

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Heater

3.3 V

Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating data. Designed for professional radio-frequency power generation or amplification rather than receiving service.

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Socket

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Heater

48 V

Sections

1

Pentode

Transmitting pentode with approximately 65 W plate dissipation for radio-frequency oscillator and power-amplifier service. Its substantial dissipation supports medium-power professional transmitting applications.

Base

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Socket

B4

Heater

10 V

Sections

1

Pentode

Siemens power pentode documented in professional transmitting-tube literature. The available source establishes pentode construction, but provides limited extracted application wording beyond its transmitter-class context.

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Socket

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Heater

6.3 V

Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating data. Manufacturer documentation establishes professional radio-frequency power service in transmitter equipment.

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Heater

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Sections

1

Pentode

German transmitting pentode with published limiting ratings and operating conditions. Its construction and electrical ratings support professional radio-frequency power generation or amplification.

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Socket

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Heater

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Sections

1

Pentode

High-transconductance RFT transmitting pentode for HF/VHF driver and final stages to approximately 150 MHz.

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Socket

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Heater

6.3 V

Sections

1

Pentode

RFT transmitting pentode for audio-frequency, radio-frequency, and pulse operation to approximately 65 MHz.

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Socket

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Heater

12.6 V

Sections

1