Power - Pentode (NOT beam) vacuum tubes

Pentode

Directly heated Raytheon subminiature power-amplifier pentode with a 1.25 V, 50 mA filament and typical 22.5 V plate supply. Designed for miniature battery equipment.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated Raytheon subminiature power-amplifier pentode using a 1.25 V, 20 mA filament and typical 22.5 V plate supply. Optimized for very low heater drain.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated Raytheon subminiature power-amplifier pentode using a 1.25 V, 30 mA filament and typical 22.5 V plate supply. Designed for compact portable output stages.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated Raytheon subminiature power-amplifier pentode with a 1.25 V, 30 mA filament and typical 15 V plate operation. Intended for exceptionally low-voltage portable equipment.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated Raytheon subminiature power-amplifier pentode using a 1.25 V, 20 mA filament and typical 22.5 V plate supply. Its low drain suits miniature battery-powered electronics.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated subminiature power pentode designed for portable and wearable equipment. Its compact construction and low filament demand support miniature battery-operated output stages.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated Raytheon subminiature power-amplifier pentode using a 1.25 V, 15 mA filament and typical 22.5 V plate supply, emphasizing exceptionally low battery drain.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated subminiature battery power pentode using a 1.25 V, 20 mA filament and approximately 22.5 V plate supply.

Base

5E

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Very-low-voltage directly heated subminiature power pentode operating from roughly 15 V with a 20 mA filament.

Base

5E

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated Raytheon subminiature power pentode for ultra-low-voltage battery amplification around 15 V.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Extremely low-drain subminiature battery power pentode using a 1.25 V, 15 mA filament and approximately 22.5 V plate supply.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated subminiature pentode for low-power output amplification in portable battery equipment.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated Raytheon subminiature power pentode emphasizing low filament drain and compact battery operation.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Ultra-low-drain subminiature power pentode requiring only 15 mA from its 1.25 V filament.

Base

5E

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated subminiature power pentode for compact low-power battery amplifier service.

Base

5E

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Extremely low-drain subminiature power pentode using a 1.25 V, 15 mA filament.

Base

5J

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Directly heated subminiature battery power pentode optimized for minimum heater consumption.

Base

5J

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Subminiature battery power pentode for wearable equipment, producing roughly 3.75 mW from approximately 22.5 V.

Base

5J

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Special S1 version of CK542DX retaining its ultra-low-voltage battery power-amplifier characteristics.

Base

5J

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Extremely low-current subminiature power pentode producing sub-milliwatt output from approximately 30 V.

Base

5J

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Subminiature battery power pentode producing roughly 1.75 mW from approximately 22.5 V.

Base

5J

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Directly heated subminiature power pentode for portable and wearable equipment with milliwatt-level output.

Base

5J

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Very-low-power battery pentode producing approximately 2 mW from a 22.5 V supply.

Base

5J

Socket

B5D

Heater

1.25 V

Sections

1

Pentode

Raytheon subminiature battery power pentode producing roughly 9.5 mW from approximately 45 V.

Base

5J

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated subminiature output pentode providing roughly 50 mW from a 45 V battery supply.

Base

5L

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Very-low-power subminiature battery pentode producing approximately 9.5 mW at 45 V.

Base

5F

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Subminiature battery power pentode providing roughly 80 mW from a 67.5 V plate supply.

Base

5F

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Extremely low-drain subminiature power pentode with a remarkable 1.25 V, 10 mA filament for wearable electronics.

Base

Not recorded

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Early Philips directly heated three-grid battery output pentode for audio amplification from approximately 50–150 V supplies.

Base

Not recorded

Socket

Not recorded

Heater

1 V

Sections

1

Pentode

Centre-tapped-filament battery output pentode designed for Class-A audio service. Its filament arrangement provides flexibility for portable receiver power supplies while delivering low-frequency output power.

Base

Not recorded

Socket

IO

Heater

2.8 V

Sections

1

Pentode

Battery output pentode designed for Class-A audio service. Its directly heated construction supports efficient low-frequency power amplification in portable receiving equipment.

Base

Not recorded

Socket

IO

Heater

1.4 V

Sections

1

Pentode

Subminiature 90 V battery output pentode designed for either single-ended or push-pull service. Its compact construction provides useful audio output power in miniature portable equipment.

Base

Not recorded

Socket

WIRE8

Heater

1.25 V

Sections

1

Pentode

Subminiature hearing-aid output pentode designed for operation from approximately 15 V HT supplies. Its extremely low-power construction provides audio output in miniature personal equipment.

Base

Subminiature

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Subminiature hearing-aid output pentode using a 1.25 V, 15 mA filament and direct-soldered wire leads. Designed for extremely compact, low-drain personal audio equipment.

Base

Subminiature

Socket

WIRE8

Heater

1.25 V

Sections

1

Pentode

Subminiature 90 V battery output pentode. Designed for compact portable audio equipment, it provides low-frequency output power from conventional battery-receiver supply voltages.

Base

Not recorded

Socket

WIRE8

Heater

1.25 V

Sections

1

Pentode

Subminiature VHF output pentode designed for battery communications equipment. It provides radio-frequency power at VHF while retaining the low filament demand required by portable systems.

Base

Not recorded

Socket

WIRE8

Heater

1.25 V

Sections

1

Pentode

Subminiature output pentode with a 1.25 V, 25 mA filament for very-low-power Class-A audio service. Its compact construction targets miniature battery-operated equipment.

Base

Subminiature

Socket

WIRE8

Heater

1.25 V

Sections

1

Pentode

Subminiature output pentode with a 1.25 V, 25 mA filament for low-voltage Class-A audio amplification. Designed for compact portable equipment requiring minimal heater power.

Base

Subminiature

Socket

WIRE8

Heater

1.25 V

Sections

1

Pentode

Subminiature VHF output pentode designed also for frequency-multiplier service. Its compact battery-oriented construction provides RF power generation and harmonic multiplication at high frequencies.

Base

Not recorded

Socket

WIRE8

Heater

1.25 V

Sections

1

Pentode

Special-quality high-slope output pentode for industrial applications, with documented Class-A and push-pull Class-AB operation. It combines professional reliability with substantial power-amplifier capability.

Base

Octal

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Rugged long-life Telefunken power pentode designed for high-current service, including approximately 30 W push-pull Class-B operation. Its professional construction emphasizes durability and sustained high-power output.

Base

Octal

Socket

IO

Heater

6.3 V

Sections

1

Pentode

E34L/EL34-family audio-frequency output pentode. Manufacturer documentation identifies it as a dedicated power-output tube for low-frequency amplifier stages.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Power/output pentode designed for audio-frequency power amplification in single-ended or push-pull output stages.

Base

Not recorded

Socket

B4

Heater

4 V

Sections

1

Pentode

Power/output pentode designed for audio-frequency power amplification in single-ended or push-pull output stages.

Base

Not recorded

Socket

B4

Heater

4 V

Sections

1

Pentode

Power/output pentode designed for audio-frequency power amplification in single-ended or push-pull output stages.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

1

Pentode

Special-quality long-life power/output pentode designed for stable professional, industrial, or wideband amplifier service.

Base

NOVAL

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Special-quality long-life power/output pentode designed for stable professional, industrial, or wideband amplifier service.

Base

Noval

Socket

B9A

Heater

6.3 V

Sections

1

Diode-Diode-Pentode

Combination valve incorporating a power-output pentode with diode or triode sections for audio-frequency amplification, detection, or driver service.

Base

Not recorded

Socket

SIDE8

Heater

6.3 V

Sections

3