Voltage - Pentode vacuum tubes

Pentode

Low-noise pentode developed specifically for audio preamplification of microphone, pickup, and other weak low-level signals.

Base

RIMLOCK

Socket

B8A

Heater

6.3 V

Sections

1

Pentode

Philips fixed-gain RF and IF amplifier pentode with substantial transconductance and plate-dissipation capability.

Base

RIMLOCK

Socket

B8A

Heater

6.3 V

Sections

1

Pentode

Mullard high-slope RF pentode for demanding radio, radar, television, and wideband signal-amplifier applications.

Base

B9G

Socket

B9G

Heater

6.3 V

Sections

1

Pentode

Special-quality secondary-emission pentode for fast wideband and pulse-amplifier circuits, providing exceptionally high transconductance and signal-current capability.

Base

Not recorded

Socket

B8G

Heater

6.3 V

Sections

1

Pentode

High-transconductance pentode developed for ultra-short-wave RF amplification in demanding VHF receiver and broadband stages.

Base

Not recorded

Socket

B8G

Heater

6.3 V

Sections

1

Pentode

Subminiature high-slope pentode developed primarily for professional industrial amplifier applications.

Base

Not recorded

Socket

WIRE8

Heater

6.3 V

Sections

1

Pentode

Subminiature voltage-amplifying pentode specifically designed for low-microphony applications in sensitive professional equipment.

Base

B8D/F

Socket

WIRE8

Heater

6.3 V

Sections

1

Pentode

Long-life professional RF/IF pentode with stable characteristics for continuously operated communications equipment.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Telefunken low-hum, low-microphony audio pentode designed for sensitive microphone and preamplifier voltage-amplifier stages.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Long-life low-hum, low-noise audio pentode for sensitive professional low-level amplifier service.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Long-life low-noise pentode for high-quality microphone, recording, and precision audio preamplifier stages.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Modern low-noise miniature pentode designed specifically for input stages of sound-recording and sound-reproducing equipment.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Special-quality low-noise pentode for professional audio amplification, combining low noise with unusually strong signal capability.

Base

B9A

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Classic low-noise, low-microphony pentode for microphone, phono, and high-quality audio preamplifier voltage amplification.

Base

NOVAL

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Long-life high-slope RF pentode developed specifically for preamplifiers in long-distance telecommunications equipment.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Secondary-emission pentode for stable wideband amplification, high-speed computer circuits, and high-quality television pulse and signal processing.

Base

Not recorded

Socket

B9G

Heater

6.3 V

Sections

1

Pentode

Heavy-duty high-power pentode with approximately 800 V plate capability and 60 W plate dissipation for specialized power-amplifier service.

Base

Not recorded

Socket

B5

Heater

6.3 V

Sections

1

Pentode

Exceptionally high-slope pentode designed specifically for luminance and video-output stages in color television receivers.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Output pentode rated for approximately 4 W anode dissipation and suitable for RF or AF amplification. Its compact construction supports both radio-frequency and low-frequency power service.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Educational pentode from a four-tube teaching set, designed specifically to demonstrate how electrode grids affect anode-current characteristics.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Pentode developed for RF, IF, and audio-frequency voltage amplification with broad general signal-amplifier usefulness.

Base

Not recorded

Socket

B7G

Heater

12.6 V

Sections

1

Pentode

Directly heated low-voltage battery pentode designed as a high-gain, high-impedance audio voltage amplifier.

Base

Not recorded

Socket

Not recorded

Heater

1.4 V

Sections

1

Pentode

Directly heated Bantam Jr. pentode for high-gain, high-impedance audio voltage amplification in compact battery-powered equipment.

Base

Not recorded

Socket

Not recorded

Heater

1.4 V

Sections

1

Pentode

Series-heater long-life high-slope RF pentode developed for communications preamplifiers and continuous professional service.

Base

Not recorded

Socket

Not recorded

Heater

20 V

Sections

1

Pentode

Directly heated 2 V battery pentode designed for RF and IF amplification in portable radio equipment.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Directly heated Telefunken battery pentode for high-gain RF and IF voltage amplification in portable receivers.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Directly heated 2 V battery pentode for small-signal amplifier service with comparatively strong current capability.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Directly heated battery pentode with relatively low plate resistance and 2.5 W dissipation, favoring more substantial output-amplifier service.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Mullard special-quality rugged RF pentode with statistically controlled characteristics for vibration- and shock-prone professional equipment.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Special-quality low-noise VHF pentode designed for reliable operation under severe vibration and shock.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Special-quality low-noise, low-hum pentode for sensitive professional audio and instrumentation voltage amplification under vibration and shock.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Special-quality rugged dual-control pentode whose additional control electrode supports signal-control functions beyond ordinary amplification.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Directly heated Telefunken RF pentode for VHF amplification down to approximately 1.5-meter wavelength with modest battery consumption.

Base

Not recorded

Socket

Not recorded

Heater

1.9 V

Sections

1

Pentode

Telefunken RF pentode designed for series-heater operation associated with 25 V starter-battery mobile radio equipment.

Base

Not recorded

Socket

P8A

Heater

12.6 V

Sections

1

Pentode

Noval-base plug-in electronic replacement module reproducing the function of a PL802 television pentode; it is not a conventional vacuum tube.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Pentode

Long-life low-noise high-transconductance pentode developed for demanding telecommunications and wideband professional amplifier service.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Long-life voltage-amplifier pentode intended preferably for automatic-bias operation in professional telecommunications equipment.

Base

Not recorded

Socket

Not recorded

Heater

18 V

Sections

1

Pentode

Telefunken space-charge-grid pentode designed for low-voltage high- and low-frequency amplification in military electronic equipment.

Base

Not recorded

Socket

Not recorded

Heater

2.4 V

Sections

1

Pentode

Telefunken space-charge-grid pentode designed for low-voltage high- and low-frequency amplification in military electronic equipment.

Base

Not recorded

Socket

Not recorded

Heater

1.9 V

Sections

1

Pentode

Screened pentode designed specifically for the video-output stage of television receivers. Mazda documentation identifies its principal role as video-frequency amplification and output drive rather than general RF or audio service.

Base

Not recorded

Socket

IO

Heater

4 V

Sections

1

Pentode

Screened pentode designed for television video-output stages. Mazda documentation identifies video-frequency amplification and output drive as its primary application, distinguishing it from ordinary RF or audio signal pentodes.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Pentode

High-slope RF pentode for series-heater equipment. Manufacturer data specify approximately 8.5 mA/V transconductance at the published operating point and identify RF/IF amplifier service in transformerless receiver circuits.

Base

Not recorded

Socket

B8A

Heater

21 V

Sections

1

Pentode

Series-heater low-level audio-frequency pentode designed for resistance-capacitance-coupled AF voltage amplification. Mullard documentation also provides triode-connected operation, but sensitive audio voltage gain is its primary function.

Base

B9A

Socket

B9A

Heater

12.6 V

Sections

1

Pentode

Mazda special-purpose vacuum tube whose supplied sheet is image-only and does not provide sufficiently reliable readable technical text. Its precise functional role cannot be determined confidently from the available source, so classification remains conservative.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Pentode

Low-noise, low-microphonic screened RF pentode. Mazda documentation emphasizes reduced noise and mechanical sensitivity, making it particularly suited to sensitive radio-frequency signal stages where unwanted noise and vibration response must be minimized.

Base

Not recorded

Socket

B7

Heater

4 V

Sections

1

Pentode

Indirectly heated pentode for RF, IF, and AF amplification, with documented triode-connected operation for low-resistance audio service. Its broad signal-amplifier capability spans receiver and audio-frequency stages.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Frame-grid television IF-amplifier pentode documented by Amperex. Its specialized grid construction provides high transconductance for television intermediate-frequency amplification and other demanding wideband signal stages.

Base

Not recorded

Socket

B9A

Heater

4.4 V

Sections

1

Pentode

Frame-grid television IF-amplifier pentode documented by Amperex. Its frame-grid construction and high transconductance are optimized for television intermediate-frequency and related wideband signal amplification.

Base

Not recorded

Socket

B9A

Heater

4.4 V

Sections

1