Voltage Pentode vacuum tubes

Pentode

Russian pentode documented in bilingual manufacturer literature. The available source establishes its pentode construction and published guaranteed characteristics, but provides insufficient explicit application wording to assign a more specialized functional category conservatively.

Base

Not recorded

Socket

B8G

Heater

10 V

Sections

1

Pentode

Russian pentode documented in bilingual manufacturer literature with guaranteed electrical characteristics. The available source establishes signal-tube operation but does not provide enough explicit functional wording to support a narrower classification without inference.

Base

Not recorded

Socket

B8G

Heater

10 V

Sections

1

Pentode

Russian pentode documented in bilingual manufacturer literature with guaranteed electrical characteristics. The surviving source information establishes pentode operation but does not clearly identify a specialized application or cutoff class.

Base

Not recorded

Socket

B8G

Heater

12.6 V

Sections

1

Pentode

Russian pentode designed for reliable operation under ambient influences, with a manufacturer service-life guarantee of 3,000 hours. Published data describe a signal-amplifier pentode with conventional voltage-amplification operating characteristics.

Base

Not recorded

Socket

B8G

Heater

12.6 V

Sections

1

Pentode

Philips professional pentode designed for long-life telephone-equipment service. Its intended role is reliable small-signal amplification in communications installations where extended operating life is more important than consumer-receiver convenience.

Base

Not recorded

Socket

M7A

Heater

4 V

Sections

1

Pentode

Philips professional pentode designed for long-life telephone-equipment service. Manufacturer documentation places it in reliable communications signal amplification, emphasizing extended service life for continuously operated telephone installations.

Base

Not recorded

Socket

M7A

Heater

21 V

Sections

1

Pentode

Philips professional pentode designed for long-life telephone-equipment service. Its manufacturer documentation emphasizes dependable small-signal operation in communications installations requiring extended service life and professional reliability.

Base

Not recorded

Socket

B9A

Heater

18 V

Sections

1

Pentode

Philips professional signal pentode with published heater, capacitance, characteristic, operating-condition, and limiting-value data. The available source supports general professional signal amplification but does not clearly establish a narrower functional category.

Base

Not recorded

Socket

B8G

Heater

20 V

Sections

1

Pentode

Special-quality Philips C3m pentode for AF, IF, RF, oscillator, and output service. Manufacturer documentation specifies a 10,000-hour life test, making extended professional service life a defining feature of this versatile signal and low-power output tube.

Base

Not recorded

Socket

B8G

Heater

20 V

Sections

1

Pentode

Directly heated pentode for radio-frequency and intermediate-frequency amplification in battery receivers. RCA designed it as a low-power signal tube for portable battery-operated radio equipment rather than an output-stage device.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Economical directly heated subminiature Russian pentode for high- and intermediate-frequency amplification. Its compact filamentary construction targets miniature RF/IF signal equipment where low power consumption and small size are desirable.

Base

Not recorded

Socket

Not recorded

Heater

1.2 V

Sections

1

Pentode

Directly heated receiving pentode intended for general amplifier service in low-voltage battery equipment.

Base

Not recorded

Socket

UX4

Heater

2 V

Sections

1

Pentode

Directly heated Radiotron pentode for battery-powered Class A voltage amplification, using a 2 V, 120 mA coated filament. Can operate with screen and plate interconnected without creating an additional physical triode.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Russian miniature directly heated low-power pentode for mobile electronics, using a 1.25 V, 11 mA oxide-coated filament and flexible leads.

Base

Not recorded

Socket

Not recorded

Heater

1.25 V

Sections

1

Pentode

Directly heated power-amplifier pentode designed for battery-operated receiver output service with published Class-A operating conditions.

Base

5BZ

Socket

B7G

Heater

1.4 V

Sections

1

Pentode

Directly heated pentode for oscillation, amplification and mixing.

Base

Not recorded

Socket

Not recorded

Heater

1.2 V

Sections

1

Pentode

Low-consumption directly heated pentode for mixing and amplification.

Base

Not recorded

Socket

Not recorded

Heater

1.2 V

Sections

1

Pentode

Series-heater screened pentode designed for television receiver amplification service.

Base

Not recorded

Socket

Not recorded

Heater

11 V

Sections

1

Pentode

Cossor receiving pentode intended for receiver and amplifier service; available source does not clearly support a narrower functional category.

Base

Not recorded

Socket

B7

Heater

2 V

Sections

1

Pentode

Cossor receiving pentode intended for receiver and amplifier service; available source does not clearly support a narrower functional category.

Base

Not recorded

Socket

B7

Heater

2 V

Sections

1

Pentode

Cossor receiving pentode intended for receiver and amplifier service; available source does not clearly support a narrower functional category.

Base

Not recorded

Socket

B5

Heater

2 V

Sections

1

Pentode

Receiving pentode amplifier documented in Cunningham/RCA literature; available source does not clearly establish a narrower dominant function.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Western Electric heater-cathode general-purpose suppressor-grid pentode intended for general electronic amplification.

Base

Not recorded

Socket

MEDIUM5

Heater

2 V

Sections

1

Pentode

Pentode designed specifically for transitron circuits in television receivers, with ratings and capacitances tailored to that oscillator/control technique.

Base

E9-1

Socket

B9A

Heater

2.5 V

Sections

1

Pentode

Russian pentode documented in technical reference literature; available source does not clearly establish a narrower specialized application.

Base

Not recorded

Socket

Not recorded

Heater

2.4 V

Sections

1

Pentode

Directly heated Russian low-power pentode designed for RF power amplification and oscillator service to approximately 120 MHz.

Base

Not recorded

Socket

B9A

Heater

2.2 V

Sections

1

Pentode

High-slope screened HF pentode designed as a straight television amplifier in AC/DC series-heater receivers.

Base

B9A

Socket

B9A

Heater

7.3 V

Sections

1

Pentode

Western Electric heater-cathode general-purpose pentode designed for voltage amplification.

Base

7K

Socket

OCTAL7

Heater

10 V

Sections

1

Pentode

Western Electric heater-cathode general-purpose pentode designed for voltage amplification.

Base

Not recorded

Socket

OCTAL6

Heater

10 V

Sections

1

Pentode

Western Electric heater-cathode suppressor-grid pentode designed for general-purpose voltage amplification.

Base

Not recorded

Socket

OCTAL6

Heater

7.5 V

Sections

1

Pentode

Western Electric heater-cathode suppressor-grid pentode intended for general-purpose electronic amplification.

Base

Not recorded

Socket

OCTAL6

Heater

10 V

Sections

1

Pentode

Western Electric heater-cathode general-purpose pentode with a 275-volt maximum plate rating.

Base

Not recorded

Socket

OCTAL7

Heater

6.3 V

Sections

1

Pentode

Western Electric oxide-filament general-purpose pentode intended for electronic amplification.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Miniature Western Electric pentode with published Class-A characteristics, intended for low-level amplifier service.

Base

Not recorded

Socket

UX4

Heater

6.3 V

Sections

1

Pentode

Octal-base Western Electric pentode with published Class-A characteristics, intended for low-level amplifier service.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Miniature high-transconductance Western Electric pentode intended for voltage-amplifier service.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Rugged indirectly heated miniature pentode.

Base

Not recorded

Socket

Not recorded

Heater

3.15 V

Sections

1

Pentode

Rugged indirectly heated miniature pentode.

Base

Not recorded

Socket

Not recorded

Heater

3.15 V

Sections

1

Pentode

Long-life high-transconductance miniature pentode for professional RF and broadband amplification, developed as a durable communications-service replacement.

Base

E7-1

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Low-noise frame-grid pentode developed for UHF and broadband professional amplification, combining very high transconductance with low capacitances.

Base

E9-1

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Directly heated subminiature electrometer pentode designed specifically for pH meters and other extremely high-impedance measurement circuits.

Base

Not recorded

Socket

B8D

Heater

0.5 V

Sections

1

Pentode

Miniature triple-grid pentode for low-power HF/UHF applications, with independently controllable suppressor grid supporting gating, mixing, and modulation.

Base

E7-1

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Professional carrier-frequency pentode designed for telecommunications amplifier service rather than ordinary consumer-radio applications.

Base

Not recorded

Socket

UX6

Heater

10 V

Sections

1

Pentode

Carrier-frequency pentode intended for professional telecommunications amplification with operating characteristics optimized for dependable communications service.

Base

Not recorded

Socket

UX6

Heater

10 V

Sections

1

Pentode

Professional 4328-family carrier-frequency pentode designed for dependable telecommunications amplifier service.

Base

Not recorded

Socket

UX6

Heater

7.5 V

Sections

1

Pentode

Long-life RF pentode designed for amplifier service from low through very high frequencies, including operation from comparatively low supply voltages.

Base

E7-1

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Rugged premium subminiature pentode developed for broadband radar and video amplification in military, airborne, and industrial equipment.

Base

8DL

Socket

SUBMINIATURE8

Heater

6.3 V

Sections

1

Pentode

Early triple-grid pentode designed for radio detector and high-gain voltage-amplifier service, with both pentode and triode-connected operating data.

Base

6F

Socket

UX6

Heater

2.5 V

Sections

1