Voltage - Pentode Sharp Cutoff (single) vacuum tubes

Pentode

Sharp-cutoff pentode designed for low-level audio-amplifier input stages in public-address, recording, and audio equipment.

Base

9AD

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff pentode designed for RF, VHF/UHF, wide-band, or voltage-amplifier service.

Base

8DL

Socket

B8D

Heater

26.5 V

Sections

1

Pentode

Sharp-cutoff pentode designed for television IF, picture-IF, video, or VHF tuner amplifier service.

Base

7CM

Socket

B7G

Heater

5.6 V

Sections

1

Pentode

Sharp-cutoff pentode designed for television IF, picture-IF, video, or VHF tuner amplifier service.

Base

Not recorded

Socket

B9A

Heater

4.9 V

Sections

1

Pentode

Sharp-cutoff pentode designed for RF, VHF/UHF, wide-band, or voltage-amplifier service.

Base

E7-1

Socket

B7G

Heater

20 V

Sections

1

Pentode

Premium sharp-cutoff amplifier pentode documented by Amperex and other manufacturers. Its special-quality construction supports dependable fixed-gain signal amplification, with published ratings and characteristics for professional electronic service.

Base

9BJ

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Ruggedized sharp-cutoff miniature pentode for high-frequency wide-band radar and IF service in military and industrial airborne equipment. Low heater drain, high transconductance, and low capacitances support demanding broadband amplification.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff pentode designed for wide-band amplifier service with rugged heater-cathode construction. Its fixed-gain characteristic and strengthened internal design suit professional broadband signal equipment.

Base

8N

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Ruggedized sharp-cutoff RF/IF pentode designed for dependable high-frequency signal amplification. Manufacturer documentation emphasizes strengthened construction for professional or demanding-service receiver stages.

Base

E7-1

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Lock-In sharp-cutoff pentode amplifier designed for electronic-computer service. Its fixed-gain signal-amplifier function is combined with Lock-In construction for reliable operation in early electronic computing equipment.

Base

8V

Socket

B8G

Heater

6.3 V

Sections

1

Pentode

Seven-pin miniature sharp-cutoff pentode, co-designated with 6AG5WA. Designed for dependable high-frequency amplification, it combines compact construction with special-service characteristics for professional electronic equipment.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Premium ruggedized dual-control pentode for converter, modulator, gating, and AF, IF, or RF amplifier applications. Its independently connected suppressor grid acts as a second control electrode, enabling mixing and switching in demanding airborne equipment.

Base

7CM

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff subminiature high-frequency pentode. Its compact construction and fixed-gain RF characteristics suit miniature signal-amplifier stages where small physical size and high-frequency operation are important.

Base

8DC

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Rugged subminiature sharp-cutoff RF pentode developed by Sonotone for circuits subjected to severe shock and vibration. Eight flexible leads, 6.3 V/175 mA heater, and controlled electrical tolerances support dependable high-frequency amplification.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Special sharp-cutoff RF pentode designed for Class A high-frequency amplification. Its abrupt transfer characteristic provides fixed gain in RF signal stages rather than variable-mu automatic-gain-control operation.

Base

7CM

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

High-transconductance sharp-cutoff pentode designed for wide-band and IF amplification. Its substantial transconductance provides strong fixed-gain signal amplification across broad frequency ranges.

Base

7BK

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Reliable Bendix Red Bank miniature dual-control sharp-cutoff RF pentode for aircraft and industrial applications. Extensive run-in and rugged construction target low early-failure rates, long service life, and uniform characteristics.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Reliable hard-glass Bendix miniature dual-control pentode with a published 10,000-hour life expectancy. Designed for demanding professional service, it combines dual-control operation with long-life, high-reliability construction.

Base

E9-1

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Rugged sharp-cutoff subminiature pentode designed for RF amplifier service under severe environmental conditions. Its compact construction combines fixed-gain high-frequency amplification with enhanced mechanical durability.

Base

Not recorded

Socket

SUBMINIATURE8

Heater

6.3 V

Sections

1

Pentode

Reliable miniature sharp-cutoff RF pentode designed for aircraft and industrial applications. Bendix construction emphasizes dependable fixed-gain high-frequency amplification in equipment where early failure and environmental stress are important concerns.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Miniature hard-glass sharp-cutoff RF pentode from Bendix. Its professional construction supports fixed-gain high-frequency signal amplification in applications requiring durable miniature tube construction.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Industrial sharp-cutoff pentode designed for RF amplification in mobile and high-frequency wide-band equipment. Low heater-current drain supports communications equipment where power consumption and broadband signal performance are both important.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff pentode designed for mobile-communications RF and IF amplifier service. Its fixed-gain high-frequency characteristics suit professional communications equipment rather than automatic-gain-controlled remote-cutoff stages.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Professional small-signal pentode for conventional voltage-amplifier service, without a more specialized detector, output, or power function.

Base

7BD

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff RF pentode using a 6.3 V, 0.15 A heater. Manufacturer handbook data document fixed-gain high-frequency amplification with relatively low heater-current demand.

Base

7BD

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff RF pentode using a 6.3 V, 0.3 A heater. Manufacturer handbook data provide ratings and representative operating characteristics for fixed-gain high-frequency signal amplification.

Base

9X

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Rugged subminiature sharp-cutoff RF pentode designed for guided-missile service under high altitude, shock, vibration, and high temperature. It combines compact RF amplification with exceptional environmental durability.

Base

Not recorded

Socket

B8D

Heater

6.3 V

Sections

1

Pentode

High-transconductance sharp-cutoff pentode designed for wide-band voltage amplification. Its substantial transconductance and fixed-control characteristic suit broadband RF, IF, and video-frequency signal stages.

Base

8N

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff pentode with high transconductance for wide-band amplification. The GT-envelope version provides fixed-gain broadband signal performance in tubular glass construction.

Base

B8-26

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Premium RCA sharp-cutoff pentode designed for military and critical industrial applications. It combines high-performance fixed-gain amplification with special-quality construction for equipment requiring increased reliability.

Base

8N

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff miniature pentode designed for compact RF or IF amplification to approximately 400 MHz. Its small size and high-frequency capability make it a versatile fixed-gain VHF signal tube.

Base

E7-1

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Special-service sharp-cutoff seven-pin miniature pentode co-designated 6186. It retains the high-frequency fixed-gain amplifier function of the 6AG5 family with construction intended for more demanding professional service.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Very-high-transconductance sharp-cutoff miniature pentode designed for voltage-amplifier service. Its high slope provides substantial fixed gain for demanding high-frequency and broadband signal stages.

Base

E7-1

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Rugged high-slope, low-cutoff pentode designed for wide-band RF amplifier circuits. It combines substantial transconductance with strengthened construction for demanding broadband high-frequency service.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

High-transconductance sharp-cutoff pentode designed for wide-band and video amplification. Its substantial slope and fixed-control characteristic provide strong broadband gain for demanding signal stages.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff miniature pentode voltage amplifier with low capacitance and high input impedance. Its electrical characteristics support fixed-gain high-frequency signal amplification with reduced circuit loading.

Base

7BD

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

High-transconductance RF pentode intended for fixed-gain Class-A amplifier service in professional high-frequency equipment.

Base

8N

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Miniature high-frequency pentode designed for low-noise RF and IF voltage amplification. Its compact construction and reduced noise make it particularly useful in sensitive receiver front-end signal stages.

Base

7BD

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Ruggedized special-quality sharp-cutoff pentode for wideband radar, RF, and IF amplification in military and airborne equipment.

Base

7BD

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

High-slope miniature pentode for wideband RF, IF, and video-frequency amplification in communications and television equipment.

Base

7DB

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Dual-control sharp-cutoff pentode for converter, modulator, gating, and amplifier applications. Its broad industrial and communications use is not specifically centered on radio detection or superheterodyne frequency conversion.

Base

E7-1

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Ruggedized dual-control sharp-cutoff pentode for converter, modulator, gating, and AF/IF/RF amplification in military and industrial equipment. Its broad control applications outweigh any single radio-converter role.

Base

7CM

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Fixed-slope sharp-cutoff pentode for general RF voltage amplification in receiver and electronic equipment.

Base

7BK

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff 6AU6-family pentode for fixed-gain RF and IF voltage amplification.

Base

7BK

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Ruggedized 6AU6-family sharp-cutoff RF pentode for mobile, aeronautical, industrial, and vibration-prone equipment.

Base

7BK

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

High-reliability rugged 6AU6-family RF pentode designed for shock, vibration, and repeated heater cycling.

Base

7BK

Socket

B7G

Heater

6.3 V

Sections

1

Pentode-Triode

High-mu triode plus sharp-cutoff pentode for television IF, video, AGC/reactance, oscillator, sync, and phase-splitter circuits.

Base

9DX

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Triode-pentode designed for television video-amplifier and sync-separator service, combining video gain and synchronization functions in one envelope.

Base

9AE

Socket

B9A

Heater

6.3 V

Sections

2