Voltage - Pentode Remote Cutoff (single) vacuum tubes

Pentode

Variable-mu high-frequency pentode for gain-controlled RF amplification in AM/FM receivers using 100 mA series-connected heater chains.

Base

Not recorded

Socket

B9A

Heater

13 V

Sections

1

Pentode

Remote-cutoff RF pentode for gain-controlled RF and IF amplification, providing smooth automatic-gain-control action in receiving equipment.

Base

NOVAL

Socket

B9A

Heater

12.6 V

Sections

1

Pentode

Remote-cutoff RF pentode for gain-controlled small-signal RF or IF amplifier service in series-heater receiving equipment.

Base

Not recorded

Socket

B9A

Heater

12.6 V

Sections

1

Pentode

Remote-cutoff lock-in pentode for gain-controlled RF and IF voltage amplification in AC/DC receivers with series-string heaters.

Base

8V

Socket

B8G

Heater

12.6 V

Sections

1

Pentode

Metal remote-cutoff pentode for RF voltage amplification, combining variable-mu gain control with a 12.6 V series heater.

Base

Not recorded

Socket

B8G

Heater

12.6 V

Sections

1

Pentode

Variable-mu miniature pentode for RF and IF amplification in AC/DC receivers, providing a broad useful AGC range.

Base

7CC

Socket

B7G

Heater

12.6 V

Sections

1

Pentode

Miniature remote-cutoff pentode designed specifically for RF and IF amplification with automatic gain control.

Base

Not recorded

Socket

B7G

Heater

12.6 V

Sections

1

Pentode

Semiremote-cutoff pentode developed for gain-controlled television video-IF amplification, combining high transconductance with stable wideband AGC operation.

Base

7CM

Socket

B7G

Heater

12.6 V

Sections

1

Pentode

Remote-cutoff high-frequency pentode for RF voltage amplification, providing gradual gain reduction for automatic gain-control circuits.

Base

Not recorded

Socket

Not recorded

Heater

12.6 V

Sections

1

Pentode

Variable-mu RF pentode for gain-controlled RF and IF amplification with reduced distortion and cross-modulation.

Base

Not recorded

Socket

Not recorded

Heater

12.6 V

Sections

1

Pentode

Glass-tubular variable-mu RF pentode for receiver RF/IF stages requiring extended cutoff and automatic volume control.

Base

7R

Socket

IO

Heater

12.6 V

Sections

1

Pentode

Semi-remote-cutoff high-transconductance pentode for RF/IF voltage amplification with controlled gain and reduced high-frequency cathode coupling.

Base

8BK

Socket

IO

Heater

12.6 V

Sections

1

Pentode

Variable-mu pentode designed for AVC-controlled RF and IF amplification with broad gain reduction and reduced cross-modulation.

Base

8N

Socket

IO

Heater

12.6 V

Sections

1

Pentode

Glass-tubular variable-mu pentode for automatic-gain-controlled RF and IF receiver amplification in series-string equipment.

Base

8N

Socket

IO

Heater

12.6 V

Sections

1

Pentode

Cossor variable-mu high-frequency pentode designed for RF and IF amplification under automatic volume control.

Base

Not recorded

Socket

B7

Heater

13 V

Sections

1

Pentode

Variable-mu lock-in pentode for gain-controlled RF/IF voltage amplification in AC/DC receivers.

Base

8V

Socket

LOCTAL8

Heater

12.6 V

Sections

1

Pentode

High-slope variable-mu pentode for RF and IF amplification, combining strong gain with extended-cutoff automatic gain control.

Base

8V

Socket

B8G

Heater

12.6 V

Sections

1

Pentode

High-transconductance lock-in pentode capable of extended-cutoff operation for high-frequency amplification and controlled receiver gain.

Base

8BJ

Socket

LOCKIN8

Heater

12.6 V

Sections

1

Pentode

Remote-cutoff high-transconductance pentode, co-designated 6AB7/1853, for gain-controlled high-frequency receiver and television amplification.

Base

8N

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Semi-remote-cutoff miniature pentode for RF and IF amplification in 100 mA series-heater AC/DC radio receivers.

Base

7CC

Socket

B7G

Heater

18 V

Sections

1

Pentode

Controlled-warm-up semi-remote-cutoff pentode for RF/IF stages in 100 mA series-heater receivers, electrically similar to 18FW6.

Base

Not recorded

Socket

B7G

Heater

18 V

Sections

1

Pentode

Semi-remote-cutoff pentode for gain-controlled RF/IF amplification, using an 18.9 V heater while retaining 6HR6 electrical characteristics.

Base

Not recorded

Socket

B9E

Heater

18.9 V

Sections

1

Pentode

Directly heated variable-mu battery pentode for gain-controlled RF amplification with economical 2 V, 60 mA filament operation.

Base

Not recorded

Socket

IO

Heater

2 V

Sections

1

Pentode

Directly heated remote-cutoff pentode for battery-receiver RF/IF amplification and automatic volume control, using a 2 V, 60 mA filament.

Base

4M

Socket

UX4

Heater

2 V

Sections

1

Pentode

Directly heated remote-cutoff RF pentode using a 2.0 V, 60 mA filament. Designed for Class A radio-frequency amplification, its variable-mu characteristic permits controlled gain in battery-operated receiver stages.

Base

4K

Socket

UX4

Heater

2 V

Sections

1

Pentode

Remote-cutoff RF pentode using a 1.2 V, 0.13 A filament. Designed for variable-gain radio-frequency amplification, its remote-cutoff characteristic makes it particularly suitable for controlled RF/IF stages in low-voltage equipment.

Base

8BR

Socket

Not recorded

Heater

1.2 V

Sections

1

Pentode

Battery variable-mu pentode designed for IF amplification and mixer service. Its controlled transconductance supports automatic-gain-control operation while the low-power filament construction suits portable receiver applications.

Base

Not recorded

Socket

B7G

Heater

1.4 V

Sections

1

Pentode

Super-control remote-cutoff radio-frequency amplifier pentode.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Pentode

Directly heated remote-cutoff RF pentode designed for Class A high-frequency amplification. Its variable-mu characteristic permits controlled gain in battery-operated receiver stages while maintaining low filament power requirements.

Base

5Y

Socket

UX5

Heater

2 V

Sections

1

Pentode

Directly heated variable-mu RF pentode designed for battery operation. Its gain-control characteristic makes it suitable for RF amplifier stages in portable receivers where automatic or manual gain variation is required.

Base

Not recorded

Socket

B7G

Heater

1.4 V

Sections

1

Pentode

Directly heated Russian pentode designed for high- and intermediate-frequency amplification in automatic-gain-control circuits. Its intended AGC service identifies a variable-gain signal role consistent with remote-cutoff pentode operation.

Base

Not recorded

Socket

Not recorded

Heater

1.2 V

Sections

1

Pentode

Directly heated semi-remote-cutoff RF pentode using a 1.4 V, 50 mA filament. Manufacturer handbook data identify it for variable-gain high-frequency amplification in low-power receiving equipment.

Base

7AO

Socket

B8G

Heater

1.4 V

Sections

1

Pentode

Super-control RF amplifier pentode. Its manufacturer designation identifies an extended-control characteristic intended for variable-gain radio-frequency amplification, making automatic gain control a central part of its receiver application.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Remote-cutoff RF pentode designed for variable-gain battery receiver service. Its directly heated construction combines low filament demand with controlled transconductance for automatic-gain-control RF stages.

Base

5Y

Socket

IO

Heater

1.4 V

Sections

1

Pentode

GT-envelope remote-cutoff RF pentode for variable-gain battery receiver service. It retains the controlled-transconductance RF amplifier function of the 1P5 family in a tubular glass envelope.

Base

5Y

Socket

IO

Heater

1.4 V

Sections

1

Pentode

Ruggedized filament-type semi-remote-cutoff pentode for RF and IF amplification in portable military equipment. It combines variable-gain receiver operation with strengthened construction for demanding field service.

Base

6AR

Socket

B7G

Heater

1.25 V

Sections

1

Pentode

Seven-pin miniature remote-cutoff pentode designed for aircraft receivers powered from storage batteries. Its 26.5 V, 70 mA heater and high transconductance support variable-gain RF/IF amplification in airborne radio equipment.

Base

7BK

Socket

B7G

Heater

26.5 V

Sections

1

Pentode

Remote-cutoff pentode using a 26.5 V, 70 mA heater. Manufacturer handbook data provide representative operating characteristics for controlled-gain signal amplification, with the extended heater voltage suited to series or specialized supply arrangements.

Base

7BK

Socket

B7G

Heater

26.5 V

Sections

1

Pentode

Western Electric variable-mu suppressor-grid pentode for high-frequency or audio-frequency voltage amplification and modulation. Its controlled characteristic permits gain variation while supporting a broader range of signal and modulation applications.

Base

Not recorded

Socket

MEDIUM6

Heater

2 V

Sections

1

Pentode

Western Electric heater-cathode general-purpose pentode, cross-referenced by the manufacturer to type 24A.

Base

Not recorded

Socket

UX4

Heater

10 V

Sections

1

Pentode

Variable-mu high-frequency amplifier pentode. Manufacturer documentation identifies it for controlled-gain RF amplification, using the extended-cutoff characteristic characteristic of early automatic-volume-control receiver stages.

Base

4M

Socket

IO

Heater

2 V

Sections

1

Pentode

Directly heated battery RF pentode designed for radio-frequency amplification in portable receiving equipment.

Base

Not recorded

Socket

IO

Heater

2 V

Sections

1

Pentode

Remote-cutoff RF pentode using a 6.3 V, 0.3 A heater. Designed for variable-gain high-frequency amplification, it is suited to automatic-volume-control stages in radio receivers.

Base

5F

Socket

UX5

Heater

6.3 V

Sections

1

Pentode

Variable-mu RF pentode published as type 39/44. Its extended-control characteristic supports automatic-volume-control RF amplification in receiving equipment, combining high-frequency gain with gradual cutoff under increasing grid bias.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Controlled-warm-up remote-cutoff RF/IF pentode equivalent to 6BA6. It combines variable-gain receiver amplification with heater characteristics designed for series-string equipment requiring coordinated warm-up behavior.

Base

7CC

Socket

B7G

Heater

3.15 V

Sections

1

Pentode

Variable-transconductance RF pentode for receiver and television amplifier service. Its gain-control characteristic supports regulated RF or IF amplification in circuits where signal level varies substantially.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Semi-remote-cutoff pentode designed for gain-controlled television video-IF amplifier stages. Its transfer characteristic permits effective AGC while maintaining the bandwidth required for television intermediate-frequency signals.

Base

7CM

Socket

B7G

Heater

3.15 V

Sections

1

Pentode

Semi-remote-cutoff pentode designed as an IF amplifier in color and black-and-white television receivers. Its controlled transconductance supports AGC operation in wideband television intermediate-frequency stages.

Base

9AQ

Socket

B9A

Heater

3.15 V

Sections

1