Voltage - Radio Detector Converter vacuum tubes

Pentode-Triode

Medium-mu triode and sharp-cutoff pentode frequency changer for VHF television tuners.

Base

9GF

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Medium-mu triode and sharp-cutoff pentode for VHF television-tuner oscillator and mixer service.

Base

9QA

Socket

B9A

Heater

6.3 V

Sections

2

Hexode

Miniature hexode frequency changer designed for use with a separate triode oscillator, also suitable as a gated amplifier through approximately 20 MHz.

Base

B7G

Socket

B7G

Heater

6.3 V

Sections

1

Heptode

Variable-mu heptode frequency changer for superheterodyne radio receivers, providing mixer and conversion service with approximately 475 µS conversion transconductance.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Diode-Diode-Pentode

Common-cathode double-diode pentode designed for audio-frequency amplification, signal detection, and automatic-gain-control rectification.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

3

Pentode-Triode

Miniature triode-pentode used as a combined oscillator and mixer in color and black-and-white television receivers.

Base

9QA

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Medium-mu triode plus frame-grid sharp-cutoff pentode used as a combined oscillator/mixer and television IF/video amplifier.

Base

9MP

Socket

B9A

Heater

6.3 V

Sections

2

Pentode

Miniature pentode designed as an intermediate-frequency amplifier and limiter in FM receivers.

Base

7BK

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Dual-control miniature pentode designed for FM sound-detector service in color and monochrome television receivers. Two independent control grids provide separate influence over plate current for specialized detection.

Base

7EN

Socket

B7G

Heater

6.3 V

Sections

1

Heptode-Triode

Russian 6I1P (6И1П) indirectly heated triode-heptode frequency converter with shared cathode and 6.3 V 300 mA heater.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

2

Heptode-Triode

Soviet 6I1P-EV rugged long-life triode-heptode frequency converter with shared cathode and 6.3 V 300 mA heater.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

2

Heptode-Triode

Soviet 6I1P-V rugged triode-heptode frequency converter with shared cathode, 6.3 V 300 mA heater and 2000-hour minimum service life.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

2

Heptode-Triode

Soviet 6I4P triode-heptode for television noise gates and sync-pulse amplification, with separate cathodes and 6.3 V 450 mA heater.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Pentode

Russian dual-control high-frequency pentode for RF amplification and frequency conversion. The additional control electrode enables mixer and converter functions beyond ordinary pentode voltage amplification.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Ruggedized long-life Russian dual-control high-frequency pentode for RF amplification and frequency conversion. Dual-control construction permits mixer and converter operation in demanding professional equipment.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Russian wideband high-frequency pentode for RF voltage amplification and frequency conversion. High transconductance and long rated service life suit professional broadband amplifier and converter applications.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Extended-reliability Russian wideband pentode for RF voltage amplification and frequency conversion. High transconductance, long guaranteed service life, and ruggedized construction suit professional high-frequency equipment.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode

Russian dual-control subminiature pentode for RF amplification, frequency conversion, and pulse-forming circuits. Its additional control electrode enables mixing, gating, and pulse functions beyond ordinary amplification.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

High-reliability Russian dual-control subminiature pentode for RF amplification, frequency conversion, and pulse-forming service. Compact low-capacitance construction supports mixer, gating, and pulse functions in demanding equipment.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode

Classic sharp-cutoff three-grid pentode for RF voltage amplification and detector service in radio receivers. High plate resistance provides strong voltage gain, while the accessible suppressor grid permits specialized detector and control circuits.

Base

7R

Socket

UX7

Heater

6.3 V

Sections

1

Pentode

Glass-envelope sharp-cutoff pentode for detector, RF, and general voltage-amplifier service. High plate resistance provides substantial voltage gain, while manufacturer data also support triode-connected operation.

Base

7R

Socket

UX7

Heater

6.3 V

Sections

1

Pentode

GT-envelope sharp-cutoff pentode for detector and high-gain voltage-amplifier service. High plate resistance and modest transconductance provide substantial receiver gain, with manufacturer data also supporting triode connection.

Base

7R

Socket

IO

Heater

6.3 V

Sections

1

Pentode-Triode

Medium-mu triode and sharp-cutoff pentode for combined television oscillator and mixer service around a 40-MHz intermediate frequency.

Base

9AE

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Medium-mu triode plus frame-grid sharp-cutoff pentode used as a combined oscillator-mixer tube in television receivers.

Base

9DC

Socket

B9A

Heater

6.3 V

Sections

2

Other

Gated-beam tube combining limiter, discriminator, and audio-voltage amplification for television intercarrier-sound and FM receiver circuits.

Base

7DF

Socket

B7G

Heater

6.3 V

Sections

1

Pentode-Triode

Medium-mu triode and sharp-cutoff pentode used together as oscillator and mixer in VHF television receivers.

Base

9FZ

Socket

B9A

Heater

6.3 V

Sections

2

Heptode

Classic pentagrid mixer and amplifier for radio frequency conversion, modulation, and first-detector service using a separate oscillator.

Base

7T

Socket

IO

Heater

6.3 V

Sections

1

Heptode

Glass-envelope pentagrid heptode for radio mixer, first-detector, modulation, and controlled-amplifier service with a separate oscillator.

Base

7T

Socket

IO

Heater

6.3 V

Sections

1

Pentode-Triode

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Base

9GF

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Base

9DC

Socket

B9A

Heater

6 V

Sections

2

Diode-Pentode-Triode

Diode-triode-pentode receiving tube combining RF/IF amplification, detector rectification, and audio-frequency amplification.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

3

Diode-Diode-Pentode

Double-diode pentode combining detector and control-voltage rectification with high-resistance amplification. Paired diodes support detector, discriminator, or automatic-gain-control functions while the pentode supplies substantial gain.

Base

9T

Socket

B9A

Heater

6.3 V

Sections

3

Heptode

Widely used pentagrid oscillator-converter for superheterodyne receivers. Its multi-grid structure combines local oscillation and mixing in one tube, making it a common receiver frequency changer.

Base

RETMA 8R

Socket

IO

Heater

6.3 V

Sections

1

Heptode

The 6SA7GT is an octal pentagrid converter designed for amplitude-modulated superheterodyne receivers. Its multi-grid electrode system combines local-oscillator and frequency-mixer functions within one vacuum tube, producing an intermediate-frequency output from an incoming radio-frequency signal.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Heptode

GT/G pentagrid converter for combined oscillator and mixer service in superheterodyne receivers. Its multi-grid construction performs both frequency-changing functions within one conventional receiving tube.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Heptode

Ruggedized special-purpose pentagrid converter for oscillator and mixer service. High output resistance and strengthened WGT construction suit more demanding equipment than ordinary consumer receiving converters.

Base

9V

Socket

IO

Heater

6.3 V

Sections

1

Heptode

Pentagrid converter for oscillator and mixer service in superheterodyne receiving equipment. Its multi-grid structure performs frequency conversion with useful isolation between oscillator, signal-input, and output circuits.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Sharp-cutoff single-ended pentode for high-gain RF or audio voltage amplification. Manufacturer documentation also identifies detector, oscillator, and mixer service, making it unusually versatile among fixed-gain pentodes.

Base

8N

Socket

IO

Heater

6.3 V

Sections

1

Diode-Pentode

Diode-pentode combination for detector and voltage-amplifier service. The pentode provides useful gain and high output resistance while the diode supplies complementary detector or control-voltage rectification.

Base

7AZ

Socket

IO

Heater

6.3 V

Sections

2

Diode-Pentode

GT-envelope diode-pentode for combined signal detection and voltage amplification. The pentode supplies receiver gain while the diode provides a complementary detector or rectifying function.

Base

Not recorded

Socket

IO

Heater

Not recorded

Sections

2

Diode-Pentode

Diode plus sharp-cutoff RF pentode designed for AM detection, voltage amplification, and FM limiting below about 30 MHz. Its radio detector role is integral despite the sharp-cutoff amplifier section.

Base

7AZ

Socket

Not recorded

Heater

6.3 V

Sections

2

Hexode-Triode

The 6TE8GT is a combined triode-hexode receiving tube intended primarily for frequency conversion with a separate oscillator section. The triode supplies local oscillation while the hexode performs mixing, providing a compact solution for superheterodyne radio receiver circuits.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Pentode-Triode

Combined triode-pentode intended for VHF oscillator and frequency-converter service.

Base

9AE

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Base

EIA 9AE

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Base

9AK

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Base

9AK

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Base

Not recorded

Socket

B9A

Heater

13.5 V

Sections

2

Heptode

Receiver oscillator-converter combining local oscillation and signal mixing for superheterodyne frequency conversion. Its multi-grid structure integrates the front-end frequency-changing functions in one envelope.

Base

8AL

Socket

B8G

Heater

6.3 V

Sections

1