Voltage - Radio Detector Converter vacuum tubes

Pentode-Triode

Triode plus sharp-cutoff frame-grid RF pentode for frequency-changing service to approximately 220 MHz.

Base

Not recorded

Socket

B9A

Heater

4.6 V

Sections

2

Pentode-Triode

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

Base

9QA

Socket

B9A

Heater

4.3 V

Sections

2

Pentode-Triode

Triode plus frame-grid pentode designed for television frequency-converter service.

Base

Not recorded

Socket

B9A

Heater

4.2 V

Sections

2

Pentode-Triode

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

Base

9DC

Socket

B9A

Heater

4.5 V

Sections

2

Pentode-Triode

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

Base

Not recorded

Socket

B9A

Heater

4.3 V

Sections

2

Pentode

Premium subminiature dual-control pentode for mixer, gated-amplifier, and specialized control applications in severe military and industrial environments. Independent control electrodes permit frequency conversion, gating, and gain-control functions beyond ordinary pentode amplification.

Base

8DC

Socket

SUBMINIATURE8

Heater

6.3 V

Sections

1

Pentode

Ruggedized dual-control variable-mu pentode for mixer, controlled-amplifier, and specialized RF circuits. Independent control grids permit frequency conversion, gating, and gain-control functions, while extensive heater-cycling capability reflects demanding military and industrial service.

Base

E7-1

Socket

B7G

Heater

6.3 V

Sections

1

Heptode

Industrial pentagrid converter for oscillator and mixer service in communications and specialized receiving equipment. Its multi-grid construction provides frequency conversion with high plate resistance and conventional 6.3 V heater operation.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Dual-control sharp-cutoff pentode for gated-amplifier and mixer service to approximately 400 MHz. Separate control grids provide switching and frequency-conversion functions, while its heater rating suits specialized aircraft and military electrical systems.

Base

8DC

Socket

B8D

Heater

26.5 V

Sections

1

Heptode

Industrial pentagrid converter for oscillator and mixer service in communications or specialized receiving equipment. Its multi-grid construction provides frequency conversion with high plate resistance and conventional operating voltages.

Base

8R

Socket

Not recorded

Heater

6.3 V

Sections

1

Pentode-Triode

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

Base

9DW

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

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

Base

9EC

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

Medium-mu triode plus sharp-cutoff pentode used as a combined oscillator and mixer in VHF television tuners.

Base

9FA

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

Medium-mu triode and sharp-cutoff pentode used as a combined oscillator and mixer in television and AM/FM receivers.

Base

9GF

Socket

B9A

Heater

4.7 V

Sections

2

Tetrode-Triode

Triode-tetrode designed for VHF oscillator and mixer service.

Base

9FX

Socket

B9A

Heater

4.7 V

Sections

2

Tetrode-Triode

Medium-mu triode and sharp-cutoff tetrode used as a combined VHF oscillator and mixer in television receivers.

Base

9FX

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

Medium-mu triode and sharp-cutoff pentode used as a combined television oscillator and mixer.

Base

9AE

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

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

Base

Not recorded

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

Triode-pentode designed for television oscillator and mixer service.

Base

Not recorded

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

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

Base

9GF

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

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

Base

9FA

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

9QA

Socket

B9A

Heater

5.6 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

9GF

Socket

B9A

Heater

5.4 V

Sections

2

Pentode

Dual-control sharp-cutoff pentode developed primarily for FM sound-detector service and specialized television circuits. Separate control grids independently influence plate current, enabling detector, gating, mixing, and control functions beyond conventional pentode amplification.

Base

Not recorded

Socket

B7G

Heater

4.7 V

Sections

1

Pentode-Triode

Medium-mu triode and frame-grid sharp-cutoff pentode frequency converter for VHF television tuners.

Base

Not recorded

Socket

B9A

Heater

5.6 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

Not recorded

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

Not recorded

Socket

B9A

Heater

5.3 V

Sections

2

Pentode

High-transconductance dual-control pentode designed as an FM sound detector in color and black-and-white television receivers. Its two independent control grids provide specialized detector and amplifier action with considerably greater signal capability than earlier detector pentodes.

Base

Not recorded

Socket

B7G

Heater

4.75 V

Sections

1

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

Not recorded

Socket

B9A

Heater

5.6 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

9DC

Socket

B9A

Heater

5.6 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

Not recorded

Socket

B9A

Heater

5.6 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

9AE

Socket

B9A

Heater

5 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

9AK

Socket

B9A

Heater

4.7 V

Sections

2

Pentode-Triode

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

2

Pentode

Specialized receiving tube retained in the RadioDetectorConverter population; available source metadata was insufficient in this pass to support a narrower functional reassignment without speculation.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Heptode

Russian heptode frequency-converter receiving tube.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Heptode

Chinese heptode frequency changer for superheterodyne radio receivers. Its multi-grid structure combines oscillator and mixer functions, translating incoming RF signals to the receiver intermediate frequency from conventional receiving-equipment supplies.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Heptode

Russian heptode for oscillator-converter service in radio receiving equipment. Its multi-grid construction combines local oscillation and mixing, translating incoming RF signals to the intermediate frequency from a conventional 6.3 V heater supply.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Heptode

Classic pentagrid oscillator-converter for superheterodyne radio receivers. It combines local oscillation and mixing in one multi-grid tube, providing conventional frequency-changing performance for early AC receiving equipment.

Base

7C

Socket

UX7

Heater

6.3 V

Sections

1

Heptode

Brimar heptode frequency changer for superheterodyne radio receivers. Its multi-grid structure combines local-oscillator and mixer functions, reducing the receiver front end to a single valve for frequency conversion.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Heptode

Chinese heptode frequency changer for superheterodyne receiving service. Its multi-grid construction combines local oscillation and mixing, converting incoming radio signals to intermediate frequency from conventional receiver supplies.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Heptode

Pentagrid converter for Majestic receivers.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Heptode

Metal-envelope pentagrid oscillator-converter for superheterodyne radio receivers. It combines local oscillation and mixing within one multi-grid tube, providing established frequency-changing performance for mains-powered receiving equipment.

Base

8A

Socket

IO

Heater

6.3 V

Sections

1

Heptode

Glass-envelope pentagrid oscillator-converter for superheterodyne radio receivers. It combines local oscillation and mixing within one multi-grid tube, providing established frequency-changing performance from conventional receiver supplies.

Base

8A

Socket

IO

Heater

6.3 V

Sections

1

Heptode

GT-envelope pentagrid converter for superheterodyne radio receivers, combining oscillator and mixer functions in one tube. Its compact GT envelope provides the established 6A8 frequency-changing characteristics in a smaller physical format.

Base

8A

Socket

IO

Heater

6.3 V

Sections

1

Heptode

Ceramic-base pentagrid converter for combined oscillator and mixer service at higher frequencies. GTX construction is specifically intended for high-frequency circuitry, distinguishing it from ordinary 6A8 receiving versions.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Tetrode

Twin tetrode designed for VHF RF amplification and autodyne mixer service in receiver front ends.

Base

Not recorded

Socket

B10B

Heater

6.3 V

Sections

1

Diode-Diode-Pentode

Duplex-diode and RF-pentode combination designed for receiver detection and Class-A radio-frequency amplification.

Base

9T

Socket

B9A

Heater

6.3 V

Sections

3