Voltage - Radio Detector Converter vacuum tubes

Hexode

Low-current series-heater mixer hexode for superheterodyne frequency conversion. Its multi-grid construction performs mixing with a separate oscillator, providing intermediate-frequency conversion in economical series-heater receivers.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

1

Diode-Pentode

Telefunken screen-grid binode combining a detector diode with an amplifier pentode for detection followed by audio-frequency amplification. Integrating both functions reduces receiver tube count in series-heater equipment.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

2

Hexode

German military hexode for frequency conversion and related multi-grid signal-processing service. Its several control grids allow separate signals to interact within one tube, with heater characteristics suited to military equipment supplies.

Base

Not recorded

Socket

SP6

Heater

12.6 V

Sections

1

Hexode

Low-consumption German military hexode for frequency conversion and related signal-processing duties. Its directly heated filament minimizes power consumption in portable military radio equipment while the multi-grid structure provides mixer operation.

Base

Not recorded

Socket

Not recorded

Heater

2.4 V

Sections

1

Tetrode

Two-volt screen-grid valve for stable high-frequency amplification and sensitive detection, emphasizing low current consumption, low microphonics, and high electrode insulation in battery-operated receivers.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Tetrode

General-purpose screen-grid valve usable as detector or high- and low-frequency amplifier, providing flexible signal processing in early radio receiving equipment.

Base

Not recorded

Socket

B4

Heater

4 V

Sections

1

Tetrode

High-efficiency screen-grid valve designed for high-frequency amplification and detector service in early radio receivers, combining useful gain with demodulation capability.

Base

Not recorded

Socket

B4

Heater

6 V

Sections

1

Pentode

Mullard straight high-frequency pentode for RF amplification, detector service, and low-frequency voltage amplification. Its broad application range allows several receiver functions from one series-heater tube type.

Base

Not recorded

Socket

Not recorded

Heater

13 V

Sections

1

Pentode

Mullard straight high-frequency pentode for RF amplification, detector service, and low-frequency amplification. High transconductance and exceptionally high plate resistance provide substantial gain across several receiver signal-processing roles.

Base

Not recorded

Socket

Not recorded

Heater

13 V

Sections

1

Pentode

Directly heated screen-grid high-frequency pentode for battery receivers, usable as either an RF amplifier or detector. Its low-voltage filament provides useful receiver gain while preserving reasonable battery economy.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Directly heated screened high-frequency pentode for battery receivers, with documented use as both an RF amplifier and detector. Its economical filament and useful transconductance support portable receiver signal processing.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Indirectly heated high-frequency pentode for RF amplification or speech detection in AC mains receivers. Its ability to serve as either amplifier or detector provides useful flexibility in early transformer-powered radios.

Base

Not recorded

Socket

B7

Heater

4 V

Sections

1

Pentode

High-transconductance screened pentode developed primarily for television RF and IF stages, with additional video-output and frequency-changer applications. Its broad television roles make it more versatile than a conventional RF-only pentode.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Pentode

Straight high-frequency pentode for RF amplification, detector service, or low-frequency amplification in AC/DC receivers and car radios. Its broad application range allows several receiver functions from one series-heater tube.

Base

Not recorded

Socket

B7

Heater

13 V

Sections

1

Octode

Tungsram octode frequency changer for superheterodyne receivers. Its multi-grid structure combines local oscillation and mixing within one valve, reducing the receiver front end to a single conversion stage.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Octode

Battery-operated octode frequency changer for portable superheterodyne receivers. Its multi-grid structure combines oscillator and mixer functions while maintaining economical heater consumption.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode-Triode

Triode-pentode designed specifically as a frequency changer, combining oscillator and mixer functions for radio or television receiving equipment.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

2

Pentode-Triode

Triode-pentode designed specifically as a frequency changer, combining oscillator and mixer functions for radio or television receiving equipment.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

2

Pentode-Triode

Triode-pentode designed specifically as a frequency changer, combining oscillator and mixer functions for radio or television receiving equipment.

Base

Not recorded

Socket

IO

Heater

2 V

Sections

2

Pentode-Triode

Triode-pentode designed specifically as a frequency changer, combining oscillator and mixer functions for radio or television receiving equipment.

Base

Not recorded

Socket

IO

Heater

2 V

Sections

2

Pentode-Triode

Triode-pentode designed specifically as a frequency changer, combining oscillator and mixer functions for radio or television receiving equipment.

Base

Not recorded

Socket

Not recorded

Heater

26 V

Sections

2

Diode-Pentode

Series-heater diode variable-mu pentode for RF/IF amplification and signal detection. The pentode provides controlled gain for automatic gain control while the diode handles detector or control rectification.

Base

Not recorded

Socket

RIMLOCK8

Heater

12.6 V

Sections

2

Diode-Pentode

Series-heater diode variable-mu pentode combining receiver detection with controlled RF, IF, or audio amplification. The pentode provides broad gain control while the diode supplies independent detection.

Base

Not recorded

Socket

B8A

Heater

12.6 V

Sections

2

Diode-Diode-Pentode

Series-heater diode-pentode combining receiver detection with high-resistance small-signal amplification. The pentode supplies receiver gain while diode sections provide detector or control-voltage rectification.

Base

Not recorded

Socket

P8A

Heater

20 V

Sections

3

Diode-Diode-Pentode

Series-heater double-diode variable-mu pentode for RF/IF amplification, detection, and automatic gain control. The pentode provides controllable gain while paired diodes handle detector and control rectification.

Base

Not recorded

Socket

B9A

Heater

19 V

Sections

3

Diode-Diode-Pentode

Series-heater double-diode variable-mu pentode for high-gain RF/IF amplification, AM detection, and automatic volume control. Paired diodes provide detector and AVC rectification.

Base

Not recorded

Socket

B9A

Heater

19 V

Sections

3

Pentode-Triode

Series-heater triode-pentode frequency changer for television equipment at frequencies extending to approximately 220 MHz.

Base

B9A

Socket

B9A

Heater

27 V

Sections

2

Pentode

High-frequency pentode for 100 mA series-heater AC/DC receivers, particularly RF amplification and mixer service in FM equipment. High transconductance provides strong gain and useful frequency-conversion performance.

Base

Not recorded

Socket

B9A

Heater

19 V

Sections

1

Diode-Diode-Pentode

Double-diode variable-mu pentode combining IF amplification, detection, and automatic gain control, with a remote-cutoff pentode and two physical detector-diode sections.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

3

Heptode

Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.

Base

Not recorded

Socket

B7

Heater

2 V

Sections

1

Heptode

Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Heptode

Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.

Base

Not recorded

Socket

B7

Heater

13 V

Sections

1

Heptode

Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.

Base

Not recorded

Socket

B7

Heater

4 V

Sections

1

Heptode

Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.

Base

Not recorded

Socket

B7

Heater

13 V

Sections

1

Heptode

Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.

Base

Not recorded

Socket

B7

Heater

4 V

Sections

1

Heptode

Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Heptode

Marconi heptode mixer requiring a separate local oscillator. Its multi-grid structure performs radio-frequency mixing and intermediate-frequency conversion without incorporating the oscillator function internally.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

1

Pentode-Triode

Medium-mu triode plus sharp-cutoff pentode designed for television frequency-changer and oscillator-mixer service.

Base

9DC

Socket

B9A

Heater

6.3 V

Sections

2

Pentode-Triode

Medium-mu triode plus sharp-cutoff pentode designed for combined oscillator and mixer service in television receivers.

Base

9QA

Socket

B9A

Heater

4.1 V

Sections

2

Pentode

Two-volt high-frequency pentode explicitly specified for radio detector, LF-amplifier, oscillator, and HF-amplifier service. Its detector role is sufficiently central to retain the radio detector/converter umbrella.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Pentode

Miniature RF pentode for Class-A amplification and mixer service, with manufacturer operating data specifically covering suppressor-grid oscillator injection and frequency conversion in receiver front ends.

Base

B7G

Socket

B7G

Heater

6.3 V

Sections

1

Pentode

Marconi acorn high-frequency pentode providing useful RF gain above 50 MHz and explicitly suitable as a suppressor-grid frequency changer. Its compact construction supports early VHF receiver and measurement applications.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

1