Voltage - Radio Detector Converter vacuum tubes

Heptode

Battery or receiving-tube frequency converter combining local-oscillator and mixer action for superheterodyne radio service. Its multi-grid structure provides frequency conversion while minimizing component count and, in battery types, filament power.

Base

7Z

Socket

IO

Heater

1.4 V

Sections

1

Heptode

The 1AQ5 is a miniature, directly heated pentagrid converter developed for battery-powered radio receivers. Its multiple grid electrodes provide oscillator injection and frequency mixing within one tube, enabling conversion of incoming radio-frequency signals to an intermediate frequency.

Base

Not recorded

Socket

Not recorded

Heater

1.4 V

Sections

1

Heptode

Battery or receiving-tube frequency converter combining local-oscillator and mixer action for superheterodyne radio service. Its multi-grid structure provides frequency conversion while minimizing component count and, in battery types, filament power.

Base

7Z

Socket

IO

Heater

1.4 V

Sections

1

Heptode

Battery or receiving-tube frequency converter combining local-oscillator and mixer action for superheterodyne radio service. Its multi-grid structure provides frequency conversion while minimizing component count and, in battery types, filament power.

Base

7Z

Socket

IO

Heater

1.4 V

Sections

1

Heptode

Battery or receiving-tube frequency converter combining local-oscillator and mixer action for superheterodyne radio service. Its multi-grid structure provides frequency conversion while minimizing component count and, in battery types, filament power.

Base

Not recorded

Socket

B7G

Heater

1.4 V

Sections

1

Heptode

Battery or receiving-tube frequency converter combining local-oscillator and mixer action for superheterodyne radio service. Its multi-grid structure provides frequency conversion while minimizing component count and, in battery types, filament power.

Base

6L

Socket

UX6

Heater

2 V

Sections

1

Heptode

Battery or receiving-tube frequency converter combining local-oscillator and mixer action for superheterodyne radio service. Its multi-grid structure provides frequency conversion while minimizing component count and, in battery types, filament power.

Base

G-7Z

Socket

IO

Heater

2 V

Sections

1

Heptode

Directly heated 2 V pentagrid frequency converter, using 1C7G-equivalent electrical specifications; octal base and miniature top cap.

Base

G-7Z

Socket

IO

Heater

2 V

Sections

1

Diode

Battery-operated RF detector diode intended for radio signal detection and low-level rectification. Its simple thermionic diode construction is optimized for receiving-equipment signal processing rather than power-supply rectification.

Base

Not recorded

Socket

Not recorded

Heater

1.4 V

Sections

1

Heptode

Battery or receiving-tube frequency converter combining local-oscillator and mixer action for superheterodyne radio service. Its multi-grid structure provides frequency conversion while minimizing component count and, in battery types, filament power.

Base

G-7Z

Socket

IO

Heater

2 V

Sections

1

Diode-Diode-Pentode

Directly heated double-diode pentode for detector, AVC, and voltage-amplifier functions in battery receivers. Paired diodes provide signal and control rectification while the high-resistance pentode supplies subsequent gain.

Base

6W

Socket

IO

Heater

2 V

Sections

3

Diode-Diode-Pentode

Battery double-diode pentode for detector, AVC, and voltage-amplifier service. Two diode sections recover the signal and develop control voltage while the high-resistance pentode supplies subsequent amplification.

Base

Not recorded

Socket

IO

Heater

2 V

Sections

3

Diode-Diode-Pentode

Directly heated double-diode pentode combining detector and control-voltage rectification with a high-resistance amplifier section. Its economical filament and low-current operation suit portable battery receiving equipment.

Base

7AD

Socket

IO

Heater

2 V

Sections

3

Diode-Diode-Pentode

Directly heated duplex-diode sharp-cutoff pentode for detector and Class A voltage-amplifier service in battery receivers. Two diodes provide signal and control rectification while the pentode supplies subsequent gain.

Base

7AD

Socket

Not recorded

Heater

2 V

Sections

3

Hexode-Triode

Russian directly heated triode-hexode frequency converter for low-power battery superheterodyne receivers. A 1.2 V, 60 mA oxide-coated filament powers separate triode oscillator and hexode mixer sections.

Base

Not recorded

Socket

Not recorded

Heater

1.2 V

Sections

2

Pentode

Directly heated Soviet multi-control pentode for RF amplification, oscillation, and frequency conversion. Two control grids permit mixer and oscillator functions in addition to ordinary amplification in compact battery equipment.

Base

Not recorded

Socket

Not recorded

Heater

1.2 V

Sections

1

Heptode

Battery pentagrid converter for portable superheterodyne receivers, combining local-oscillator and mixer functions in one multi-grid tube. Its economical filament minimizes battery drain while providing useful frequency conversion.

Base

7DC

Socket

B7G

Heater

1.4 V

Sections

1

Heptode

Battery heptode frequency changer for portable superheterodyne receivers. Its multi-grid structure combines local oscillation and mixing in one valve, reducing tube count while preserving low filament consumption.

Base

Not recorded

Socket

B8G

Heater

1.4 V

Sections

1

Diode-Pentode

Battery diode-pentode combining signal detection with relatively high-gain voltage amplification. The diode supplies detector action while the pentode provides subsequent gain from low-voltage portable receiver supplies.

Base

6AX

Socket

B8G

Heater

1.4 V

Sections

2

Diode-Pentode

Very-low-power battery diode-pentode combining signal detection with voltage amplification. The diode recovers the received signal while the pentode provides subsequent gain from an exceptionally economical directly heated filament.

Base

8CO

Socket

Not recorded

Heater

1.25 V

Sections

2

Heptode

Ruggedized low-power heptode converter for oscillator and mixer service in portable or specialized receiving equipment. Low filament demand and strengthened construction suit demanding battery-powered applications.

Base

7AT

Socket

B7G

Heater

1.25 V

Sections

1

Diode-Pentode

Very-low-power battery diode-pentode for detector and amplifier service. The diode provides signal detection while the pentode supplies subsequent voltage amplification from an exceptionally economical directly heated filament.

Base

8DA

Socket

Not recorded

Heater

1.25 V

Sections

2

Heptode

Extremely low-consumption battery pentagrid converter for portable superheterodyne receivers. Its very low filament current minimizes battery drain while the multi-grid structure combines oscillator and mixer functions.

Base

7DC

Socket

B7G

Heater

1.4 V

Sections

1

Hexode-Triode

Brimar 20A1 triode-hexode radio frequency converter with shared cathode and separate oscillator section.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

2

Hexode-Triode

Brimar 20D2 triode-hexode radio frequency converter with shared cathode and separate oscillator section.

Base

Not recorded

Socket

B9A

Heater

13 V

Sections

2

Heptode-Triode

Rogers 20J8 (GM) indirectly heated triode-heptode superheterodyne frequency converter with 20 V 0.15 A heater, common cathode and 8H octal base.

Base

8H

Socket

IO

Heater

20 V

Sections

2

Heptode

Cossor battery heptode frequency changer for superheterodyne receivers. Its multi-grid construction combines oscillator and mixer functions while operating from modest battery-receiver supplies.

Base

Not recorded

Socket

B4

Heater

2 V

Sections

1

Heptode

Heptode oscillator-converter for superheterodyne receivers using low-current series heater strings. Its multi-grid structure combines local oscillation and mixing with high plate resistance and useful conversion gain.

Base

7CHV

Socket

B7G

Heater

26 V

Sections

1

Heptode

Pentagrid oscillator-converter for early superheterodyne receivers. It combines local oscillation and mixing in one multi-grid tube, providing useful conversion gain in early AC-powered radio equipment.

Base

7CI

Socket

UX7

Heater

2.5 V

Sections

1

Diode-Diode-Pentode

Double-diode pentode combining detector, AVC, and voltage-amplifier functions in early AC receivers. Two diodes provide signal and control rectification while the pentode supplies subsequent amplification.

Base

7D

Socket

UX7

Heater

2.5 V

Sections

3

Pentode-Triode

VHF triode-pentode frequency changer for series-heater AC/DC television equipment.

Base

B9A

Socket

B9A

Heater

9 V

Sections

2

Pentode-Triode

VHF triode-pentode frequency changer designed for series-heater television receivers.

Base

Not recorded

Socket

B9A

Heater

9 V

Sections

2

Pentode-Triode

VHF triode-pentode frequency changer for AC/DC television receivers.

Base

B9A

Socket

B9A

Heater

9 V

Sections

2

Pentode-Triode

Variable-mu frame-grid triode-pentode for VHF television tuner frequency changing and controlled IF amplification.

Base

B9A

Socket

B9A

Heater

7.4 V

Sections

2

Heptode

Pentagrid oscillator-converter electrically related to the 6BE6, combining local-oscillator and mixer functions for superheterodyne receiving service with a controlled-warm-up series-string heater.

Base

7CH

Socket

B7G

Heater

3.15 V

Sections

1

Other

Gated-beam tube combining limiting, FM discrimination, and audio amplification, particularly for television intercarrier-sound and FM receiver service.

Base

7OF

Socket

B7G

Heater

3.15 V

Sections

1

Heptode

Multi-grid heptode for specialized receiving and signal-processing service. Separate control grids permit mixer and converter-type operation, allowing multiple signals or control voltages to influence plate current.

Base

7CH

Socket

B7G

Heater

3.15 V

Sections

1

Heptode

Multi-grid heptode for mixer, modulator, and specialized receiver signal-processing applications. Separate control grids provide independent influence over plate current for versatile frequency-conversion and modulation functions.

Base

7CH

Socket

B7G

Heater

3.15 V

Sections

1

Pentode

Dual-control sharp-cutoff pentode for specialized television circuits including FM detection, delay, gain control, and mixing. Independently effective control grids provide greater functional versatility than an ordinary amplifier pentode.

Base

Not recorded

Socket

B7G

Heater

3.15 V

Sections

1

Pentode

Dual-control sharp-cutoff pentode developed primarily as an FM detector in color and monochrome television receivers. Both control grids influence plate current independently, enabling specialized detector and control functions.

Base

7EN

Socket

B7G

Heater

3.15 V

Sections

1

Heptode

Western Electric heptode for multi-grid signal-processing and frequency-conversion service. Its electrode structure permits oscillator, mixer, or controlled-amplifier functions within one conventional receiving tube.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Heptode

Cossor heptode frequency changer for superheterodyne radio receivers. Its multi-grid construction combines local-oscillator and mixer functions, converting incoming RF signals to the receiver intermediate frequency in a single valve.

Base

Not recorded

Socket

B7

Heater

4 V

Sections

1

Heptode

Pentagrid oscillator-converter for superheterodyne receivers, combining local-oscillator and mixer functions for standard broadcast and FM service. Its controlled-warm-up heater is intended for series-string receiving equipment.

Base

7CH

Socket

B7G

Heater

4.2 V

Sections

1

Pentode-Triode

Medium-mu triode plus sharp-cutoff pentode used as a television frequency changer.

Base

9DC

Socket

B9A

Heater

4.6 V

Sections

2

Tetrode

Gated-beam FM and intercarrier-sound discriminator tube for limiter-discriminator service in television and FM receivers, combining detection and signal processing in one specialized beam structure.

Base

7DF

Socket

B7G

Heater

4.2 V

Sections

1

Heptode

Pentagrid gated-amplifier tube designed primarily as a combined sync separator and sync clipper in television receivers. Its multiple control grids permit specialized gating and signal-processing behavior rather than ordinary radio frequency-converter service.

Base

7CH

Socket

B7G

Heater

4.2 V

Sections

1

Pentode

Dual-control sharp-cutoff pentode for FM detection, delay, gain-control, and mixer service in television receivers. Its independently effective control grids enable specialized television sound-detector and signal-processing functions.

Base

Not recorded

Socket

B7G

Heater

4.2 V

Sections

1

Pentode

Dual-control sharp-cutoff miniature pentode used primarily as an FM detector in color and black-and-white television receivers. Its independently effective control grids provide the specialized detector and control characteristics required in television sound circuitry.

Base

7EN

Socket

B7G

Heater

4.2 V

Sections

1