Voltage - Triode (with diode, heptode or hexode) vacuum tubes

Heptode-Triode

Triode-heptode frequency changer for radio receivers, integrating a local oscillator and mixer in one envelope. Its 19 V, 100 mA heater particularly suits series-heater mains receiver designs.

Base

Not recorded

Socket

B9A

Heater

19 V

Sections

2

Diode-Diode-Triode

Double-diode high-mu triode combining detector and voltage-amplifier functions in radio receivers. Two diodes provide signal or control-voltage rectification while the triode supplies substantial subsequent voltage gain.

Base

Not recorded

Socket

B9A

Heater

13 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode combining radio detection and voltage amplification. The paired diodes handle detector or control-voltage functions while the triode amplifies the recovered signal in series-heater receivers.

Base

Not recorded

Socket

Not recorded

Heater

14 V

Sections

3

Diode-Diode-Triode

Double-diode triode for combined detector and audio-frequency voltage-amplifier service in radio receivers. Two diodes perform detection and related rectification while the triode provides subsequent signal amplification.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode for radio detector and voltage-amplifier service. The diode sections provide detection and control-voltage rectification while the high-mu triode supplies substantial subsequent gain.

Base

Not recorded

Socket

Not recorded

Heater

13 V

Sections

3

Diode-Diode-Triode

Double-diode triode combining radio detection with subsequent voltage amplification. Two diode sections serve detector and control functions while the medium-mu triode amplifies the recovered audio signal.

Base

Not recorded

Socket

Not recorded

Heater

13 V

Sections

3

Heptode-Triode

Combination triode-heptode integrating oscillator and frequency-converter functions in a superheterodyne receiver. The triode provides local oscillation while the heptode supplies mixer action and conversion gain.

Base

E9-1

Socket

B9A

Heater

12.6 V

Sections

2

Diode-Diode-Triode

Double-diode high-mu triode widely used for radio detection, AVC generation, and audio voltage amplification. Paired diodes handle detection and control-voltage rectification while the triode supplies subsequent gain.

Base

7BT

Socket

B7G

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Controlled-warm-up 150 mA series-string diode-triode variant in the 12AT6A receiving family, intended for detector and voltage-amplifier service.

Base

Not recorded

Socket

B7G

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode combining detector and audio voltage-amplifier functions. The diode sections recover and rectify receiver signals while the high-gain triode provides substantial audio-frequency voltage amplification.

Base

7BT

Socket

B7G

Heater

12.6 V

Sections

3

Diode-Triode

Rogers 12B6 (GM) indirectly heated diode/high-mu triode with shared cathode, 12.6 V 0.15 A heater, metal-sprayed shield and top-cap triode control grid.

Base

Not recorded

Socket

IO

Heater

12.6 V

Sections

2

Diode-Diode-Triode

Double-diode triode combining detector functions with a relatively robust voltage-amplifier section. The diodes provide signal and control-voltage rectification while the triode supplies stronger current capability than many detector-amplifier combinations.

Base

Not recorded

Socket

B7G

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode for radio detection, AVC generation, and subsequent voltage amplification. Two diode sections handle signal and control-voltage rectification while the triode provides useful audio-frequency gain.

Base

7BT-0-2

Socket

Not recorded

Heater

12.6 V

Sections

3

Diode-Diode-Triode

High-mu triode with two diode sections designed particularly for television receivers. The diodes provide detector or signal-rectifying functions while the triode offers unusually strong current capability for subsequent amplification.

Base

9CF

Socket

B9A

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode for detector, control-voltage, and voltage-amplifier functions. The paired diodes provide signal rectification while the triode supplies substantial voltage gain in series-string receiving equipment.

Base

7BT-0-2

Socket

B7G

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Miniature double-diode triode for detector and amplifier service. Two diodes provide signal detection or related rectification while the lower-mu triode supplies comparatively strong current capability.

Base

Not recorded

Socket

B7G

Heater

12.6 V

Sections

3

Heptode-Triode

Triode-heptode front-end tube for 12 V automobile radios. The triode serves as RF amplifier while the heptode combines local-oscillator and mixer functions directly from the vehicle supply.

Base

9KV

Socket

B9A

Heater

12.6 V

Sections

2

Heptode-Triode

Low-voltage triode-heptode for automobile-radio RF amplification and frequency conversion. The triode provides front-end RF gain while the heptode integrates oscillator and mixer functions from the 12.6 V supply.

Base

9KV

Socket

B9A

Heater

12.6 V

Sections

2

Diode-Diode-Triode

Russian 12G2 (12Г2) metal-envelope double-diode triode for low-frequency detection and voltage preamplification, with 12.6 V 0.15 A heater and triode amplification factor approximately 100.

Base

Not recorded

Socket

IO

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Shuguang 12G2P indirectly heated double-diode triode for signal detection, low-frequency amplification and automatic volume control, with 12.6 V 0.15 A heater.

Base

Not recorded

Socket

Not recorded

Heater

12.6 V

Sections

3

Hexode-Triode

Triode-hexode frequency changer for superheterodyne receivers. The triode supplies local oscillation while the hexode performs mixer action, combining both frequency-conversion stages within one envelope.

Base

8KV

Socket

IO

Heater

12.6 V

Sections

2

Hexode-Triode

GT-envelope triode-hexode converter for superheterodyne receivers. The triode generates the local oscillator signal while the hexode performs frequency conversion to the receiver intermediate frequency.

Base

8KV

Socket

IO

Heater

12.6 V

Sections

2

Diode-Diode-Triode

Double-diode high-mu triode combining radio detection, control-voltage rectification, and subsequent voltage amplification. Two diodes provide detector functions while the triode supplies useful receiver gain.

Base

Not recorded

Socket

Not recorded

Heater

12.6 V

Sections

3

Diode-Diode-Triode

GT-envelope double-diode high-mu triode for detector, AVC, and audio voltage-amplifier service. Two diode sections handle signal and control rectification while the triode provides substantial subsequent gain.

Base

7V

Socket

IO

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Dual-diode high-mu triode providing detector diode sections and a Class-A voltage-amplifier triode for conventional receiving applications.

Base

8CB

Socket

IO

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode widely used for radio detection, AVC, and first audio voltage amplification. The two diodes provide signal and control-voltage rectification while the triode supplies substantial voltage gain after detection.

Base

8O

Socket

IO

Heater

12.6 V

Sections

3

Diode-Diode-Triode

GT-envelope double-diode high-mu triode for detector, AVC, and audio voltage-amplifier service. Its paired diodes perform signal and control-voltage rectification while the triode provides substantial gain for the recovered audio signal.

Base

8O

Socket

IO

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Double-diode low-mu triode combining detector and audio-amplifier functions in receiving equipment. The paired diodes provide signal and control-voltage rectification while the relatively low-resistance triode offers useful current-driving capability after detection.

Base

Not recorded

Socket

IO

Heater

12.6 V

Sections

3

Diode-Diode-Triode

GT-envelope double-diode triode for detector and audio-frequency amplifier service. Its paired diodes provide detection and control-voltage rectification while the medium-mu triode offers useful current-driving capability for subsequent receiver stages.

Base

Not recorded

Socket

IO

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Dissimilar-characteristic twin triode designed for Class-A amplifier service; despite its current database grouping, the available source describes a dual-triode rather than diode-triode construction.

Base

Not recorded

Socket

IO

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Double-diode very-high-mu triode for radio detection and voltage amplification. The paired diodes perform signal and control-voltage rectification while the high-gain triode provides substantial amplification of the recovered signal.

Base

Not recorded

Socket

B7

Heater

13 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode for detector, AVC, and audio voltage-amplifier service. Its two diode sections provide signal and control-voltage rectification while the triode supplies substantial voltage gain following detection.

Base

8W

Socket

B8G

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Double-diode low-mu triode combining detector and audio-amplifier functions. The paired diodes handle signal and control-voltage rectification while the relatively low-resistance triode provides useful current-driving capability after detection.

Base

8W

Socket

B8G

Heater

12.6 V

Sections

3

Diode-Diode-Triode

Rogers 14G6 indirectly heated double-diode high-mu triode for detector and voltage amplifier service, with shared cathode, 14 V 0.1 A heater and 9Z miniature base.

Base

9Z

Socket

B9A

Heater

14 V

Sections

3

Diode-Diode-Triode

Duplex-diode high-mu triode designed especially for FM detection and audio-frequency voltage amplification. The paired diodes perform detector functions while the separate-cathode triode amplifies the recovered audio signal.

Base

9KR

Socket

B9A

Heater

14 V

Sections

3

Diode-Diode-Triode

Sylvania 14GT8A miniature double-diode high-mu triode for FM detector and audio-frequency amplifier service, with 9KR nine-pin basing.

Base

9KR

Socket

Not recorded

Heater

Not recorded

Sections

3

Heptode-Triode

Triode-heptode frequency changer for superheterodyne receivers. A separate triode supplies local oscillation while the high-resistance heptode performs mixing, providing useful isolation between oscillator, RF input, and converted-signal circuits.

Base

8BL

Socket

B8G

Heater

12.6 V

Sections

2

Diode-Diode-Triode

Duplex-diode high-mu triode designed primarily for FM detector and audio-frequency voltage-amplifier service. The paired diode sections perform detection while the separate-cathode triode provides comparatively strong gain for the recovered audio signal.

Base

9KR

Socket

B9A

Heater

14 V

Sections

3

Hexode-Triode

Triode-hexode frequency converter for superheterodyne receivers. The triode serves as local oscillator while the remote-cutoff hexode performs mixing, combining oscillator and converter functions with high output resistance for good circuit isolation.

Base

LOCTAL

Socket

B8G

Heater

14 V

Sections

2

Diode-Diode-Triode

Double-diode high-mu triode for radio detector and audio-frequency voltage-amplifier service. The paired diodes provide detection and control-voltage rectification while the triode amplifies the recovered signal with substantial voltage gain.

Base

LOCTAL

Socket

B8G

Heater

14 V

Sections

3

Heptode-Triode

Triode-heptode frequency changer for superheterodyne radio receivers. A separate triode provides local oscillation while the heptode performs frequency conversion, combining the receiver front-end oscillator and mixer functions within one envelope.

Base

8BL

Socket

B8G

Heater

12.6 V

Sections

2

Diode-Diode-Triode

Double-diode very-high-mu triode for detector, AVC, and voltage-amplifier service. The paired diodes provide signal and control-voltage rectification while the high-gain triode supplies substantial amplification following the detector stage.

Base

8BZ

Socket

B8G

Heater

14 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode for detector, AVC, and voltage-amplifier service in series-heater receivers. The paired diodes provide signal and control-voltage rectification while the triode supplies substantial gain for the recovered audio signal.

Base

Not recorded

Socket

B7G

Heater

18 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode combining radio detection, control-voltage rectification, and audio voltage amplification in compact receiving equipment. The paired diodes handle signal and AVC functions while the triode supplies subsequent gain.

Base

Not recorded

Socket

B7G

Heater

18 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode combining radio detection, control-voltage rectification, and audio voltage amplification in compact receiving equipment. The paired diodes handle signal and AVC functions while the triode supplies subsequent gain.

Base

Not recorded

Socket

B9A

Heater

18 V

Sections

3

Diode-Diode-Triode

Double-diode high-mu triode combining radio detection, control-voltage rectification, and audio voltage amplification in compact receiving equipment. The paired diodes handle signal and AVC functions while the triode supplies subsequent gain.

Base

Not recorded

Socket

B9A

Heater

18 V

Sections

3

Diode-Rectifier-Rectifier-Triode

Triple-diode high-mu triode combining AM/FM detection with voltage amplification, integrating several receiver detector and first-audio functions within one envelope.

Base

9E

Socket

B9A

Heater

18.9 V

Sections

4

Heptode-Triode

Triode-heptode frequency changer for radio receivers, combining a dedicated oscillator triode with a heptode mixer. Manufacturer literature also permits the heptode to serve independently as an RF or IF amplifier.

Base

Not recorded

Socket

B9A

Heater

19 V

Sections

2