Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage - Dual Triode (similar) ·Triode-Triode

6922

Premium-quality high-transconductance miniature twin triode, co-designated E88CC, intended for low-frequency voltage amplification where closely controlled characteristics and dependable performance are important.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 300 mA

Description

6922 is listed in the supplied Amperex material as a premium-quality twin triode. Published ratings and characteristics were captured from the supplied table.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
2600 Ω
Transconductance
0.0125 S
Amplification factor
33
Max plate voltage
300 V
Max plate dissipation
1.8 W
Max cathode current
20 mA

Representative section for two electrically identical sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
2600 Ω
Transconductance
0.0125 S
Amplification factor
33
Max plate voltage
300 V
Max plate dissipation
1.8 W
Max cathode current
20 mA

Second physical triode section; electrically identical twin section.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    300 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Plate Dissipation

    1.65 W

  • Maximum Cathode Current

    22 mA

Characteristic

  • Transconductance

    12500 µS

    Typical

  • Amplification Factor

    33

    Typical

Data set 02

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    220 V

    Published Amperex table

  • Maximum plate current

    20 mA

    Published Amperex table

  • Maximum cathode current

    100 mA

    Published Amperex table

  • Maximum grid current

    15 mA

    Published Amperex table

Characteristic

  • Plate resistance

    12500 ohm

    Published Amperex table

  • Transconductance

    33000 µS

    Published Amperex table

  • Heater/filament voltage

    6.3 V

    Published Amperex table

  • Heater/filament current

    300 mA

    Published Amperex table

Data set 03

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    365 mA

  • EquivalentDesignation

    E88CC

Data set 04

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Interelectrode capacitances

    Published

    See source sheet for electrode-specific capacitance values

Data set 05

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater voltage

    6.3 V

    Published rating

  • Heater current

    300 mA

    Published rating

  • Published characteristic value

    3.1

    PremiumQuality

  • Published characteristic value 2

    0.5

    PremiumQuality

Other

  • Maximum plate voltage

    220 V

    PremiumQuality

  • Maximum plate current

    20 mA

    PremiumQuality

Data set 06

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Peak heater-cathode voltage heater negative

    60 V

    EachSection

  • Peak heater-cathode voltage heater positive

    120 V

    EachSection

  • Plate voltage

    90 V

    ClassA;EachSection

  • Plate current

    15 mA

    ClassA;EachSection

Characteristic

  • Transconductance

    12500 uS

    EachSection

  • Amplification factor

    33

    EachSection

  • Plate resistance

    2600 ohm

    EachSection

Capacitance

  • Grid-to-plate capacitance

    1.4 pF

    EachSection

  • Grid-to-cathode capacitance

    3.1 pF

    EachSection

  • Plate-to-cathode capacitance

    1.75 pF

    EachSection

Data set 07

2026 Genalex Rebrand

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Transconductance

    9000 to 16000 µS

    Plate 90 V; cathode resistor 82 ohm

  • Amplification Factor

    24 to 40

    Plate 90 V; cathode resistor 82 ohm

  • Plate Current

    14 to 18 mA

    Plate 90 V; cathode resistor 82 ohm

Data set 08

2026 JJ Electronic

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Uf

    6.3 V

    Published value

  • If

    300 mA

    Published value

  • Ua

    220 V

    Published value

Characteristics

  • Ua

    90 V

    Published value

  • Ug

    -1.3 V

    Published value

  • Ia

    15 mA

    Published value

  • S

    12500 µS

    Published value

  • Ri

    2.6 kΩ

    Published value

  • µ

    33

    Published value

  • U-k/f+

    60 V

    Published value

Capacitance

  • cg/k

    3.1

    Published value

  • ca

    0.18

    Published value

  • cg/a

    1.4

    Published value