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

Voltage - Triple Triode ·Triode-Triode-Triode

6BK11

Compactron containing one medium-high-mu triode and two high-mu triodes for multi-stage amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
-
Socket code
B12C
Base pins
12
Nominal heater
6.3 V / 600 mA

Description

Compactron containing one medium-high-mu triode and two high-mu triodes.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12C
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
600 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

3 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
45000 Ω
Transconductance
0.00155 S
Amplification factor
70

Published ratings/characteristics promoted from supplied source; additional conditions retained in parameter table.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
62500 Ω
Transconductance
0.0016 S
Amplification factor
100

Published ratings/characteristics promoted from supplied source; additional conditions retained in parameter table.

Section 3

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
62500 Ω
Transconductance
0.0016 S
Amplification factor
100

Published ratings/characteristics promoted from supplied source; additional conditions retained in parameter table.

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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Plate Resistance

    45000 ohm

  • Transconductance

    1550 uS

  • Amplification Factor

    70

Other

  • Plate Voltage

    250 V

    ClassA

  • Grid Voltage

    -2.5 V

    ClassA

  • Plate Current

    1.6 mA

    ClassA

SECTION 2

Triode

Other

  • Plate Voltage

    250 V

    ClassA

  • Grid Voltage

    -2 V

    ClassA

  • Plate Current

    1.2 mA

    ClassA

Characteristic

  • Plate Resistance

    62500 ohm

  • Transconductance

    1600 uS

  • Amplification Factor

    100

SECTION 3

Triode

Other

  • Plate Voltage

    250 V

    ClassA

  • Grid Voltage

    -2 V

    ClassA

  • Plate Current

    1.2 mA

    ClassA

Characteristic

  • Plate Resistance

    62500 ohm

  • Transconductance

    1600 uS

  • Amplification Factor

    100