Alternatives & variations Download PDF datasheet

Voltage Dual Triode Pentode ·Pentode-Triode-Triode

6BH11

Television Duodecar combining two medium-mu general-purpose triodes with a sharp-cutoff pentode specifically intended for horizontal-deflection oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: 12FP
Socket code: B12C
Base pins: 12
Nominal heater: 6.3 V / 800 mA

Description

Duodecar combination tube with two medium-mu triodes for general-purpose service and a sharp-cutoff pentode intended for horizontal-deflection oscillator operation in television receivers.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12FP
Socket code: B12C
Base pins: 12
Nominal heater voltage: 6.3 V
Nominal heater current: 800 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12FP - 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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 200000 Ω
Transconductance: 0.0175 S
Max plate voltage: 350 V
Max screen voltage: 330 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.5 W
Max cathode current: 20 mA

Sharp-cutoff pentode; peak cathode current 300 mA and average cathode current 20 mA in horizontal-deflection oscillator service.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5400 Ω
Transconductance: 0.0085 S
Amplification factor: 46
Max plate voltage: 330 V
Max plate dissipation: 2.5 W

Representative row for the two electrically identical triode sections; small capacitance differences are preserved by physical-section condition.

Section 3

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5400 Ω
Transconductance: 0.0085 S
Amplification factor: 46
Max plate voltage: 330 V
Max plate dissipation: 2.5 W

Second physical triode section; added to align physical rows with SectionCount.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Screen Supply Voltage
330 V
PeakNegativeGrid1Voltage
175 V
Peak Cathode Current
300 mA

Characteristic

Plate Voltage
125 V
AverageCharacteristics
Screen Voltage
125 V
AverageCharacteristics
Grid1 Voltage
-1 V
AverageCharacteristics
Plate Current
12 mA
AverageCharacteristics
Screen Current
4 mA
AverageCharacteristics
Grid1VoltageAtPlateCurrent10uA
-8 V
AverageCharacteristics

Capacitance

Grid1 To Plate Capacitance
0.11 pF
Input Capacitance
5.5 pF
Output Capacitance
2.2 pF

SECTION 2

Triode

Characteristic

Plate Voltage
125 V
EachTriode
Grid Voltage
-1 V
EachTriode
Plate Current
13.5 mA
EachTriode
GridVoltageAtPlateCurrent10uA
-8 V
EachTriode

Capacitance

Grid To Plate Capacitance
1.7 pF
Section1
Input Capacitance
3.2 pF
Section1
Output Capacitance
1.4 pF
Section1
Grid To Plate Capacitance
1.8 pF
Section2
Input Capacitance
3 pF
Section2
Output Capacitance
0.6 pF
Section2

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
125 V
ClassA
Screen-grid voltage
125 V
ClassA
Grid voltage
-1 V
ClassA
Plate current
12 mA
ClassA
Screen-grid current
4 mA
ClassA
Average cathode current
20 mA
HorizontalDeflectionOscillator
Peak cathode current
300 mA
HorizontalDeflectionOscillator

SECTION 2

Triode

Other

Plate voltage
125 V
ClassA;EachTriode
Grid voltage
-1 V
ClassA;EachTriode
Plate current
13.5 mA
ClassA;EachTriode