9BJ11

Duodecar two-section television video-IF tube combining a high-transconductance sharp-cutoff pentode input stage with a separate beam-power output section.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B12A
Base pins: 12
Nominal heater: -

Description

Duodecar two-section television video-IF tube combining a sharp-cutoff pentode input section and a beam-power output section.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B12A
Base pins: 12
Nominal heater voltage: -
Nominal heater current: -
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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 40000 Ω
Transconductance: 0.0075 S
Max plate voltage: 160 V
Max screen voltage: 160 V
Max plate dissipation: 2.8 W
Max screen dissipation: 1.25 W

Published ratings and characteristics promoted semantically from the approved source.

Section 2

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 40000 Ω
Transconductance: 0.0096 S
Max plate voltage: 160 V
Max screen voltage: 160 V
Max plate dissipation: 2.2 W
Max screen dissipation: 0.66 W

Published ratings and characteristics promoted semantically from the approved source.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Plate Resistance
40000 ohm
Transconductance
7500 µS

Other

Maximum Plate Voltage
160 V
Maximum Screen Voltage
160 V
Maximum Plate Dissipation
2.8 W
Maximum Screen Dissipation
1.25 W
Plate Supply Voltage
110 V
PentodeSection
Screen Voltage
110 V
PentodeSection
Plate Current
6.8 mA
PentodeSection

SECTION 2

Beam Power

Characteristic

Plate Resistance
40000 ohm
Transconductance
9600 µS

Other

Maximum Plate Voltage
160 V
Maximum Screen Voltage
160 V
Maximum Plate Dissipation
2.2 W
Maximum Screen Dissipation
0.66 W
Plate Supply Voltage
126 V
BeamPowerSection
Screen Voltage
125 V
BeamPowerSection
Plate Current
8.5 mA
BeamPowerSection