Alternatives & variations Download PDF datasheet

Power - Beam (NOT sweep) ·BeamPower-Triode-Triode

31AL10

Beam-power receiving tube intended for audio or general output service, providing substantial current and power from a series-heater television or radio supply.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: -
Socket code: B12C
Base pins: 12
Nominal heater: 31.5 V / 315 mA

Description

Compactron with medium-mu triode, high-mu triode, and high-perveance beam pentode for vertical output, oscillator, and sync-clipper service.

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: 31.5 V
Nominal heater current: 315 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

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 11700 Ω
Transconductance: 0.0071 S
Max plate voltage: 250 V
Max screen voltage: 200 V
Max plate dissipation: 7 W
Max screen dissipation: 1.8 W
Max cathode current: 70 mA

Promoted values are taken from clearly identified printed ratings/characteristics.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 11000 Ω
Transconductance: 0.0039 S
Amplification factor: 43
Max plate voltage: 330 V
Max plate dissipation: 1.2 W

Promoted values are taken from clearly identified printed ratings/characteristics.

Section 3

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 8500 Ω
Transconductance: 0.00235 S
Amplification factor: 20
Max plate voltage: 250 V
Max plate dissipation: 1 W
Max cathode current: 20 mA

Promoted values are taken from clearly identified printed ratings/characteristics.

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

Beam Power

Other

HeaterOrFilamentVoltageNominal
31.5 V
HeaterOrFilamentCurrentNominal
315 mA
MaxPlateVoltage
250 V
MaxScreenVoltage
200 V
MaxPlateDissipation
7 W
MaxScreenDissipation
1.8 W
MaxCathodeCurrent
70 mA
PeakPulsePlateVoltage
2000 V
VerticalDeflection
TotalPeakPlateScreenCurrent
245 mA
VerticalDeflection
Typical Plate Voltage
120 V
Typical Screen Voltage
110 V

Characteristic

Plate Resistance
11700 Ohm
Transconductance
7100 uS

Capacitance

Grid1 To Plate Capacitance
0.24 pF
Input Capacitance
12 pF
Output Capacitance
8 pF

SECTION 2

Triode

Other

HeaterOrFilamentVoltageNominal
31.5 V
HeaterOrFilamentCurrentNominal
315 mA
MaxPlateVoltage
330 V
MaxPlateDissipation
1.2 W
Typical Plate Voltage
150 V

Characteristic

Plate Resistance
11000 Ohm
Transconductance
3900 uS
Amplification Factor
43

Capacitance

Grid To Plate Capacitance
3 pF
Section1
Input Capacitance
3.2 pF
Section1
Output Capacitance
0.4 pF
Section1

SECTION 3

Triode

Other

HeaterOrFilamentVoltageNominal
31.5 V
HeaterOrFilamentCurrentNominal
315 mA
MaxPlateVoltage
250 V
MaxPlateDissipation
1 W
MaxCathodeCurrent
20 mA
Typical Plate Voltage
150 V

Characteristic

Plate Resistance
8500 Ohm
Transconductance
2350 uS
Amplification Factor
20

Capacitance

Grid To Plate Capacitance
3.7 pF
Section2
Input Capacitance
2 pF
Section2
Output Capacitance
0.6 pF
Section2