5814

Special-quality medium-mu twin triode for industrial amplifier, oscillator, multivibrator, and control applications, combining useful current capability with dependable operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 12.6 V / 175 mA

Description

Reliable medium-mu double triode with separate cathodes, electrically similar to 12AU7 and intended for MIL-qualified service.

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: 12.6 V
Nominal heater current: 175 mA
Parallel heater voltage: 6.3 V
Parallel heater current: 350 mA
Series capable: Yes

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: 7700 Ω
Transconductance: 0.0022 S
Amplification factor: 17
Max plate voltage: 330 V
Max plate dissipation: 3 W
Max cathode current: 22 mA
Rectifier max heater-cathode voltage: 100 V

Representative row for two identical medium-mu triode sections; absolute maxima used.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7700 Ω
Transconductance: 0.0022 S
Amplification factor: 17
Max plate voltage: 330 V
Max plate dissipation: 3 W
Max cathode current: 22 mA

Second physical triode restored under current one-row-per-physical-section policy.

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

Triode

Characteristic

Transconductance
2200 µS
Amplification Factor
17

Other

Maximum Plate Voltage
330 V
Maximum Plate Dissipation
3 W
Maximum Cathode Current
22 mA
Heater Voltage Series
12.6 V
Heater Current Series
175 mA
Heater Voltage Parallel
6.3 V
Heater Current Parallel
350 mA
Plate Voltage
250 V
ClassA,EachSection
Grid Voltage
-8.5 V
ClassA,EachSection
Plate Current
10.5 mA
ClassA,EachSection

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Voltage
250 V
ClassA EachSection
Grid Voltage
-8.5 V
ClassA EachSection

Characteristic

Plate Current
10.5 mA
ClassA EachSection