5814WB

Special-quality rugged medium-mu twin triode resistant to shock and vibration and suitable for prolonged cutoff, intended for military, industrial, amplifier, and oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9A
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 350 mA

Description

Special-quality 9-pin medium-mu twin triode with individual cathodes, resistant to shock and vibration and suitable for long periods under cutoff; for military, industrial and general-purpose amplifier/oscillator 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: 9A
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 350 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9A - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12P	B	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN22G1	B	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN32K	B	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN4H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN5H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN61P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN71G1	A	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN81K	A	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN9HCT	—	HCT — Heater Center Tap EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 6250 Ω
Transconductance: 0.0031 S
Amplification factor: 19.5
Max plate voltage: 330 V
Max plate dissipation: 3 W
Max cathode current: 22 mA

Representative row for repeated electrically identical sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 6250 Ω
Transconductance: 0.0031 S
Amplification factor: 19.5
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

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Heater current
350 mA
Maximum heater-cathode voltage, heater positive
700 V
Maximum heater-cathode voltage, heater negative
100 V
Plate current
11.8 mA
100VPlate
Plate current
10.5 mA
250VPlate
Maximum plate voltage
330 V
Maximum plate dissipation
3 W
Maximum cathode current
22 mA

Characteristic

Transconductance
3100 uS
100VPlate
Transconductance
2200 uS
250VPlate
Amplification factor
19.5
100VPlate
Amplification factor
17
250VPlate
Plate resistance
6250 ohm
100VPlate
Plate resistance
7700 ohm
250VPlate

Capacitance

Grid-to-plate capacitance
1.5 pF
Section1
Grid-to-plate capacitance
1.5 pF
Section2
Input capacitance
1.6 pF
Section1
Input capacitance
1.6 pF
Section2
Output capacitance
0.5 pF
Section1
Output capacitance
0.4 pF
Section2