5901

Remote- or semi-remote-cutoff pentode designed for RF, IF, variable-mu, or controlled-gain amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8DL
Socket code: B8D
Base pins: 8
Nominal heater: 6.3 V / 150 mA

Description

Subminiature semi-remote-cutoff RF pentode capable of UHF operation and designed for stable service under severe conditions.

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8DL
Socket code: B8D
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8DL - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN2G3	A	G3 — Suppressor GridGroup 8DL2 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN2K	A	K — CathodeGroup 8DL2 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN3H	—	H — Heater EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN4G3	A	G3 — Suppressor GridGroup 8DL4 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN4K	A	K — CathodeGroup 8DL4 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN5P	A	P — Plate (Anode) EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN6H	—	H — Heater EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN7G2	A	G2 — Screen Grid EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN8G3	A	G3 — Suppressor GridGroup 8DL8 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL
PIN8K	A	K — CathodeGroup 8DL8 EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DL

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 230000 Ω
Transconductance: 0.005 S
Max plate voltage: 165 V
Max screen voltage: 155 V
Max plate dissipation: 1.1 W

Promoted from clearly identified printed ratings/characteristics; additional published operating points, capacitances, and specialized ratings retained in TUBE_SECTION_PARAMETER.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Input capacitance
4.2 pF
Section1
Output capacitance
3.4 pF
Section1
Grid-to-plate capacitance
0.015 pF
Section1

Other

Plate voltage
100 V
ClassA
Screen voltage
100 V
ClassA
Cathode resistor
150 Ω
ClassA
Plate current
7.5 mA
ClassA
Screen current
2.4 mA
ClassA

Characteristic

Plate resistance
230000 Ω
ClassA
Transconductance
5000 µS
ClassA