5635

Subminiature medium-mu twin triode intended for Class-A amplifier service, packaging two triode sections in a compact form for space-conscious electronic equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 8DB
Socket code: -
Base pins: 8
Nominal heater: 6.3 V / 450 mA

Description

Subminiature medium-mu twin triode for Class A amplifier service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8DB
Socket code: -
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8DB - 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: 10000 Ω
Transconductance: 0.0038 S
Amplification factor: 38
Max plate voltage: 150 V

Two electrically identical triode sections; one representative section emitted.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 10000 Ω
Transconductance: 0.0038 S
Amplification factor: 38
Max plate voltage: 150 V

Second identical physical triode section; added to align rows with SectionCount.

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

Triode

Capacitance

Input Capacitance
2.6 pF
Output Capacitance
1.6 pF
Grid-to-Plate Capacitance
1.2 pF

Other

Plate Voltage
100 V
ClassA;EachSection
Cathode Resistor
100 ohm
ClassA;EachSection
Plate Current
4.8 mA
ClassA;EachSection