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2C22

General-purpose receiving triode for voltage amplification, detection, oscillator, or Class-A service as documented by the manufacturer.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 4AM
Socket code: -
Base pins: 4
Nominal heater: 6.3 V / 300 mA

Description

Medium-mu 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: 4AM
Socket code: -
Base pins: 4
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

4AM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 6600 Ω
Transconductance: 0.003 S
Amplification factor: 20
Max plate voltage: 300 V

Promoted from the printed maximum-rating/characteristic columns; additional operating-point and capacitance data are 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

Triode

Capacitance

Input capacitance
2.2 pF
Section1
Output capacitance
0.7 pF
Section1
Grid-to-plate capacitance
3.6 pF
Section1

Other

Plate voltage
300 V
ClassA
Control-grid voltage
-10.5 V
ClassA
Plate current
11 mA
ClassA

Characteristic

Plate resistance
6600 Ω
ClassA
Transconductance
3000 µS
ClassA
Amplification factor
20
ClassA