4212E

High-power directly heated triode for substantial push-pull output service. Approximately 275 W plate dissipation and 3 kV plate capability support output approaching a kilowatt under published push-pull conditions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: GIANT4BAYONET
Base pins: 4
Nominal heater: 14 V / 6.2 A

Description

Directly heated triode. The 4212-E valve employs a molybdenum anode and hard glass bulb. SPECIFICATION. Cathode. Thoriated tungsten filament. Constant voltage type. Base. Extra large 4-pin bayonet. Dimensions. Max. ove

Socket description

Giant 4-contact bayonet base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: GIANT4BAYONET
Base pins: 4
Nominal heater voltage: 14 V
Nominal heater current: 6.2 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

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: 1900 Ω
Transconductance: 0.008400000000000001 S
Amplification factor: 16
Max plate voltage: 3000 V
Max plate dissipation: 275 W
Max cathode current: 350 mA

Explicit alternate/previous designation printed on 3C270A datasheet.

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

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Mutual conductance
8400 µS
Published characteristic; normalized from mA/V

Other

Maximum direct anode current
350 mA
Maximum safe operating rating

Data set 02

1947 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum frequency at full ratings
1.5 MHz
Push-pull power output
960 W
PushPull