7C4

High-frequency dual-diode tube with published rectifier-service ratings. Its compact construction supports low-current rectification, though available source data do not justify a narrower specialized functional assignment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 4AH
Socket code: -
Base pins: 8
Nominal heater: 6.3 V / 150 mA

Description

High-frequency diode with published half-wave rectifier service ratings.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 4AH
Socket code: -
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

4AH - 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

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 5 mA
Rectifier forward voltage drop: 11 V

Promoted from printed maximum/characteristic columns; additional published values are retained in TUBE_SECTION_PARAMETER.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 5 mA
Rectifier forward voltage drop: 11 V

Second physical rectifier section; electrical properties populated from corresponding identical section.

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

Rectifier

Characteristic

Tube voltage drop
11 V
At10mADC

Other

DC output current maximum
5 mA
HalfWave
RMS supply voltage maximum
117 V
HalfWave

SECTION 2

Rectifier

Characteristic

Tube voltage drop
11 V
At10mADC

Other

DC output current maximum
5 mA
HalfWave
RMS supply voltage maximum
117 V
HalfWave