6CA4EH

Modern 6CA4/EZ81-type two-plate full-wave rectifier with a common indirectly heated cathode. Designed for center-tapped AC rectification in receiving and audio-amplifier power supplies from a 6.3 V heater.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 1 A

Description

Two-plate full-wave rectifier with a common indirectly heated cathode for center-tapped AC rectification.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 1 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

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 100 mA

Representative section for two identical full-wave rectifier plates.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 100 mA

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

2026 Electro Harmonix

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

DiodePlateCurrent
100 mA
Plate 17 V; heater 6.3 V