ECC32

Medium-mu double triode with separate cathodes for paraphase audio amplification, phase inversion, and multivibrator circuits, with relatively high cathode-current capability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 950 mA

Description

Double triode with separate cathodes for paraphase audio amplifiers, phase inverters, and multivibrator circuits.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 950 mA
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

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 14000 Ω
Transconductance: 0.003 S
Amplification factor: 32
Max plate voltage: 300 V
Max plate dissipation: 5 W
Max cathode current: 50 mA

Two similar triode sections; represented once under identical-section compression.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 14000 Ω
Transconductance: 0.003 S
Amplification factor: 32
Max plate voltage: 300 V
Max plate dissipation: 5 W
Max cathode current: 50 mA

Second 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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Plate voltage
250 V
Grid voltage
-6 V
Plate current
3 mA

Other

Plate voltage maximum
300 V
Plate dissipation maximum
5 W
Cathode current maximum
50 mA

Application

Application
Paraphase AF amplifier / phase inverter / multivibrator

Data set 02

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

la
6 mA
Published in approved ECC32.pdf target datasheet; Section1
gm
2.3 mA
Published in approved ECC32.pdf target datasheet; Section1

Other

Ik max
50 mA
Published in approved ECC32.pdf target datasheet; Section1