EL51

Power pentode designed for audio and industrial power-amplifier service; unlike the surrounding batch, the available datasheets do not identify it as a television line-output tube.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: P8A
Base pins: 8
Nominal heater: 6.3 V / 1.4 A

Description

Power pentode for audio and industrial power-amplifier service.

Socket description

European 8-pin side-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: P8A
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 1.4 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

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.011 S
Max plate voltage: 800 V
Max screen voltage: 300 V
Max plate dissipation: 25 W

Published maximum ratings/characteristics promoted from source.

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 Tesla

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
1.4 A
Nominal
Maximum Plate Voltage
800 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
25 W

Characteristic

Transconductance
11000 µS
Typical

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Typical plate voltage
500 V
Alternative plate voltage
750 V

Characteristic

Anode-grid capacitance
1.5 pF
Maximum