EL50

High-voltage output pentode designed primarily for Class-B audio power amplification, with published push-pull operating data and plate ratings reaching approximately 800 V.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: P8A
Base pins: 8
Nominal heater: 6.3 V / 1.35 A

Description

EL50 is a high-voltage output pentode for class b audio service. The supplied Philips datasheet was read for heater data, limiting ratings, characteristic constants, operating conditions, capacitances, and application-specific output data.

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: 1.35 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

Max plate voltage: 800 V

High-voltage output pentode for Class B audio service

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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Class B plate supply voltage
800 V
ClassB PushPull
Class B screen supply voltage
400 V
ClassB PushPull
Class B output power
80 W
ClassB PushPull

Characteristic

Anode-grid capacitance
0.8 pF
Maximum