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Power - Pentode Single (NOT beam) (under 10W) ·Pentode

EL1

Power/output pentode designed for audio-frequency power amplification in single-ended or push-pull output stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
P8A
Base pins
8
Nominal heater
6.3 V / 700 mA

Description

Indirectly heated output pentode intended for audio-frequency power amplification, with typical operating characteristics, output-stage data, capacitances, and limiting values.

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
700 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

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
5 W
Max screen dissipation
1.2 W
Max cathode current
32 mA

5 W output pentode

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

Characteristic

  • PENTHODE (

    5 W

  • Heizung intl. Vf

    6.3 V

  • S (Ia

    20 mA

  • Ri (Ia

    20 mA

  • Vgleff (5%)

    5.3 V

  • Vgleff (10%)

    9.6 V

  • Wo (5%)

    0.75 W

  • Wo (10%)

    1.7 W

  • Wg2 max

    1.2 W

  • Vgl (Igi [1]

    0.3 uA

  • Vgl (Igi [2]

    -1.3 V

  • Rgla max

    1 Megohm

  • Rglf max a

    0.6 Megohm

  • Vfk max

    ~ 50 V

  • Va

    250 V

Capacitance

  • Kapazitäten Cag

    1.1 uF

  • Va

    250 V

  • Vg2

    250 V

  • Ia

    20 mA

Other

  • Vgl

    -23 V

  • Ig2 =env

    2 mA

  • S max

    3.5 mA/V

  • Vao max

    400 V

  • VaL max

    250 V

  • Wa max

    5 W

  • Ik max

    32 mA

  • Vg2o max

    400 V

  • Vg2 max

    250 V

  • Ig2 min

    1 mA

  • Ig2 max

    3 mA