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Power - Pentode (NOT beam) ·Pentode

EL3N

Indirectly heated output pentode for conventional Class A audio-frequency power amplification.

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

Description

Indirectly heated output pentode for audio-frequency power amplification, with class-A operating conditions, transconductance, plate resistance, power output, 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
6.1 V
Nominal heater current
-
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
0.009 S

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

  • Heating : indirect; parallel supply Ve

    6.1 V

  • Wo (dtot = 10£)

    4.5 W

  • Vi (Wo

    50 mW

Other

  • Ve

    250 v

    ClassA

  • Vg2

    250 v

    ClassA

  • Vg1

    -6 V

    ClassA

  • I,

    36 mA

    ClassA

  • Ig2

    4 mA

    ClassA

  • Ry = 150 @

    9 mA/V

    ClassA