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Power - Pentode (NOT beam) ·Pentode

E34L

E34L/EL34-family audio-frequency output pentode. Manufacturer documentation identifies it as a dedicated power-output tube for low-frequency amplifier stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 1.5 A

Description

The source identifies this device as EL34, E34L a. f. output pentode.

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
1.5 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
Plate resistance
15000 Ω
Transconductance
0.011 S
Amplification factor
11
Max plate voltage
800 V
Max screen voltage
450 V
Max plate dissipation
25 W
Max screen dissipation
8 W
Max cathode current
150 mA

Promoted from published typical characteristics and limiting values in E34L.pdf; repeated identical physical sections are compressed where applicable.

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

2026 JJ Electronic

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Uf

    6.3 V

    Published value

  • If

    1.5 A

    Published value

Characteristics

  • Ua

    250 V

    Published value

  • Ug3

    0 V

    Published value

  • Ug2

    265 V

    Published value

Characteristic

  • Ia

    100 mA

    Published value

  • Ig2

    14.9 mA

    Published value

  • S

    11000 µS

    Published value

  • Ri

    15 kΩ

    Published value

  • µg2/g1

    11

    Published value