EL34II

Audio-frequency EL34-family output pentode for conventional power-amplifier service.

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 II 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

Transconductance: 0.011 S
Max plate voltage: 250 V
Max screen voltage: 265 V

Promoted from published typical characteristics and limiting values in EL34II.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
Ug1
-13.5 V
Published value
Ia
100 mA
Published value
Ig2
14.9 mA
Published value

Capacitance

Ri
15 kΩ
Published value
µg2/g1
11
Published value
ca/g1
1.3 pF
Published value