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Voltage Dual Pentode ·Pentode-Pentode

ELL1

Dual output pentode intended for push-pull automobile-receiver audio stages, integrating two matched power sections for compact low-frequency output service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 650 mA

Description

ELL1 is a dual output pentode intended for push-pull automobile-receiver output stages. The supplied Philips datasheet was read for heater data, limiting ratings, characteristic constants, operating conditions, capacitances, and application-specific output data.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
650 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

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Transconductance
0.0018 S
Max plate voltage
250 V
Max plate dissipation
4.5 W

Dual output pentode intended for push-pull automobile-receiver output stages

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Transconductance
0.0018 S
Max plate voltage
250 V
Max plate dissipation
4.5 W

Second identical physical output pentode section; added to align rows with SectionCount.

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

  • Plate dissipation per pentode

    4.5 W

    OneTube

  • Push-pull output power

    5.4 W

    PushPull

  • Distortion at rated push-pull output

    3.7 %

    PushPull

Characteristic

  • Transconductance per pentode

    1800 µS

    OneTube