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

DL11

Telefunken directly heated battery output pentode providing approximately 350 mW Class A audio power.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
5
Nominal heater
1.2 V / 50 mA

Description

The Telefunken DL11 is a directly heated battery output pentode with about 350 mW published Class A output.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
5
Nominal heater voltage
1.2 V
Nominal heater current
50 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
Plate resistance
500000 Ω
Transconductance
0.0011 S
Max plate voltage
150 V
Max screen voltage
150 V
Max plate dissipation
1 W

Battery audio 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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    120 V

    ClassA

  • Screen Voltage

    120 V

    ClassA

  • Plate Current

    4.7 mA

    ClassA

  • Load Resistance

    22000 ohm

    ClassA

  • Power Output

    0.35 W

    ClassA