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Power - Triode ·Triode-Triode

DDD11

Directly heated Telefunken dual output triode designed for Class-B push-pull battery amplification, providing audio power output in portable equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
1.2 V / 100 mA

Description

The Telefunken DDD11 is a directly heated dual output triode intended for Class B push-pull battery amplification.

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
1.2 V
Nominal heater current
100 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

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
150 V

Representative of two output-triode sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
150 V

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

Triode

Other

  • Plate Voltage

    120 V

    ClassB; PushPull; TwoTubes

  • Quiescent Plate Current

    1.5 mA

    ClassB; per section

  • Full-Signal Plate Current

    5.5 mA

    ClassB; per section

  • Power Output

    1.4 W

    ClassB; PushPull; TwoTubes

  • Plate-to-Plate Load Resistance

    14000 ohm

    ClassB; PushPull