DL41

Directly heated output pentode for battery receivers with multiple filament connections and documented Class-A and Class-B output conditions. Designed for flexible portable audio power stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 1.4 V / 100 mA

Description

Directly heated output pentode for battery receivers, with multiple filament connections and published Class A and Class B output conditions.

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: 1.4 V
Nominal heater current: 100 mA
Parallel heater voltage: 1.4 V
Parallel heater current: 100 mA
Series capable: Yes

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: 80000 Ω
Transconductance: 0.00255 S
Amplification factor: 10
Max plate voltage: 150 V
Max screen voltage: 150 V
Max plate dissipation: 1.2 W
Max screen dissipation: 0.6 W
Max cathode current: 14 mA

Battery output pentode with multiple filament connections and Class A/Class B operating data.

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

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Plate capacitance
5.3 pF
Grid-to-plate capacitance
- to 0.5 pF

Other

Plate voltage
120 V
ClassA 1.4V 100mA filament
Screen voltage
120 V
ClassA 1.4V 100mA filament
Plate current
10 mA
ClassA 1.4V 100mA filament
Screen current
1.65 mA
ClassA 1.4V 100mA filament
Power output
0.55 W
ClassA 1.4V 100mA filament
Power output
0.475 W
ClassB 84V
Power output
2.1 W
ClassB 150V

Characteristic

Transconductance
2550 uS
ClassA 1.4V 100mA filament
Plate resistance
80 kohm

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Output power at 90 V
0.36 W
ClassA
Output power at 120 V
0.6 W
ClassA
Push-pull Class B output power
2.1 W
ClassB PushPull