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Voltage Pentode or Tetrode (under 100V) ·Diode-Pentode

DAF961

Battery-operated diode-pentode combining a detector diode with a low-frequency amplifier pentode. Its 1.2 V, 60 mA directly heated filament and low operating currents suit economical portable receiver service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
1.2 V / 60 mA

Description

Battery diode-pentode for detector and low-frequency amplifier service.

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
60 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

Diode

X-ray radiationInterelectrode capacitances
Max plate voltage
90 V
Max cathode current
0.2 mA
Rectifier peak inverse voltage
50 V
Rectifier nominal output current
0.2 mA

Published ratings and characteristics promoted from the printed technical data.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
600000 Ω
Transconductance
0.0007 S
Max plate voltage
90 V
Max screen voltage
90 V
Max plate dissipation
0.15 W
Max screen dissipation
0.05 W
Max cathode current
2.5 mA

Published ratings and characteristics promoted from the printed technical 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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • HeaterVoltageNominal

    1.2 V

    Nominal

  • HeaterCurrentNominal

    60 mA

    Nominal

  • Maximum Peak Inverse Voltage

    50 V

  • Rectified Output Current

    0.2 mA

SECTION 2

Pentode

Other

  • HeaterVoltageNominal

    1.2 V

    Nominal

  • HeaterCurrentNominal

    60 mA

    Nominal

  • Maximum Plate Voltage

    90 V

  • Maximum Screen Voltage

    90 V

  • Maximum Plate Dissipation

    0.15 W

  • Maximum Screen Dissipation

    0.05 W

  • Maximum Cathode Current

    2.5 mA