Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage Tetrode ·Tetrode

DAS1

Directly heated screened tetrode with low-voltage operating data. Its economical filament and screened construction suit low-power receiving circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2 V / 60 mA

Description

Compact directly heated screened tetrode with tentative characteristics, including 120 V plate operation, 45 to 60 V screen voltage and sub-milliampere to low-milliampere anode current.

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
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

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
500000 Ω
Transconductance
0.00058 S
Max plate voltage
120 V
Max screen voltage
60 V

Screened tetrode; promoted characteristics from 120/60 V operating point.

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 Mullard

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Anode voltage

    120 V

    Va=120 V; Vg2=45 V

  • Screen voltage

    45 V

    Va=120 V; Vg2=45 V

  • Control-grid voltage

    -2 V

    Va=120 V; Vg2=45 V

  • Anode current

    0.8 mA

    Va=120 V; Vg2=45 V

  • Anode voltage

    120 V

    Va=120 V; Vg2=60 V

  • Screen voltage

    60 V

    Va=120 V; Vg2=60 V

  • Control-grid voltage

    -2.7 V

    Va=120 V; Vg2=60 V

  • Anode current

    1.5 mA

    Va=120 V; Vg2=60 V

  • Plate voltage maximum

    120 V

  • Screen voltage maximum

    60 V

  • Grid resistance maximum

    2 Mohm

Characteristic

  • Transconductance

    430 uS

    Va=120 V; Vg2=45 V

  • Plate resistance

    650000 ohm

    Va=120 V; Vg2=45 V

  • Transconductance

    580 uS

    Va=120 V; Vg2=60 V

  • Plate resistance

    500000 ohm

    Va=120 V; Vg2=60 V

Capacitance

  • Anode-grid capacitance

    0.07 pF

  • Output capacitance

    3.4 pF