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Voltage Pentode or Tetrode (under 100V) ·Pentode

ME1406

Ultra-low-drain directly heated electrometer-type pentode for sensitive measurement circuits handling minute currents.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
1.25 V / 8.2 mA

Description

Pentode; electrical ratings and operating data extracted from the supplied Mullard datasheet.

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
1.25 V
Nominal heater current
8.2 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
10500000 Ω
Transconductance
0.0000105 S
Max plate voltage
45 V
Max screen voltage
45 V
Max cathode current
0.18 mA

Ratings and characteristics extracted from supplied source.

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

Pentode

Characteristic

  • HeaterOrFilamentVoltage

    1.25 V

  • HeaterOrFilamentCurrent

    8.2 mA

  • Plate Voltage

    10 V

  • Plate Current

    5 uA

  • Grid Voltage

    -2.5 V

  • ScreenVoltageAverage

    6.5 V

  • TransconductanceAverage

    10.5 uS

  • Plate Resistance

    10.5 Mohm

  • GridCurrentAverage

    -0.00000000003 mA

  • ScreenCurrentAverage

    2 uA

  • Plate To Grid Capacitance

    0.2 pF

  • Input Capacitance

    3 pF

  • Output Capacitance

    4 pF