ME1403

Subminiature directly heated electrometer pentode with grid current around 3×10⁻¹³ A for measurement of extremely small currents.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 1.25 V / 82 mA

Description

SUBMINIATURE ELECTROMETER PENTODE ME I 03 Subminiature electrometer pentade with a grid current of 3 10-13A, FILAMENT Suitable for d.c. operation only Vi 1.25 v It 82 mA MOUNTING POSITION Any CAPACITANCES Ca_gl 0.2 pF Cin 3.0 pF Cout 4.0 pF CHARACTERISTICS (All voltages are The supplied datasheet publishes electrical ratings and characteristics for this pentode device.

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: 82 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: 0.000105 S
Max plate voltage: 10 V
Max screen voltage: 45 V

Published ratings/characteristics promoted where clearly stated; repeated identical rectifier sections compressed to one section row.

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 La Radiotechnique

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater voltage
1.25 V
Published nominal value
Heater current
82 mA
Published nominal value
Transconductance
105 µS
Published typical/nominal value
Grid current
- to 0.00000000008 mA
Dark condition; published range
Amplification factor
110
Typical value

Data set 02

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater or filament voltage
1.25 V
Heater or filament current
82 mA
MaxPlateVoltage
45
Promoted field source value
MaxScreenVoltage
45
Promoted field source value

Characteristic

Plate Resistance
10500000
Promoted field source value
Transconductance
0.0000105
Promoted field source value