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Voltage - Triode (single) ·Triode

4069

Subminiature electrometer triode for linear and logarithmic very-low-current measurement, including operation using a controlled relationship between positive grid current and anode current.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
1.25 V / 14 mA

Description

Electrometer triode for very-low-current measurement. Philips 4069; 4069 ELECTROMETER TUBE Subminiature electrometer triode for linear and logarithmic use with a control- led logarithmic relationship between positive grid current and anode current. QUICK REFERENCE DATA Filament voitage V¢ 1.25 VvV Anode voltage Va

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
14 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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
20000 Ω
Amplification factor
2

Published electrical values are also captured in parameter rows.

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

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Anode current Iy

    100 uA

    Anode current Iy 100 uA

  • Grid current -l <10

    -12 A

    Grid current -l <10-12 A

  • Filament current If

    14 mA

    Filament current If 14 mA

  • Anode to all except grid Ca(g)

    0.8 pF

    Anode to all except grid Ca(g) 0.8 pF

  • Grid to all except anode Cg(a)

    0.5 pF

    Grid to all except anode Cg(a) 0.5 pF

  • Anode to grid Cag

    2 pF

    Anode to grid Cag 2.0 pF

  • Anode voltage Va

    9 v

    Anode voltage Va 9.0 v

  • Grid voltage Vg -2,7 -2.0 0

    3.75 V

    Grid voltage Vg -2,7 -2.0 0 3.75 V

  • Anode current I

    100 MA

    Anode current I 100 MA

  • point 2y (I

    145 uA

    point 2y (I = 145 uA) Vg -1.4 <1.7 V

  • Published electrical value

    3x1079 A

    3x 1079 A, With H, = 3x 1079 A, V, can be set to some value within the

  • range from 3 to

    6 V

    range from 3 to 6 V (nominal 4.4 V) such that I falls by 50 uA when Hg is

  • reduced to 3 x 10~

    12 A

    reduced to 3 x 10~12 A, The initial value of Iy will be found inthe range from