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Voltage - Triode (single) ·Triode

VX33A

Subminiature low-filament-power triode for DC voltage amplifiers and measuring instrumentation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
1.25 V / 10 mA

Description

Subminiature low-filament-power triode for DC voltage amplifiers and measuring instrumentation. The same source also identifies this device as VX33A.

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
10 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
Transconductance
0.00015 S
Amplification factor
30
Max cathode current
0.3 mA

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

1950 Victoreen

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Filament Voltage

    1.12 to 1.5 V

  • Filament Current

    10 mA

    Nominal

  • LeakageResistance

    100000000000000 ohm

    GridToAllOtherElements

  • Transconductance

    150 umho

  • Amplification Factor

    30

Other

  • Plate Current

    100 to 300 uA

    Ef=1.25V Eb=135V Ec=-5V