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5801

Victoreen 5801 (VX-33A) directly heated subminiature high-mu triode for low-power DC amplification in radiation-measuring instruments.

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.

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: 0.5 mA

Victoreen 5801 VX-33A high-mu instrument DC triode. Direct filament 1.25 V 10 mA (1.12–1.5 V), max total cathode current 500 µA, leakage resistance grid-to-all >=10^14 Ω. At plate 135 V and grid -2 V plate current 100–300 µA (nominal 200 µA), at grid -5 V <=1 µA. Nominal gm 0.00015 A/V and mu 30. Plate 135 V is a test point, not max rating.

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