ET51

Ultra-fast beam-switching decade counter tube for scalers and analyzers. Electron-beam steering performs rapid decimal counting and selection.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 300 mA

Description

Ultra-fast beam-switching decade counter tube for scalers and analyzers.

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: 6.3 V
Nominal heater current: 300 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

CounterSelectorSwitch

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted only where the locked section schema has a direct semantic match; additional IF/RF, audio-output, tuning-indicator, rectifier, damper, pulse, capacitance, and counter data are retained in TUBE_SECTION_PARAMETER.

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 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

CounterSelectorSwitch

Characteristic

Maintaining voltage target
100 V
BeamSwitchingCounter
Maintaining voltage switching electrode
100 V
BeamSwitchingCounter

Other

Cathode current target
5 mA
BeamSwitchingCounter
Maximum counting rate
1000 kHz
BeamSwitchingCounter
Grid bias
25 V
BeamSwitchingCounter
Application
Ultra-fast beam-switching decade counter for scalers and analyzers
Section1