1B87

Subminiature self-quenching Geiger-Müller counter for gamma radiation detection. Its compact glass construction is suited to small radiation instruments where limited space and low detector mass are important.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Subminiature self-quenching counter tube for gamma radiation detection.

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: -
Nominal heater current: -
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 0

GeigerMullerCounter

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

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 0

GeigerMullerCounter

Other

GeigerThresholdVoltage
850 V
Max
Operating Voltage
900 V
Nominal

Characteristic

PlateauLength
100 V
Minimum
RelativePlateauSlope
10 %/100V
Maximum
Background
20 counts/min
Max