1B86

Small self-quenching glass Geiger-Müller counter for gamma radiation. Designed for portable survey instruments, its compact construction provides practical gamma detection in battery-operated field equipment.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

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

Description

Small self-quenching glass counter tube for gamma radiation, widely used in portable survey instruments.

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

ThresholdVoltage
275 V
Max
Operating Voltage
300 V

Characteristic

PlateauLength
50 V
Minimum
PlateauSlope
30 %/100V
Maximum
RecoveryTime
100 us
Background
20 counts/min