Data set 01
1953 Amperex
Published operating points and test conditions from this source.
SECTION 1
GeigerMullerCounter
Characteristics
Operating voltage
1150 V
Plateau minimum
300 V
Dead time approximate
200 us
Specialized - Radiation Counter ·GeigerMullerCounter
1B73
Gas-filled Geiger-Müller radiation counter for pulse-counting detection. Manufacturer information available in this pass supports the general counter role but not a more specific radiation type or application.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- -
Description
1B73 Gamma Counter Tube
The 1B73 is a gas-filled gamma counter tube designed for radiation detection applications. Sponsored by the Amperex Electronic Corporation, the device features a copper cathode, an argon and quenching vapor filling, and is designed for high-voltage operation.
Construction and Physical Specifications
The 1B73 is constructed with a copper cathode. The effective dimensions of this cathode are 8 inches in length, with an outside diameter (O.D.) of 1 inch and a wall thickness of 1/16 inch.
The physical dimensions of the tube assembly are as follows:
- Overall Length: 9-5/8 inches ± 3/16 inch
- Cathode Diameter: 1.062 inches ± 0.007 inch
- End Cap Diameters: 0.562 inch ± 0.007 inch
Electrical connections are made directly to the end caps. The anode terminal is located on one end cap, while the opposite end cap is colored black and has no electrical connection.
Electrical and Operating Characteristics
The tube is designed to operate under high-voltage direct-current conditions across a wide temperature range. Its primary electrical and operating parameters include:
- Operating Voltage: 1150 V D.C.
- Operating Temperature Range: -20°C to +100°C
- Capacity at Terminals: 3.6 mmf
- Cosmic Ray Efficiency: Greater than 99%
- Background (Unshielded): 200 counts per minute
- Life Expectancy: Greater than 10^8 counts
Plateau and Dead Time Parameters
The 1B73 exhibits a plateau in excess of 300 V. The slope of this plateau and the dead time of the tube have both registered and proposed values:
| Parameter | Registered Value | Proposed Value (1949) |
|---|---|---|
| Slope of Plateau | 2% to 5% per 100 V | 5% per 100 V maximum |
| Dead Time | 200 µs | Approximately 100 µs |
Technical Summary
The 1B73 is a copper-cathode, argon-and-quenching-vapor-filled gamma counter tube. Operating at a nominal 1150 V D.C., it offers a plateau exceeding 300 V, a terminal capacity of 3.6 mmf, and a cosmic ray efficiency of over 99%. With an overall length of 9-5/8 inches and a robust operating temperature range of -20°C to +100°C, the 1B73 provides reliable radiation detection performance with a life expectancy exceeding 10^8 counts.
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 1
GeigerMullerCounter
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Counter-tube source does not publish ordinary active-electrode promoted fields; counter performance is retained in parameters.
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.