1B85
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BrandVictoreen
ClassBeta Gamma Counter Tube
BaseRETMA type Al-82 coaxial
Construction
Primary TypeMetal Wall Geiger-Mueller Counter Tube
EnvelopeThin-walled Aluminum Shell
Base MaterialMetal
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage950 V
Audio Performance
Key Features
- Metal wall
- Self-quenching gas fill
- Interchangeable with 900 volt counter tubes
- Shock and vibration resistant
- Thin-walled aluminum shell
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Geiger Counting | 900V | - | - | - | - |
Application Notes
Widely used in portable survey instruments, area monitoring, and precision laboratory measuring equipment. Ideally suited for multiple tube counters and coincidence circuits.
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