Tube-number record
IB90
0 archive entries
IB90 is a tube type in the TubeDatabase archive (class: Radiation Counter Tube). Recorded specifications: brand Raytheon, construction Other / special, socket Flexible / flying leads, and maximum plate voltage 1100 V. The archive does not yet hold a photographed example of this type.
BrandRaytheon
ClassRadiation Counter Tube
BaseFlexible / flying leads
Construction
Primary TypeOther / special
EnvelopeT6 Glass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1100 V
Audio Performance
Key Features
- All glass
- Thin-wall
- Self-quenching
- Beta radiation detection
- Gamma radiation detection
- Opaque coating to exclude light
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Radiation Counter | — | — | — | — | — |
Application Notes
Designed for use in battery operated survey instruments and Prospector's Units for locating radioactive material.
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