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Tube Database (7,341 tube types · 1,270 archive entries)

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Tube-number record

IB90

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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

ModePlate VGm (µmhos)Rp (Ω)µPlate 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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