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

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Tube-number record

18509/02

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BrandPHILIPS
ClassMicro Radiation Counter Tube
BaseFlexible / flying leads

Construction

Primary TypeOther / special
EnvelopeMetal Wall
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage650 V

Audio Performance

Key Features
  • Self quenching
  • Measurement of gamma and high-energy beta radiation
  • Low capacitance mounting
  • Small dimensions

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Operating Plateau500 V—2000000——

Application Notes

Low capacitance mounting of the counter tube is required (short connections). Because of the small thickness of the cathode wall (0.1 mm) utmost care should be taken at handling the tube. In order to prevent leakage the tube should be kept dry and well cleaned.

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