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

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18509 vacuum tube outline illustration

Tube-number record

18509

0 archive entries

18509 is a tube type in the TubeDatabase archive (class: Micro Radiation Counter Tube). Recorded specifications: brand Philips, construction Other / special, socket Flexible / flying leads, and maximum plate voltage 550 V. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassMicro Radiation Counter Tube
BaseFlexible / flying leads

Construction

Primary TypeOther / special
EnvelopeMetal
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage550 V

Audio Performance

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Counter Operation450 V—10000000——

Application Notes

Because of the small thickness of the cathode wall (0.1 mm) utmost care should be taken when handling the tube. In order to prevent leakage the tube should be kept dry and well cleaned.

Datasheets

Datasheet: 18509.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    Key Features
    • Self quenching
    • Gamma radiation measurement
    • High-energy beta radiation measurement
    • Halogen filled
    • Low capacity mounting required