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IM 1

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BrandTelefunken
ClassIonization Manometer Tube

Construction

Primary TypeTriode
EnvelopeOsram-Glas
SectionsSingle

Filament / Heater

MaterialDirekt geheizt

Absolute Maximum Ratings

Plate Voltage-10 V
Grid 1 Voltage200 V
Cathode Current8 mA

Audio Performance

Key Features
  • Direkt geheizt
  • Messen hoher Vakua
  • Geniügend weiter Anschlußstutzen
  • Reiner Sättigungsstrombetrieb

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Ionisationsmanometer-10V---1mA

Application Notes

The tube must be degassed (baked out) before operation. Recommended bake-out at 410°C for at least one hour. Electrodes can be degassed via HF or electron bombardment (300-500V). Maximum electron current during degassing must not exceed 15mA.

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