IM 5
0 Tubes in archive
BrandTelefunken
ClassIonization Manometer Tube
BaseNS 19/38
Construction
Primary TypeTriode Ionization Gauge
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialTungsten (implied)
Absolute Maximum Ratings
Plate Voltage-10 V
Grid 1 Voltage200 V
Cathode Current8 mA
Audio Performance
Key Features
- Directly heated
- Internal filament reservoir for 30 replacements
- Wide connection nozzle to minimize measurement errors
- Ground glass joint NS 19/38 (BN 72242)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Normal Operation | -10V | - | - | - | - |
Application Notes
The tube should only be put into operation once a vacuum of 10^-3 Torr is reached. Electrodes should be degassed via high frequency or electron bombardment (300-500V) until glowing. Electron current during degassing must not exceed 15mA.
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