Tube-number record
TH 9840
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BrandTHOMSON-CSF
ClassPyricon Infra-red Pick-up Tube
BaseSpecial / none
Filament6.3 V @ 0.15 mA
Construction
Primary TypeOther / special
Envelope1 inch
SectionsSingle
Filament / Heater
MaterialOxide coated
Warm-up Time300s
Heater NotesUnipotential, indirectly heated
Absolute Maximum Ratings
Plate Voltage500 V
Grid 2 Voltage200 V
Grid 1 Voltage125 V
Cathode Current0.015 mA
H-C Voltage125 V
Audio Performance
Key Features
- Pyroelectric target sensitive to low temperature difference
- Extended infra-red spectral sensitivity
- Electromagnetic focus and deflection
- Germanium input window
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| C.P.S. (Cathode Potential Stabilization) | 250 V | — | — | — | 0.005 mA |
Application Notes
Thermal TV for industrial inspection, security surveillance, medical diagnostics, and environmental protection.
Datasheets
Datasheet: TH9840.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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