Tube-number record
25PA91
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BrandTESLA
ClassPhototube
BaseFlexible / flying leads
Construction
Primary TypeOther / special
EnvelopeMiniature
Base MaterialBakelite
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage100 V
Cathode Current0.003 mA
Audio Performance
Key Features
- Gas-filled
- Cesium cathode
- Visible and infrared sensitivity
- Flying leads with color coding
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard operation | 100 V | — | — | — | 0.0015 mA |
Application Notes
Specifically designed for photoelectric measurements and sound adapters in film projectors.
Datasheets
Datasheet: 25PA91.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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