Tube-number record
4069
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BrandPhilips
ClassElectrometer Triode
BaseSubminiature
Construction
Primary TypeTriode
EnvelopeSubminiature
SectionsSingle
Filament / Heater
MaterialDirectly Heated
Absolute Maximum Ratings
Plate Voltage25 V
Cathode Current0.25 mA
Audio Performance
Key Features
- Low grid current 2x10^-13 A
- Linear and logarithmic use
- Controlled logarithmic relationship between grid current and anode current
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Linear | 9 V | 80 | — | 2 | 0.1 mA |
Application Notes
To prevent photo emission from the grid, the tube should be operated in darkness or at a low ambient light level. To avoid excessive drift, the filament voltage must be applied before the anode voltage. Soldered connections must be at least 13 mm from the seal.
Datasheets
Datasheet: 4069.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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