Tube-number record
1229
0 archive entries
BrandSylvania
ClassFilamentary tetrode electrometer tube
Base4-pin
Construction
Primary TypeTetrode
EnvelopeST-12
Base MaterialPhenolic
Filament / Heater
Absolute Maximum Ratings
Audio Performance
Key Features
- exceptionally low grid current
- electrostatic shielding
- light shielding
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| DC Voltage Amplifier | 45 V | — | — | — | 0.00033 mA |
Application Notes
Tube shielded from all light and external electrical influences.
Datasheets
Datasheet: 1229.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results