Tube-number record
1229
0 archive entries
1229 is a tube type in the TubeDatabase archive (class: Filamentary tetrode electrometer tube). Recorded specifications: brand Sylvania, construction Tetrode, base Phenolic, and socket 4-pin. The archive does not yet hold a photographed example of this type.
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
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.
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