Tube-number record
2L35
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BrandTESLA
ClassPentode
BaseMiniature 7-pin (B7G)
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialGlass
Sections1
Filament / Heater
MaterialOxide
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation2 W
Grid 2 Voltage135 V
Grid 1 Voltage-30 V
Cathode Current25 mA
Audio Performance
Typical THD10%
Power Output0.7 W
Key Features
- Directly heated pentode
- Separately connected suppressor grid (g3)
- Center-tapped filament for series/parallel operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Audio | 150 V | 2100 | 50000 | — | 14.2 mA |
| Class C RF (10 Mc/s) | 150 V | — | — | — | 18.5 mA |
Application Notes
Can replace 3L35, 3L31, 2L33, 3A4, DL93, DL193 with minor modifications. Negative pole of filament connected to pin -f in series mode.
Datasheets
Datasheet: 2L35.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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