2L35
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BrandTESLA
ClassPentode
BaseMiniature 7-pin
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 | 150V | 2100 | 50000 | - | 14.2mA |
| Class C RF (10 Mc/s) | 150V | - | - | - | 18.5mA |
Application Notes
Can replace 3L35, 3L31, 2L33, 3A4, DL93, DL193 with minor modifications. Negative pole of filament connected to pin -f in series mode.
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