Tube-number record
1L5-G
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BrandRadiotron
ClassPower Amplifier Pentode
BaseOctal
Construction
Primary TypePentode
EnvelopeS8T-14
Base MaterialMedium shell Octal 7-Pin
SectionsSingle
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage180 V
Plate Dissipation1.8 W
Grid 2 Voltage180 V
Cathode Current13 mA
Audio Performance
Typical THD10%
Power Output0.75 W
Key Features
- Coated Filament
- Horizontal operation permitted if pins 2 and 7 are in vertical plane
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Connection | 90 V | 1830 | 175000 | — | 3.6 mA |
| Pentode Connection | 135 V | 2150 | 150000 | — | 6 mA |
| Pentode Connection | 180 V | 2400 | 137000 | — | 9.5 mA |
Application Notes
The d-c resistance in the grid circuit should be limited to 1.0 megohm.
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