1L4
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BrandBrimar
ClassPentode
BaseMiniature 7-Pin
Construction
Primary TypeR.F. Pentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialDirectly Heated
Absolute Maximum Ratings
Plate Voltage110 V
Grid 2 Voltage90 V
Cathode Current6.5 mA
Audio Performance
Key Features
- Miniature battery
- Low filament current
- R.F. or I.F. amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF/IF Amplifier Operation 1 | 90V | 930 | 600000 | - | 2.9mA |
| RF/IF Amplifier Operation 2 | 90V | 1030 | 350000 | - | 4.5mA |
Application Notes
Suitable for R.C. coupled A.F. amplifier operation. Grid return should be made to negative filament (pin 1) via a resistance of at least 0.5 meg to minimize variations due to contact potential.
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