RL4,2P6
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BrandTelefunken
ClassPentode
BaseDurchsteckfassung or Aufsteckfassung
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialOxydkathode, direkt geheizt
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation7.5 W
Grid 2 Voltage250 V
Cathode Current50 mA
Audio Performance
Typical THD10%
Power Output3 W
Key Features
- Directly heated
- Center-tapped filament
- Short/Ultra-short wave capable (up to 2m)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| NF-Endverstarker (150V) | 150V | 6000 | - | - | 35mA |
| NF-Endverstarker (200V) | 200V | 6000 | - | - | 35mA |
Application Notes
Heater can be used at 2.1V in parallel configuration. Series connection of 3 tubes with a 12.6V battery is permitted with specific resistor balancing.
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