RE 78
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BrandTelefunken
ClassTriode
BaseTelefunken-Sockel
Construction
Primary TypeTriode
EnvelopeGlass with internal metal coating
Base MaterialBakelite/Metal
SectionsSingle
Filament / Heater
MaterialThorium
Absolute Maximum Ratings
Plate Voltage90 V
Audio Performance
Key Features
- Very low filament current consumption
- Thorium filament
- Internal metal coating for vacuum maintenance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF/Audion/LF | 90V | - | - | - | - |
Application Notes
Suitable for HF and Audion stages as well as LF amplification, provided high power output is not required for loudspeakers.
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