Tube-number record
MF 6
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BrandTelefunken
ClassHF-Pentode
BaseSpecial / none
Construction
Primary TypePentode
EnvelopeMetal
Sections1
Filament / Heater
MaterialOxide
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation1 W
Grid 2 Voltage120 V
Cathode Current5 mA
Audio Performance
Key Features
- High frequency amplification up to 5m wavelength
- Directly heated oxide cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF-Verstärkung | 150 V | 950 | 1200000 | 850 | 2 mA |
Application Notes
Short-term fluctuations in heater voltage by more than +/- 0.2 V can endanger the tube.
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