6F21
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BrandEdiswan
ClassVariable Mu H.F. Pentode
BaseB7G
Filament6.3V @ 200mA
Construction
Primary TypePentode
EnvelopeClear
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated for parallel operation
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation3 W
Grid 2 Voltage300 V
H-C Voltage150 V
Audio Performance
Key Features
- Variable Mu
- Miniature based
- Indirectly heated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condition 1 | 250V | 2500 | 1200000 | - | 4.9mA |
| Condition 2 | 250V | 2500 | 1200000 | - | 7.8mA |
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