Tube-number record
6H7C
1 archive entry
ClassDouble triode
BaseOctal
Filament6.3 V @ 810 mA
Construction
Primary TypeTriode
Envelopeglass
Sectionsdouble
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation5.5 W
H-C Voltage100 V
Audio Performance
Power Output4.2 W
Key Features
- Glass bulb
- Indirectly heated cathode
- Oxide-coated cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Both triodes in parallel | 294 V | 3400 | — | 35 | 65 mA |
| Each triode | 300 V | — | — | — | 17.5 mA |
Application Notes
Designed for amplification of low-frequency power. Resistant to ambient temperature from -60 to +70°C and relative humidity of 95 to 98% at +40°C.