Tube-number record
6BM8
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BrandSvetlana
ClassAudio Power Pentode / Triode
BaseNoval (B9A)
Filament6.3 V @ 780 mA
Construction
Primary TypeDual triode
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesIndirectly-heated oxide cathode
Absolute Maximum Ratings
Plate Voltage600 V
Plate Dissipation7 W
Grid 2 Voltage300 V
Cathode Current50 mA
H-C Voltage100 V
Audio Performance
Power Output1.8 W
Key Features
- High performance audio
- Dual package contains power pentode and triode
- Low power mono block amplifier capability
- Excellent ultra linear configuration choice
- Direct replacement for ECL82
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 300 V | 2500 | 150000 | 70 | 1.1 mA |
| Pentode Section | 300 V | 6400 | 7000 | 9.5 | 40 mA |
Application Notes
The Svetlana 6BM8 is ideal for economical low-power mono block amplifiers or as a driver for higher power tubes like the SV811 or SV572 series triodes. Its indirectly-heated cathode can be DC operated to minimize hum and noise.
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