Tube-number record
6BM8
0 archive entries
6BM8 is a tube type in the TubeDatabase archive (class: Audio Power Pentode / Triode). Recorded specifications: brand Svetlana, year 1996, construction Dual triode, socket Noval (B9A), maximum plate voltage 600 V, and maximum plate dissipation 7 W. The archive does not yet hold a photographed example of this type.
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
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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