6BS7
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BrandBrimar
ClassIndirectly heated screened pentode
BaseB9A (Noval)
Filament6.3V @ 150mA
Construction
Primary TypePentode
EnvelopeT6-1/2 (T64)
SectionsSingle
Filament / Heater
Heater NotesDouble spiral winding to reduce magnetic field
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1.75 W
Grid 2 Voltage125 V
H-C Voltage100 V
Audio Performance
Typical THD5%
Key Features
- Low AF noise
- Low microphony
- Low hum
- Miniature construction
- Internal screening
- Double spiral heater
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 100V | 1100 | 1500000 | 20 | 2mA |
| Pentode | 250V | 1250 | 2400000 | 20 | 2.1mA |
| Triode | 250V | 1720 | 11600 | 20 | 6.5mA |
Application Notes
Intended for early stages of high gain AF amplifiers. Control grid brought to top cap to reduce stray pick-up. Low noise design minimizes shot noise and leakage noise.
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