Tube-number record
6250
0 Tubes in archive
BrandMazda
ClassElectrometer Tube
BaseNoval (B9A)
Construction
Primary TypeOther / special
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide
Absolute Maximum Ratings
Plate Voltage9 V
Grid 2 Voltage-2 V
Grid 1 Voltage6 V
Audio Performance
Key Features
- Directly heated filament
- Miniature 9-pin base
- High input impedance
- Low power consumption
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Electrometer Operation | 9 V | 50 | — | — | 0.075 mA |
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