
Tube-number record
DB1
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DB1 is a tube type in the TubeDatabase archive (class: Medium Impedance Triode). Recorded specifications: brand Mullard, construction Triode, and maximum plate voltage 100 V. The archive does not yet hold a photographed example of this type.
BrandMullard
ClassMedium Impedance Triode
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage100 V
Grid 1 Voltage1 V
Audio Performance
Key Features
- Medium Impedance
- Battery Operated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation 1 | 20 V | 200 | 150000 | 30 | 0.1 mA |
| Typical Operation 2 | 40 V | 400 | 80000 | 32 | 0.25 mA |
Application Notes
Tentative data. Grid voltage limits specified for 1.0 µA grid current.
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