Tube-number record
8D8
0 archive entries
8D8 is a tube type in the TubeDatabase archive (class: Amplifier Pentode). Recorded specifications: brand BRIMAR, year 1960, construction Pentode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.
BrandBRIMAR
ClassAmplifier Pentode
BaseNoval (B9A)
Filament6.3 V @ 150 mA
Construction
Primary TypePentode
EnvelopeMiniature
SectionsSingle
Filament / Heater
Heater NotesLow hum construction
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Characteristic | 250 V | 1900 | 2500000 | — | 3 mA |
Application Notes
Specifically designed for use in the early stages of high gain A.F. amplifiers.
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