Tube-number record
12FQ8
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BrandGeneral Electric
ClassTwin Double-Plate Triode
BaseNoval (B9A)
Filament12.6 V @ 150 mA
Construction
Primary TypeTriode
EnvelopeT-6 1/2 Glass
Sections2
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation0.5 W
H-C Voltage200 V
Audio Performance
Key Features
- Twin double-plate triode
- Separate base pins for each plate
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Each Section, Each Plate | 250 V | 1250 | 76000 | 95 | 1.5 mA |
Application Notes
Miniature twin double-plate triode with each section having a grid and two plates brought out to separate base pins.
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