13D8
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BrandBrimar
ClassA.F. Double Triode
BaseB9A
Filament6.3V @ 300mA
Construction
Primary Typetriode
Envelopeglass
Sectionsdouble
Filament / Heater
Heater NotesSeries or parallel connection
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.75 W
Cathode Current20 mA
H-C Voltage100 V
Audio Performance
Key Features
- low-mu
- improved anode current balance between sections
- similar to 12AU7
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Each Section | 250V | 2200 | 7700 | 17 | 10.5mA |
Application Notes
Resistance coupled amplifier operation shows stage gains of 11-12 at supply voltages of 100V-250V.
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