Tube-number record
18933
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BrandValvo
ClassDouble Triode
BaseNoval (B9A)
Filament6.3 V @ 0.6 mA
Construction
Primary TypeDual triode
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesSeries or parallel operation
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2 W
Grid 1 Voltage-100 V
Cathode Current30 mA
H-C Voltage100 V
Audio Performance
Key Features
- Shock and vibration resistant
- Long life
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 250 V | 2700 | 10000 | 27 | 6 mA |
Application Notes
Commonly used in industrial equipment and high-fidelity audio preamplifiers.
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