12BW4
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BrandTung-Sol
ClassRectifier
Base9-pin miniature button
Filament12.6V @ 450mA
Construction
Primary TypeDouble Diode
Rectifier TypeFull Wave
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage450 V
H-C Voltage450 V
Audio Performance
Key Features
- Coated Unipotential Cathode
- Miniature Type
- Relatively high output current capabilities
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Capacitor Input Filter | 305V | - | 82 | - | 100mA |
| Choke Input Filter | 450V | - | - | - | 100mA |
Application Notes
Except for heater ratings, it is identical to the 6BW4.
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