Tube-number record
12BW4
0 archive entries
12BW4 is a tube type in the TubeDatabase archive (class: Rectifier). Recorded specifications: brand Tung-Sol, year 1955, construction Diode, socket Noval (B9A), and maximum plate voltage 450 V. The archive does not yet hold a photographed example of this type.
BrandTung-Sol
ClassRectifier
BaseNoval (B9A)
Filament12.6 V @ 450 mA
Construction
Primary TypeDiode
Rectifier TypeFull Wave
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Capacitor Input Filter | 305 V | — | 82 | — | 100 mA |
| Choke Input Filter | 450 V | — | — | — | 100 mA |
Application Notes
Except for heater ratings, it is identical to the 6BW4.
0 results