Tube-number record
405
0 archive entries
405 is a tube type in the TubeDatabase archive (class: Vacuum Tube). Recorded specifications: maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
ClassVacuum Tube
Filament6.3 V @ 300 mA
Construction
Filament / Heater
Heater NotesCT+CT Configuration
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 250 V | — | — | — | — |
Application Notes
Center-tapped heater configuration (CT+CT) observed in specifications.
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