Tube-number record
B240
0 archive entries
B240 is a tube type in the TubeDatabase archive (class: Duotriode). Recorded specifications: brand Philips Miniwatt, construction Triode, socket Special / none, and maximum plate voltage 150 V. The archive does not yet hold a photographed example of this type.
BrandPhilips Miniwatt
ClassDuotriode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass
SectionsDouble
Filament / Heater
Absolute Maximum Ratings
Plate Voltage150 V
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B | 150 V | — | — | — | 8 mA |
| Class B | 120 V | — | — | — | 4.5 mA |
Application Notes
Requires driver stage (e.g. B217) via transformer with 3:(1+1) ratio. Not suitable for resistance coupling due to grid current.
Datasheets
Datasheet: B240.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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