Tube-number record
249B
0 archive entries
249B is a tube type in the TubeDatabase archive (class: Rectifier). Recorded specifications: brand Western Electric, construction Rectifier, socket 4-pin, and maximum plate voltage 7500 V. The archive does not yet hold a photographed example of this type.
BrandWestern Electric
ClassRectifier
Base4-pin
Construction
Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThermionic
Warm-up Time15s
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Rectifier | 15 V | — | — | — | 1500 mA |
Application Notes
The tube should be mounted only in a vertical position with the base end down. Allow 15 seconds warmup time for the filament. For ambient temperatures below 15C, longer warmup times (up to 15 minutes) are required to reach proper mercury vapor pressure.
Datasheets
Datasheet: 249B.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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