Tube-number record
258B
0 archive entries
258B is a tube type in the TubeDatabase archive (class: Rectifier). Recorded specifications: brand Western Electric, construction Rectifier, base Medium two-pin thrust type, socket Special / none, and maximum plate voltage 7500 V. The archive does not yet hold a photographed example of this type.
BrandWestern Electric
ClassRectifier
BaseSpecial / none
Construction
Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
Base MaterialMedium two-pin thrust type
SectionsSingle
Filament / Heater
MaterialMercury vapor type
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Mercury Vapor Operation | 15 V | — | — | — | — |
Application Notes
The tube should be mounted only in a vertical position with the base end down. Sufficient time must be allowed for filament temperature to reach operating value (15 seconds) before anode potential is applied. Preheating of 10-15 minutes is required for new tubes or after reinsertion.
Datasheets
Datasheet: 258B.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results