Tube-number record
1B25
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1B25 is a tube type in the TubeDatabase archive (class: Protective tube). Recorded specifications: brand RCA, construction Protective tube, and socket Special / none. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassProtective tube
BaseSpecial / none
Construction
Primary TypeProtective tube
EnvelopeBulb
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Cathode Current30 mA
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Conduction | 120 V | — | — | — | 30 mA |
Application Notes
Designed for use as a protective tube. The energy dissipated in the tube should not be sufficient to establish a sustained arc.
Datasheets
Datasheet: 1B25.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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