Tube-number record
4B25
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4B25 is a tube type in the TubeDatabase archive (class: Full-wave Rectifier). Recorded specifications: brand Electrons, Inc., construction Other / special, socket Screw / Edison base, and maximum plate voltage 150 V. The archive does not yet hold a photographed example of this type.
BrandElectrons, Inc.
ClassFull-wave Rectifier
BaseScrew / Edison base
Construction
Primary TypeOther / special
Rectifier TypeFull-wave
EnvelopeGlass
Sections2
Filament / Heater
MaterialHeat shielded cathode
Warm-up Time120s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Full-wave Rectifier | 150 V | — | — | — | 5000 mA |
Application Notes
The EL 5B Heavy Duty has a much larger heat shielded cathode than the EL 5B Standard and is designed for service where the load fluctuates violently, or where exceptionally long life is desired. Load and filament voltage may be applied simultaneously without immediate damage, but life is materially shortened by each such cold start.
Datasheets
Datasheet: 4B25.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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