Tube-number record
25Z5
0 archive entries
25Z5 is a tube type in the TubeDatabase archive (class: Rectifier-Doubler). Recorded specifications: brand RCA, construction Rectifier, socket 6-pin, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassRectifier-Doubler
Base6-pin
Filament25 V @ 300 mA
Construction
Primary TypeRectifier
Rectifier TypeFull-wave
EnvelopeST-12
SectionsDual
Filament / Heater
Heater NotesA.C. or D.C.
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Voltage Doubler | 125 V | — | — | — | 100 mA |
| Half-Wave Rectifier | 125 V | — | — | — | 85 mA |
| Half-Wave Rectifier (with series resistor) | 250 V | — | — | — | 85 mA |
Application Notes
On a-c input voltage above 125 volts, it is necessary to connect a 100 ohm resistor in series with each plate lead, or a 100 ohm resistor common to both plates. Sufficient ventilation should be provided to circulate air freely around the tube to prevent overheating.
Datasheets
Datasheet: 25Z5.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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