Tube-number record
SR 52
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SR 52 is a tube type in the TubeDatabase archive (class: Voltage Reference Tube). Recorded specifications: construction Other / special, socket Miniature 7-pin (B7G), and maximum plate voltage 130 V. The archive does not yet hold a photographed example of this type.
ClassVoltage Reference Tube
BaseMiniature 7-pin (B7G)
Construction
Primary TypeOther / special
EnvelopeMiniature
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage130 V
Cathode Current10 mA
Audio Performance
Key Features
- Molybdenum cathode
- Extremely long life
- High stability
- Freedom of flickering
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Stabilizer | 82.6 V | — | 140 | — | 4.5 mA |
Application Notes
Stabilizing range 3.5-6.0 mA. Breakdown voltage is independent of light/darkness. For long life, limit starting current to 30s max and fewer than 2 starts per day. Mounting in any position.
Datasheets
Datasheet: SR52.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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