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Tube Database (7,341 tube types · 1,270 archive entries)

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SR 5 vacuum tube outline illustration

Tube-number record

SR 5

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SR 5 is a tube type in the TubeDatabase archive (class: Voltage reference tube). Recorded specifications: brand Cerberus, construction Other / special, socket Miniature 7-pin (B7G), and maximum plate voltage 115 V. The archive does not yet hold a photographed example of this type.

BrandCerberus
ClassVoltage reference tube
BaseMiniature 7-pin (B7G)

Construction

Primary TypeOther / special
EnvelopeGlass
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage115 V
Cathode Current10 mA

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Stabilizer87 V———5.5 mA

Application Notes

The anode AZ may be used as firing anode: a small current in this anode causes firing of the main anode when the applied voltage exceeds the stabilized voltage by a few volts. Stabilizing range 1-10 mA.

Datasheets

Datasheet: SR5.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    Audio Performance

    Key Features
    • Molybdenum cathode
    • High stability
    • Freedom of flickering
    • Extremely long life