Tube-number record
12SR7
0 archive entries
12SR7 is a tube type in the TubeDatabase archive (class: Duplex-Diode Triode). Recorded specifications: brand General Electric, construction Triode, base Phenolic, socket 8-pin, maximum plate voltage 250 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassDuplex-Diode Triode
Base8-pin
Filament12.6 V @ 150 mA
Construction
Primary TypeTriode
EnvelopeMT-8 Metal Shell
Base MaterialPhenolic
SectionsDuplex-Diode Triode
Filament / Heater
Heater NotesA-C or D-C
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250 V | 1900 | 8500 | 16 | 9.5 mA |
Application Notes
The d-c resistance in the grid circuit should not exceed 1.0 megohm under rated maximum conditions. Cathode is coated unipotential.
Datasheets
Datasheet: 12SR7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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