Tube-number record
12BR7
0 archive entries
12BR7 is a tube type in the TubeDatabase archive (class: High Mu Triode Duo Diode). Recorded specifications: brand Sylvania, construction Triode, base Small Button 9-Pin, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassHigh Mu Triode Duo Diode
BaseNoval (B9A)
Filament12.6 V @ 225 mA
Construction
Primary TypeTriode
EnvelopeT6 1/2
Base MaterialSmall Button 9-Pin
SectionsTriode-Duo-Diode
Filament / Heater
Heater NotesSeries/Parallel
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (1) | 100 V | 4000 | 15000 | 60 | 3.7 mA |
| Class A Amplifier (2) | 250 V | 5500 | 10900 | 60 | 10 mA |
Datasheets
Datasheet: 12BR7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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