Tube-number record
12F8
0 archive entries
12F8 is a tube type in the TubeDatabase archive (class: Double detector diode and remote cutoff pentode). Recorded specifications: brand SYLVANIA, construction Pentode, socket Noval (B9A), and maximum plate voltage 30 V. The archive does not yet hold a photographed example of this type.
BrandSYLVANIA
ClassDouble detector diode and remote cutoff pentode
BaseNoval (B9A)
Filament12.6 V @ 150 mA
Construction
Primary TypePentode
EnvelopeT6 1/2
SectionsTriple (Pentode + 2 Diodes)
Filament / Heater
Heater NotesDesigned to operate over 10.0 to 15.9 volt range for automotive service.
Absolute Maximum Ratings
Plate Voltage30 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| AF Voltage Amplifier | 12.6 V | 1000 | 330000 | — | 1 mA |
Application Notes
The Sylvania Type 12F8 is a double detector diode and remote cutoff pentode with a common cathode. The pentode was designed for service as an AF voltage amplifier where the potentials are obtained from a 12 volt automobile storage battery.
Datasheets
Datasheet: 12F8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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