Tube-number record
12SG7
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12SG7 is a tube type in the TubeDatabase archive (class: Radio-Frequency-Amplifier Pentode). Recorded specifications: brand General Electric, construction Pentode, base Phenolic, socket Octal, maximum plate voltage 330 V, and maximum plate dissipation 3.3 W. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassRadio-Frequency-Amplifier Pentode
BaseOctal
Filament12.6 V @ 150 mA
Construction
Primary TypePentode
EnvelopeMT-8 Metal Shell
Base MaterialPhenolic
SectionsSingle
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 | 100 V | 4100 | 250000 | — | 8.2 mA |
| Class A Amplifier | 250 V | 4700 | 1000000 | — | 11.8 mA |
| Class A Amplifier | 250 V | 4000 | 1100000 | — | 9.2 mA |
Application Notes
The dual cathode connection provides a method for reducing undesirable coupling between cathode circuits.
Datasheets
Datasheet: 12SG7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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