Tube-number record
12J5GT
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12J5GT is a tube type in the TubeDatabase archive (class: General Purpose Amplifier Triode). Recorded specifications: brand Ken-Rad, construction Triode, base Intermediate shell octal, socket Octal, maximum plate voltage 300 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
BrandKen-Rad
ClassGeneral Purpose Amplifier Triode
BaseOctal
Filament12.6 V @ 150 mA
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialIntermediate shell octal
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.5 W
Cathode Current20 mA
H-C Voltage90 V
Audio Performance
Key Features
- Cathode type
- High mutual conductance
- Low output capacitance
- Suited for high frequency oscillator service
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 250 V | 2600 | 7700 | 20 | 9 mA |
| Class A1 Amplifier | 90 V | 3000 | 6700 | 20 | 10 mA |
Application Notes
Identical to type 6J5GT except for heater requirements. Suited for resistance coupled amplifiers or super-heterodyne circuits as an oscillator.
Datasheets
Datasheet: 12J5GT.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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