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Tube-number record
12AD7
6 archive entries
12AD7 is a tube type in the TubeDatabase archive (class: High Mu Double Triode). Recorded specifications: brand Sylvania, construction Dual triode, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1 W. The archive holds 6 photographed examples of this type.
BrandSylvania
ClassHigh Mu Double Triode
BaseNoval (B9A)
Filament12.6 V @ 225 mA
Construction
Primary TypeDual triode
EnvelopeMiniature
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesHeater sections can be operated in series (12.6V) or parallel (6.3V).
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250 V | 1600 | 62500 | 100 | 1.25 mA |
Application Notes
Rigorously controlled to provide hum and microphonic free operation in low level audio preamplifier service.
Datasheets
Datasheet: 12AD7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
