12AX7A
- Maker
- Amperex
- Brand
- Hewlett Packard, Amperex
Tube-number record
12AX7A
56 archive entries
12AX7A is a tube type in the TubeDatabase archive (class: Double Triode). Recorded specifications: brand Mazda Belvu, construction Triode, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1 W. The archive holds 56 photographed examples of this type.
BrandMazda Belvu
ClassDouble Triode
BaseNoval (B9A)
Filament12.6 V @ 150 mA
Construction
Primary TypeTriode
EnvelopeA22-2
Base MaterialGlass
SectionsDouble
Filament / Heater
Heater NotesAlimentation du filament en série (12,6V) ou en parallèle (6,3V)
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1 W
Grid 1 Voltage-50 V
Cathode Current8 mA
H-C Voltage180 V
Audio Performance
Typical THD5%
Key Features
- Cathodes séparées
- Préamplificateur A.F.
- Montage quelconque
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation 1 | 100 V | — | 80000 | 100 | 0.5 mA |
| Typical Operation 2 | 250 V | 1600 | 62500 | 100 | 1.2 mA |
Application Notes
Commonly used in AF preamplifiers and phase inverters. Class A amplifier conditions provided for anode voltages between 90V and 300V.
Datasheets
Datasheet: 12AX7A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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7025, 12AX7A, ECC83
- Maker
- Matsushita
- Brand
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12AX7A, ECC83
- Maker
- Matsushita
- Brand
- CEI
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12AX7A, ECC83
- Maker
- Matsushita
- Brand
- Philips
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12AX7A, I61
- Maker
- Mullard
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12AX7A
- Maker
- Mullard
- Brand
- Voice Of Music
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12AX7A, ECC83
- Maker
- Telefunken
- Brand
- Belvu
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12AX7A
- Maker
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12AX7A, ECC83
- Maker
- Telefunken
- Brand
- Mazda
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Showing 1–24 of 56 results