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Tube Database (7,341 tube types · 1,270 archive entries)

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Tube-number record

12AX7A

56 archive entries

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

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operation 1100 V—800001000.5 mA
Typical Operation 2250 V1600625001001.2 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 PDF
Loading datasheet...

Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

Filters

56 tubes found

Manufacturers

Matsushita4Mullard4
Telefunken
4
Philips3
Amperex2
RCA2
Ei1
Hitachi1
Marconi1
Raytheon1
Sylvania1

Brands

Belvu4Mazda4RCA4Amperex2Bell & Howell2CEI2Fender2Lafayette2Magnavox2National2Raytheon2Sylvania2Tung-Sol2Voice Of Music2Amc1Ami1Baldwin1Cge1Cmi1Eico1Electronics For Medicine1Ge1Hammond1Hewlett Packard1Hit-Ray1Hitachi1Itt1Lowrey1Ltt1Marconi1Mullard1Philips1Philips Ecg1Pro/Comm1Raytheon Uniline1Realistic1Rowe1Sears1Silvertone1United Electron1Westinghouse1

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Showing 1–24 of 56 results
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Maker
Ei
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12AX7A, 7025A

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