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12AZ7

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BrandTUNG-SOL
ClassDouble Triode
Base9-pin miniature
Filament6.3V @ 450mA

Construction

Primary TypeDouble Triode
EnvelopeGlass
Sections2

Filament / Heater

Heater NotesSeries or Parallel operation; AC or DC

Absolute Maximum Ratings

Plate Voltage300 V
Plate Dissipation2.5 W
Grid 1 Voltage-50 V
H-C Voltage200 V

Audio Performance

Key Features
  • Coated Unipotential Cathode
  • Independent Medium-Mu Triodes
  • Adaptable as AF Amplifier, Oscillator, or Mixer

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier (Condition 1)100V400015000603.7mA
Class A Amplifier (Condition 2)250V5500109006010mA

Application Notes

For 12.6 volt operation apply heater voltage between pins #4 and #5. For 6.3 volt operation apply heater voltage between pin #9 and pins #4 and #5 connected together.

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