Tube-number record
ECC83/12AX7
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BrandEi-RC
ClassA.F. Double Triode
BaseNoval (B9A)
Filament6.3 V @ 300 mA
Construction
Primary TypeDual triode
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesSerial or parallel supply, pins 9-(4+5) for 6.3V or 4-5 for 12.6V
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1 W
Grid 1 Voltage-50 V
Cathode Current8 mA
H-C Voltage180 V
Audio Performance
Power Output0.05 W
Key Features
- Low microphony
- Serial or parallel heating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical characteristics | 100 V | 1250 | 80000 | 100 | 0.5 mA |
| Typical characteristics | 250 V | 1600 | 62500 | 100 | 1.2 mA |
Application Notes
Can be used without precautions against microphony in equipment characterized by Vi >= 10mV for 50mW output, or Vi >= 100mV for 5W output.
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