JJ Electronic ECC81 / 12AT7 Preamp Vacuum Tube
ECC81 is 12AT7 medium gain pre-amplifying double triode. Can be also used as replacement for 12AX7 in many applications. Very smooth and warm sound. Very low microphonic. Good for phase inverters or reverb drivers.
Specifications:
| Body Height | 49.2 mm |
| Cathode Current (Ik) | ≤ 15 mA |
| Filament Current (If) | 300 / 150 mA |
| Filament Voltage (Uf) | 6.3 / 12.6 V |
| Gain (μ) | 60 |
| Grid Circuit Resistance (Rg) | 1 MΩ |
| Grid Voltage (Ug) | ≥ -50 V, -2 V typical |
| Heater to cathode voltage (Uk/f) | ≤ 90 V |
| Internal Resistance (Ri) | 11 kΩ |
| Item Diameter | 22 mm |
| Item Height | 56.3 mm |
| Plate Current (Ia) | 10 mA |
| Plate Dissipation (Wa) | ≤ 2.5 W |
| Plate Voltage (Ua) | ≤ 300 V, 250 V typical |
| Transconductance (S) | 5.5 mA/V |
6 Month Warranty