ECC83 / 12AX7 / CV492 double triode
 |
This valve measures 55x20mm overall and has a B9A base. |
See also CV4004 and the fly lead version CV4035 which are based on this valve.
| Heater voltage | 12.6V / 6.3V |
| Heater current | 0.15 / 0.3A |
| Anode voltage | 250V |
| Grid voltage | -2V |
| Anode current | 1.2mA |
| Mutual conductance | 1.6mA/V |
| Ampification factor | 100 |
| Max anode dissipation | 1W |
| Capacitances | |
| Cag1 | 1.7pF |
| Cin | 1.6pF |
| Cout | 0.4pF |
| Pin | Function |
| 1 | Anode 1 |
| 2 | Grid 1 |
| 3 | Cathode 1 |
| 4 | Heater |
| 5 | Heater |
| 6 | Anode 2 |
| 7 | Grid 2 |
| 8 | Cathode 2 |
| 9 | Heater centre tap |
Variations in design: from left to right, Mullard British made, Mazda marked Foreign, imported Mullard, Brimar (12AX7 marked) made in England, and Pinnacle ECC83/12AX7 marked.