The JJ Electronic ECC99 is a noval based dual triode. This tube features a rugged construction and is also available with gold pins. The ECC99 is typically used as a driver for power triodes in 2A3 and 300B amplifiers but can also be used as a power tube in small amps and headphone amps. This tube can also be a functional replacement for 5687, E182CC, 6840, and 6BL7 tubes. Note: Sockets on some of these types could have a different set-up.
| Body Height | 68.4 mm | |
| Cathode Current (Ik) | ≤ 60 mA | |
| Filament Current (If) | 800 / 400 mA | |
| Filament Voltage (Uf) | 6.3 / 12.6 V | |
| Gain (μ) | 22 | |
| Grid Voltage (Ug) | -4 V typical | |
| Grid capacitance (cg1) | 5.8 pF | |
| Grid to Plate Capacitance (ca/g) | 5.1 pF | |
| Heater to cathode voltage (Uk/f) | ≤ 200 V | |
| Internal Resistance (Ri) | 2.3 kΩ | |
| Item Diameter | 22 mm | |
| Item Height | 62.2 mm | |
| Plate Capacitance (ca) | 0.91 pF | |
| Plate Current (Ia) | 18 mA | |
| Plate Dissipation (Wa) | ≤ 3.5 W | |
| Plate Voltage (Ua) | ≤ 400 V, 150 V typical | |
| Transconductance (S) | 9.5 mA/V |
