The JJ Electronic 5751 is a dual triode that can be used in place of most 12AX7 circuits. The rugged build of this tube and reduced gain (30% less than a 12AX7) can improve headroom and give better control in high gain stages allowing users to more easily dial in sweet spots. The JJ 5751 features a smooth and balanced tone and a detailed response with low noise and low microphonics.
| Body Height | 49.2 mm | |
| Filament Current (If) | 350 / 175 mA | |
| Filament Voltage (Uf) | 6.3 / 12.6 V | |
| Gain (μ) | 70 | |
| Grid Voltage (Ug) | ≥ -50 V, -1 V typical | |
| Grid capacitance (cg1) | 1.6 pF | |
| Grid to Plate Capacitance (ca/g) | 1.7 pF | |
| Internal Resistance (Ri) | 58 kΩ | |
| Item Diameter | 22 mm | |
| Item Height | 56.3 mm | |
| Plate Capacitance (ca) | 0.33 pF | |
| Plate Current (Ia) | 0.8 mA | |
| Plate Dissipation (Wa) | ≤ 1 W | |
| Plate Voltage (Ua) | ≤ 300 V, 100 V typical | |
| Transconductance (S) | 1.2 mA/V |
