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R.F. DOUBLE TRIODEE88CC is the European Name of 6922/6DJ8. It is often used for Hi-Fi applications. It provides very smooth mids and high end with a lot of detail. Specifications B ase: NOVAL Heater Voltage (Uf): 6.3 V Heater Current (If): 300 mA Typical Characteristics: Anode Voltage (Ua): 90 V Control Grid Voltage (Ug): -1.3 V Anode Current (Ia): 15 mA Transconductance (S): 12.5 mA/V Internal Resistance (Ri): 2.6 kΩ Amplification Factor (µ): 33 Capacitances: System I: Grid to Cathode Capacitance (cg/k): 3.1 pF Anode Capacitance (ca): 0.18 pF Grid to Anode Capacitance (cg/a): 1.4 pF System II: Grid to Cathode Capacitance (cg/k): 3.1 pF Anode Capacitance (ca): 0.18 pF Grid to Anode Capacitance (cg/a): 1.4 pF Limiting Values: Maximum Anode Voltage (Ua0): 550 V Maximum Anode Voltage (Ua) at Ia = 0: 400 V Maximum Anode Voltage (Ua): 220 V Maximum Anode Voltage (Ua) with Power Dissipation < 0.8 W: 250 V Maximum Anode Dissipation (WaR): 1.5 W Maximum Grid Dissipation (Wg1R): 0.03 W Maximum Cathode Current (Ik): 20 mA Maximum Control Grid Voltage (Ug): -100 V Grid Resistor (Rg): 1 MΩ Maximum Cathode to Heater Voltage (U+k/f-): 120 V Maximum Cathode to Heater Voltage (U-k/f+): 60 V Cathode to Heater Resistance (Rk/f): 20 kΩ Show more