CV181-TII is double triode, used in voltage amplification circuit, Can be replaced directly by 6N8P and 6SN7GT. Heater UH: 6.3V IH: 0.6A Static Parameter Ua: 90 250 V Ug: 0 -8V Ia: 10 9 mA Gm: 3 2.6 mA/V Ri: 6.7 7.7 kΩ μ : 20 20 Ia: when Ug=-12.5V 1.3mA Ug: whenIa=-10uA - 7 -18V Maximum Rating class A1 Ua: 450V Ik: -20mA Pa: 5w Pa(No.1+No2): 7w Rg: 1MΩ Uhk: ±100V

Notice: the price is just for one tube,if you want to matched pair, please buy two tubes Some precautions about using high voltage power tubes:  Unlike other vacuum tubes such as KT88 or EL34, which typically run at 450V plate voltage, high voltage power tubes such as 845, 805 and 211 run at plate voltage 900V or even higher depending on your amp design. Due to the high voltage in the circuit, biasing an 845 / 805 or 211 amp improperly may expose you to lethal high voltage causing instant...

Description：  The Psvane T-series black bottle tubes are a further development over the highly sought after Shuguang Treasure Z-series, which was originally first launched by Grant Fidelity in Jan 2009 in North America as Shuguang’s first take on high end vacuum tubes.  The elite team of engineers who contributed to the Treasure Z-series have done further fine tuning of the Z-series in the past few years. The further development has created a new series called Psvane T-series...

WE211 is direct-heated type thorium tungsten cathode triode, can be used as class A, B and C. Heater Uf: 10 V If: 3.25 A Direct Interelectrode Capacitances input: 6 PF output: 5.5 PF grid to plate: 14.5 PF Static parameter Ua: 1250 V —Ug: 70 V Ia: 100 mA Gm: 3.8 mA/V u(Ia=75mA): 12 RL: 7 KΩ Pout: 10 W

Some precautions about using high voltage power tubes:  Unlike other vacuum tubes such as KT88 or EL34, which typically run at 450V plate voltage, high voltage power tubes such as 845, 805 and 211 run at plate voltage 900V or even higher depending on your amp design. Due to the high voltage in the circuit, biasing an 845 / 805 or 211 amp improperly may expose you to lethal high voltage causing instant death. If you haven’t owned any tube before, we recommend you not to start with a...

Specification:  2.2 Electrical parameters ---- Rating rating unit  2.2.1 Capacitance between electrodes  2.2.1.1 Input Capacitance 15.5 PF  2.2.1.2 Output Capacitance 8.4 PF  2.2.1.3 Cross-circuit capacitance ≤ 1.5 PF  2.2.2 Typical operating parameters  2.2.2.1 Hot wire voltage 10 V  2.2.2.2 Hot wire current 0.36 A  2.2.2.3 Anode voltage 135 V  2.2.2.4 Curved gate voltage 135 V  2.2.2.5 Control gate voltage -3 V  2.2.2.6...

PSVANE TUBE WR50 is direct-heated type thorium tungsten cathode triode, can be used as class A1 and AB1 amplification.  Typical operating parameter  Heater voltage 7.5 V  Heater current 1.25A  Ua 350V  Grid voltage -63 V  Ia 45 Ma  Internal resistance 4.1K  Amplification coefficient 3.8  Output power 2.4W 

UK-EL34 is a high-performance audio output pentode, its anode limited dissipation power is 25W. The output power is more than 10W when it is for Class A1 amplification as a single tube in audio amplifier.The output power more than 35W when it is for Class AB1 amplification.  

Classification-Dome-type or Aubergine-type bulb of glass, a white ceramic base with four-prong bayonet gold pins , oxide coated filamentary, solid plate, mesh plate, cabon plate triode.  Application-Audio frequency amplifier where power outputs of approximately 8.5watts or less is required at relatively low plate voltages.  Dimensions-Dimensions, outline diagrams of the tube and bases, and the arrangement of electrode connections to the base terminals are shown in Figures 1, 2 and...