Sound characteristics: The sound base is warm and sweet, loose and natural, with high balance, a peaceful background, rich details, and a more prominent analog flavor compared to ordinary electronic tubes. The separation of vocals and instruments is high, and the overall sound has a texture of vinyl. Process characteristics: 1. A ceramic base plate with a unique patented process that does not absorb moisture, has high voltage resistance, and extremely high insulation, ensuring highly stable quality; 2. The black carbon crystal coating with unique craftsmanship is well made and easier to absorb vacuum escaping electrons; 3. Adopting metal tube base, beautiful and elegant, and advanced hardware processing technology; 4. Adopt genuine gold plated tube needles to ensure welding and contact performance; 5. Long term aging stability ensures excellent electrical performance of the product; 6. Professional level electronic tube testing instruments implement high-precision and precise pairing and grouping; Hot wire heating Uh……………………………............................6.3 V Ih……………………………..............................1.5 A Ultimate rated value Anode voltage ...................800 V Second gate voltage ...................500 V First gate voltage ...................-100 V Anode dissipated power ....................25 W The second gate dissipates power .....................8 W Cathodic current ...................150 mA First gate resistance During self bias voltage ...................0.7 MΩ When the bias voltage is fixed ................0.5 MΩ Voltage between hot wire cathodes ...............±100 V Glass shell temperature ....................250 ℃ Hot wire heating Interelectrode capacitance Input capacitance ....................15.2 PF Output capacitance .....................8.4 PF Cross circuit capacitor .....................1.1 PF The capacitance between the first grid hot wire is ..................1.0 PF Hot wire cathode capacitance ....................10 PF Static parameters Ua……………………………............................250 V Ug2…………………………….........................250 V Ug3……………………………...........................0 V Ug1…………………………...........................-12.2 V Ia……………………………............................100 mA Gm……………………………..........................11 mA/V ri……………………………..............................15 kΩ μg1-g2……………………….........................11

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