300B-L 300BL vacuum tube HIFI audio tube amplifier DIY(2pcs Matched Pair)

PreampsIt is a direct-heated cathode medium-power triode for class A1 amplification. In audio amplifiers, it is suitable for 10W output power.Extreme RatingAnode voltage: 480VAnode dissipation power............ 40WCathode currentSelf bias ................................. 100 mAFixed bias voltage 70 mAInterelectrode capacitanceInput capacitance................................9pFOutput capacitance................................4.3PFInter-circuit capacitance................................15PFStatic parametersUa............................300V-Ug......................60VCurrent value...............60 mATransconductance................................5.5 mA/VRi........................0.7 K................................ 3.85Pout..............................6.6WRecommended parametersUggUa Uf (AC) Uf (DC) I aVoltage --~ Voltage----Voltage---- mA200--33--29.5--77200--45--41.5--20250--46--42.6--74250--57--53.6--22300--60--56.5--68300--70--66.5--23400--86--82.5--68400--98--94.5--19Limit Parameters450--100--96.5--60Model: 300BLMaximum power per channel: No power supplyOrigin: Mainland ChinaCertification: CEProduct Type: Vacuum tube, electron tubeReplaces: 300B 4300B 300BT 7300B 300BG 300BCApplication: tube amplifier, HIFI amplifier, DIY audio amplifier accessories

• Preamps