WE 300B vacuum tube precision matching amplifier(2 pcs)

PreampsWE300BFilament HeatingUf (DC)....5VIf (DC)...............1.2AStatic parametersVoltage input.................300 V-Ug.................60VIa........................60mATransconductance................................5.5 mA/Vri........................0.7 KYou.....................3.85Pout....................6.6WRestrict RatingAnode voltage...............480VAnode power dissipation.........40WCathode currentSelf bias.................100 mAFixed bias voltage..................70mAInterelectrode capacitanceInput capacitance................9PFOutput capacitance................4.3PFInter-circuit capacitance..................15PFTypical operating parametersAudio AmplifierClass A1 Amplification:Ua -Ug Ia RL Pout SecondVoltage Current mA Watts dB200 42 30 2000 3 20200 39 40 2500 2.6 26250 55 30 2000 4.9 18250 52 40 3000 4.0 26250 50 50 2500 4.4 26250 48 60 2000 4.7 26250 48 60 2700 4.1 30250 45 80 1500 5.0 26300 65 40 2500 6.7 20300 63 50 2000 7.2 21300 63 50 3000 6.1 26300 61 60 2400 6.6 26300 58 80 1700 7.5 26350 76 50 3600 7.8 26350 74 60 2000 10.2 21350 74 60 3000 8.3 26350 74 60 4000 7.0 30350 71 80 2200 9.6 26400 91 40 5000 8.4 26400 89 50 1000 11.5 21400 89 50 4000 9.4 25400 87 60 3500 10.5 26400 84 80 2500 12.5 25450 104 40 6000 9.5 2645010250500010.7

• Preamps