Vacuum Tube 6550 Replaces KT88 KT66 KT77 KT120 KT150 KT100 EL34 HiFi Audio Tube Amplifier DIY Supporting Four-Way(1 pcs)

Preamplifiers6550: Beam power quadrupole 6550 is similar to KT88 and can be used interchangeably.Hot wire heatingUltra high 6.3 voltsIshi 1.6 AStatic parametersTetrode connection methodVoltage 250VVoltage Ug2 250V140 mARated current 12mAOn resistance 11mA/V12KReplay......1.5KOutput power 12.5WTotal 7 %Recommended working status (reference value)Single tube A1 amplifierUA(B)......400VUg2 225V-Ug1......16.5VI A (O) ...... 87 mAIa (maximum signal)......105 mAIg2 (0)......4 mAIg2 (maximum signal)......18mAGeneral Manager 9Ri...... 27 k20WTotal 13.5%Push-pull Class A1 amplifierFixed bias voltage Self bias voltageVoltage source (b) 400 600 400VUg2275 300 300V-Ug23v31v RK=140 /Rotary kiln No. 3.554.5Ia(o)2×902×582×83 mAIa (maximum signal) 2×135 2×1362×95mAIg2(0) 2×4.52×22×3.6 mAIg2 (maximum signal) 2×222×20.52×19.5mAOutput power 55 100 41 wattsTotal 32.5 4 %Push AB1 class amplification, transistor connectionSelf-bias voltage Fixed bias voltageUa.g2(b) 400 400 V-Ug 40v RK=525 /RL (amino acid) 4 4 K~U(g1-g1.pk) 7878 VIa+g2(0)2×76 2×76 mAIg+Ig2 (max.sig) 2×80 2×80 mAPout 1717 WTotal net profit 1.5 1.5 %Push-pull AB1 class amplifier (self-biased)Voltage Ua(b)400VUg2 310VINR 140RL 5 thousand~u(g1-g1.pk)43VIa(o)2X 85mAIa (maximum signal) 2X92.5 mAIg2(0) 2X5 mAIg2 (maximum signal) 2X12.5mAPout40 WTotal 0.7%Push-pull AB1 class amplifier (fixed bias)Voltage source (b) 400 450 600 VUg2270 310 300V-Ug23 29.532.5VRotary kiln No. 3.53.55~u(g1-g1.pk)46 58 65 VCurrent value (a) 2×852×752×50mAIa (maximum signal) 2×137.5 2×1472×135mAIg2(0) 2×4.52×22×2.5 mAIg2 (maximum signal) 2×17.52×192×16.5mAPout6070 1001WTotal 0.61.53%

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