WE845 tube 1:1 copy WE 845 upgrade 845T 845TA HIFI audio tube amplifier DIY with four channels(2pcs Matched Pair)

PreampsWE845 directly heated tungsten transistor can be used for A1Ab1 power amplification.Filament HeatingVoltage input-------------------10VIntermediate frequency-------------------3.25AExtreme RatingAnode voltage: 1250VAnode dissipation power: 75WOutput power at maximum signal: - 150WMaximum anode current: -120 mAInterelectrode capacitanceInput capacitance--------------6PFOutput capacitance: 4.5PFInter-circuit capacitance ----------- 14.5PFRecommended working state (reference value) single tube A1 class amplificationVoltage source ------------1000 1000 1250V-Ua------------145 155 209VRL-------------6 9 16KIsaac --------------90 65 52MAGm------------3.1 - -mA/Vug (peak)-------110 148VDay--------------1.7 1.9 2.1 KPout-----------24 21 24WPush-pull AB1 amplification;Voltage source ------------800 1000 1000 1250V-Ua----------------125 170 175 225 voltsRL-------------4.5 4.6 4.6 6.6KIa--------------80 70 40 40MAPeak voltage------177 240VIa(mA×.sig)--170 230 230 240mAOutput------------40 75 75 115WStatic parametersUf--------10vVoltage-------1250VUh---200Voltage-------3MA/Vr----------1.7KUh----------5Remaining---------3.4Kug(peak)----69VOutput power-----15W

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