845 tube 845-TII collector's edition amplifier DIY package(2pcs Matched Pair)

Preamps845-TII is a directly heated thoriated tungsten cathode triode, class A1 and AB1HeaterUf------------------10VIf ------------------- 3.25 AMaximum RatingsUa----------------1250VPa--------------75WOutput power (maximum signal)-------------150 WIa(max)------------------120mA;Direct interelectrode capacitanceInput---------------6 PFOutput---------------4.5 PFGrid to plate-------------14.5 PFStatic parametersVoltage-------------------1250V-Ug----------------200VIa---------------------80 mATransconductance------------------3 mA/Vri--------------------1.7 KUh----------5RL---------------------3.4 KUg(pk)--------------------69 VOutput-----------15 WRecommended operating conditions (reference values)A1 level. Single tube:Voltage source ———— 1000 1000 1250 volts-Ug--- 145 155 209 VRL-----6 9 16 KCurrent------90 65 52 mATransconductance -----3.1 - - mA/VPeak voltage --- 110 148 VMileage------1.7 1.9 2.1 KPout----24 21 24 WPush-pull type. Class AB1:Ua----------------- 800 1000 1000 1250 V-Ug---------------- 125 170 175 225 voltsRL------------------ 4.5 4.6 4.6 6.6 KIa--------------------------------80 70 40 40 mAUg(pk)----------------177 240 - - VIa(mAx.sig)---------170 230 230 240 mAPout----------------40 75 75 115 WChannels: 1Model: 845-TII Collector's EditionMaximum power per channel: No power supply

• Preamps