WE845 Tube 1:1 Copy WE 845 Upgrade 845T 845TA HiFi Audio Tube Amplifier DIY with Four Channels(2pcs Matched Pair)

Preamps
WE845 directly heated tungsten transistor can be used for A1Ab1 power amplification.
Filament Heating
Voltage input-------------------10V
Intermediate frequency-------------------3.25A
Extreme Rating
Anode voltage: 1250V
Anode dissipation power: 75W
Output power at maximum signal: - 150W
Maximum anode current: -120 mA
Interelectrode capacitance
Input capacitance--------------6PF
Output capacitance: 4.5PF
Inter-circuit capacitance ----------- 14.5PF
Recommended working state (reference value) single tube A1 class amplification
Voltage source ------------1000 1000 1250V
-Ua------------145 155 209V
RL-------------6 9 16K
Isaac --------------90 65 52MA
Gm------------3.1 - -mA/V
ug (peak)-------110 148V
Day--------------1.7 1.9 2.1 K
Pout-----------24 21 24W
Push-pull AB1 amplification;
Voltage source ------------800 1000 1000 1250V
-Ua----------------125 170 175 225 volts
RL-------------4.5 4.6 4.6 6.6K
Ia--------------80 70 40 40MA
Peak voltage------177 240V
Ia(mA×.sig)--170 230 230 240mA
Output------------40 75 75 115W
Static parameters
Uf--------10v
Voltage-------1250V
Uh---200
Voltage-------3MA/V
r----------1.7K
Uh----------5
Remaining---------3.4K
ug(peak)----69V
Output power-----15W