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