Preamps
WE2A3 direct-heated cathode medium-power triode is used for A1 Ab1 amplification.
Filament Heating
Uf----------------2.5V
Medium frequency-------------2.5A
Static parameters
Voltage----300V
-ug--45V
Current value---- -----60 mA
Gm----------5.25 mA/V
Li---0.8k
Uh----------4.2
Output-------------3.5W
Extreme Rating
Anode voltage --- 300V
Anode dissipation power: 15W
Grid resistance
Self-bias period ------ 0.5m
Fixed bias voltage --- 0.05m
Interelectrode capacitance
Input capacitance: -7.5PF
Output capacitor --- 16.5PF
Inter-circuit capacitance --- 5.5PF
Recommended working status (reference value)
Single tube class A1 amplifier (fixed bias)
Voltage------------------250V
-Voltage-------------45V
Remaining--------------2.5k
Current----------------60 mA
Gm--------------5.25Ma/V
ri-----------------0.8k
u-----------------4.2
Output--------------3.5W
Total---------------5%