2A3 Tube 2A3-TII 2A3C 2A3B HiFi Audio Tube Amplifier DIY(1Pair Matched)

Preamps
2A3-TII direct-heated cathode medium-power dual triode, used for A1 and AB1 amplification.
Filament Heating
2.5V voltage
If 2.5 A
Static parameters
UA300V
-Ug45V
Current 60 mA
On-resistance 5.25 mA/V
0.8 thousand
Four point two
Water output 3.5W
Extreme Rating
Anode voltage..................................300V
Anode power dissipation..................................................15 W
Grid resistance
In case of self-bias................................0.5 M
When bias voltage is fixed................................0.05 M
Interelectrode capacitance
Input capacitance ................................. 7.5 pF
Output Capacitance ................................................. 16.5 pF
Inter-circuit capacitance................................................5.5 PF