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Stereo Vacuum Tubes Tested HiFi 2A3B 2A3 Psvane Vacuum Tube For Tube Amp
2A3 is a direct-heated cathode power double triode, it is used in classA1, AB1 amplifier.
Direct Interelectrode Capacitances input………………………… 7.5 PF
output…………………………16.5 PF
grid to plate…………………………5.5 PF
Static parameter
Ua………………………… 300 V
-Ug………………………… 45 V
Ia………………………… 60 mA
Gm………………………… 5.25 mA/V
ri………………………… 0.8 kΩ
μ………………………… 4.2
Pout…………………………3.5 W
Heater
Uf ………………………… 2.5 V
If…………………………2.5 A
Maximum Rating
Ua…………………………300 V
Pa…………………………15 W
Rg
with cathode bias…………………………0.5 MΩ
with fixed bias…………………………0.05 M
Recommended Operating Conditions(reference value)
class A1.single tube.fixed bias.
Ua………………… 250 V
-Ug……………………45 V
RL……………………2.5 kΩ
Ia(0)…………………60 mA
Gm……………………5.25 Ma/V
ri……………………0.8 Kω
μ……………………4.2
Pout……………………3.5 W
Dtot……………………5 %
Push-full.class AB1.
fixed bias cathode bias
Ua……………300 300 V
-Ug……………62 Rk=780Ω V
RL……………3 5 kΩ
üg(pk)………87 110 V
Ia(0)…………80 80 mA
Ia(max.sig)…140 100 mA
Pout……………15 10 W
Dtot……………2.5 5 %