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Psvane 2A3-T MKII Classic grade

Chinese Psvane 2A3-T MKII Classic Grade.
The grey glass is a upgrade of black glass treasure series. It is also divided into two classic grade and premium grade same as treasure series tubes.
2A3 is a direct-heated cathode power double triode, it is used in classA1, AB1 amplifier.

Psvane 2A3-T MKII Classic grade
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Psvane 2A3-T MKII Classic grade

Psvane 2A3-T MKII Classic grade

Psvane 2A3-T MKII Classic grade

2A3-TII is a direct-heated cathode power double triode, it is used in classA1, AB1 amplifier.

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 MΩ
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

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 %

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