PSVANE 2A3-TII 하이 엔드 진공관 클래식 그레이드 베스트 매치 페어 2A3-T Mark II 전자 밸브

The price is for a pair of 2A3-TII hi-end vacuum tube (2 pcs). 
The 2A3-TII direct heating cathode power double triode is used for A1 and AB1 class amplification.

All items guaranteed 100% BRAND NEW in the original edition Box. 
ONE-YEAR WARRANTY !!! 

Filament heating 
Uf .............................. 2.5 V 
If .............................. 2.5 A 
Static parameters 
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 
Limit rating 
Anode voltage .............................. 300 V 
.............................. 15 W anode dissipation power 
Gate resistance 
Self-bias .............................. 0.5 MΩ 
Fixed bias .............................. 0.05 MΩ 
Electrode capacitance 
Input capacitance .............................. 7.5 PF 
Output capacitor .............................. 16.5 PF 
The cross road capacitance .............................. 5.5 PF 

Recommended work status (reference value) 
Class A1 amplifier (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% 

Driving AB1 amplify 
Fixed bias self-bias 
Ua ............... 300 300 V 
-Ug .............. 62 Rk = 780Ω V 
RL ............... 3 5kΩ 
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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