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  Special Vacuum tube
KT90 Vacuum tube
Parameter:
Ua: 250 V
Ug2: 250 V
Ia: 140 mA
Ia2(approx): 3 mA
-Ug1(approx): 15 V
Gm: 12 mA/V
ri: 12
μg1-g2: 8  



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