Psvane Mark ⅡSeries Stereo Vacuum Tubes 12AU7-TⅡ B9A Double Triodes Base

Psvane Mark Ⅱ Series 12AU7 -TⅡ B9A Double triodes base hi-fi audio vacuum tube 12AU7 ECC82

12AU7-TII is double triode small size novel tube, it is used as inverter drive push-pull amplifier in amplifying circuit.

Heater
Uf-----------------6.3V 12.6 V
If-------------------0.30 0.15 A
Direct Interelectrode Capacitances
No.1 No.2
input---------- 1.6 1.6 PF
output---------- 0.4 0.32 PF
grid to plate----------1.5 1.5 PF
Static parameter
Ua--------------100 250 V
—Ug-------------0 8.5 V
Ia---------------11.8 10.5 mA
Gm--------------3.1 2.2 mA/V
u--------------- 20 17
ri(approx)---------6.5 7.7 KΩ
Ug(approx)--------—11.8 —10.5 V
(when Ia=10uA)
class A1.maximum.single triode.
Ua----------------300 V
Pa-------------2.75 W
Ik(max)-------------20 mA
Ug----------------—50 V
Uh-k(pk)--------±200 V
Rg
with cathode bias----------------1 MΩ
with fixed bias-------------- 0.25 MΩ