2026 NEW Shuguang Tube 12AU7(ECC82)Amplifier HIFI Audio Vacuum Tubes

Heating by a hot wire

Uh…………………………………………….. 6.3 (in parallel)   12.6 (in series)   V

Ih………………………………………………. 0.30   0.15   A

Maximum values for Class A amplification (per side)

Anode voltage……………………………………………. 300   V

Negative anode voltage………………………………………… -50   V

Maximum cathode current …………………………………… 20   mA

Anode power dissipation……………………………………. 2.75   W

Voltage between the hot wire and the cathode (pk)………………………. ±200   V

Gate resistance

Self-bias voltage………………………………………… 1   MΩ

Fixed voltage……………………………………. 0.25   MΩ

Inter-electrode capacitance

No.1     No.2

Input capacitance…………………………………………. 1.6   1.6   PF

Output capacitance…………………………………………. 0.4   0.32   PF

Coupling capacitance…………………………………………. 1.5   1.5   PF

Electrostatic parameters

Ua ………………………………………………….. 100   250   V

Ug …………………………………………………… 0   -8.5   V

Ia  …………………………………………………. 11.8   10.5   mA

Gm …………………………………………………. 3.1   2.2   mA/V

μ……………………………………………………. 20   17

ri ……………………………………………………. 80   62.5   KΩ

ri (approximate) ……………………………………….. 6.5   7.7   KΩ

Ug (approximate) ……………………………………… -11.8   -10.5   V

(When Ia = 10 μA)