ECC81 is 12AT7 medium gain pre-amplifying double triode. Can be also used as replacement for 12AX7 in many applications. Very smooth and warm sound. Very low microphonic. Good for phase inverters or reverb drivers.
Base: NOVAL
Uf = 6,3 or 12,6 V
If = 300 or 150 mA
Typical characteristic:
Ua = 250 V
Ia = 10 mA
Ug = -2 V
S = 5,5 mA/V
μ = 60
Ri = 11 kΩ
