NOS combination tube (Pentode/Triode) made by Mullard (high quality, gold pins), can be used headphone amps or Hifi applications in general..
Similar to: ECF80
Pinout: 1=A(T), 2=g1(P), 3=g2(P), 4=H, 5=H, 6=A(P), 7=g3/K(P), 8=K(T), 9=g(T)
Heizung 6,3V/0,33A, Pentode: Ua=170V, Ug2=170V, Rk=155Ohm, Ia=10mA, Ig2=2,7mA, S=6,2mA/V, mu=40, Ri=0,4MOhm, Triode: Ua=-100V, Rk=120Ohm, Ia=14mA, S=5mA/V, mu=18
Pentode: Ua=275V, Pa=2,15W, Ug2=200V, Pg2=0,7W, Pg1=0,1W, Ik=18mA, Ukh=100V, Triode: Ua=-275V, Pa=1,75W, Pg=0,1W, Ik=18mA, Ukh=100V, Rg=0,5MOhm