(!!!!) (Single) ECC189=6ES8 Amperex Holland NOS 1972 (10.5/13.5ma)

1 tube) ECC189=6ES8 Amperex Holland NOS 1972 10.5ma Gm=11,500 13.5ma Gm=13,000 Tested on Amplitrex Good Ma = 12ma Good Gm = 11,000-12,000 - 6ES8 is similar to 6DJ8 6ES8 has electrical ratings very similar to a 6DJ8=ECC88, 6ES8 have high Gm, low internal capacitances and low noise) (6ES8 were originally designed for used as cascode VHF amplifiers) (Vplate max=130V, Iplate max=22ma, Plate Dissipation max= 1.8watts) (Typical Operation Class A Amp: Vplate=90V, Vgrid=-1.2V, Iplate=15ma, Gm=12500) "Thank you, I received the Telefunken ECC189 tubes today. Well packaged, and beautiful sounding valves. Many Thanks, John"