(SINGLE) 6ES8=ECC189 Mullard UK branded Zenith NOS 1965 (14/16ma)

1 tube) 6ES8=ECC189 Mullard UK NOS branded Zenith 1965 1 section) 14ma Gm=11,500 1 section) 16ma Gm=12,600 Good Ma = 12-15ma Good Gm = 12,000 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"