M8080, ZAERIX SPECIAL QUALITY 6C4, BOXED NOS, CV133, CV852, EC90, L77, V741,
M8080, ZAERIX SPECIAL QUALITY 6C4, BOXED NOS, CV133, CV852, EC90, L77, V741, M8080 valves are used in the Conrad Johnson PV-14 and PV-15 series, as well as the ET2 all use this tube. They are also a suitable upgrade for any 6C4 circuit such as vintage Eico tuners, McIntosh receivers,