(!!!!) (Best Pair) 6U8A GE NOS 1971 (16.6/17ma and 11.8/11.2ma)
(!!!!) (Best Pair) 6U8A Philips by Sylvania NOS 1986 (17.3/17.6ma and 9.5/9ma)
(!!!!) (Best Single) ECF82=6U8 Telefunken <> bottom NOS 1962 (14.5ma triode and 8.6ma pentode)
(!!!!) (Best Single) GB-1252=6U8A Sylvania Gold Brand NOS 1970 (Premium 6U8A) (18.6/10.2ma)
(!!!) (Best Raytheon Single) 6U8A Raytheon USA NOS "O" getter halo 1962 (16.6ma and 9.4ma)
(!!!) (Best Single) 6U8A GE NOS 1975 (20ma/13.6ma) (High Ma and Gm)
(!!!) (Best Single) 6U8A Raytheon USA black plates "O" getter NOS 1960's (20.4ma and 9.5ma)
(!!) (Recommended Single) 6U8A GE NOS 1977 (14.2ma/10ma)
(!!) 6U8=ECF82 Tungsram Hungary rebranded Haltron NOS 1970's (14.3ma and 7.6ma)
(!!) ECF82=6U8 Telefunken <> bottom NOS 1968 (13ma triode and 9.6ma pentode)
(!) (#1 6U8A England single) CV5065=6U8A Thorn AEI England NOS 1966 (18.4ma triode and 10ma pentode) (strong single)
(!) ECF82=6U8 Telefunken <> bottom used/good 1967 (13.4ma triode and 6ma pentode)
(Best Value) 6U8A Rogers Canada NOS 1974 (14.8ma triode and 8ma pentode)
6678 (see 6U8)
6U8A Raytheon USA NOS Black Plates NOS 1960's
6U8A used/good
6U8A=6678 Dumont NOS 1971 (18.5/10.2ma)
6U8A=6678 Dumont NOS 1971 (19.7/7ma)
7687 Sylvania NOS 1962 (sold out)
