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(!!) 286A Western Electric low hours/tests like new "top printing" 1942-1945 (6.8ma)
(!!) 5751W1 Sylvania triple mica "O" getter halo used/good early 1960's misbranded 12AX7WA (1.8/2.0ma)
(!!) 5842 Raytheon branded RCA NOS 1976 (20ma and Gm=20,000)
(!!) 5963=12AU7 RCA NOS 1963 (9.2/9.6ma)
(!!) 6350 RCA NOS triple mica "U" getter NOS 1960 era (12.8/13.2ma)
(!!) 6AN8A GE Great Britain NOS 1970 era (15/12ma)
(!!) 6AN8A RCA NOS 1970 era (16.6/13.4ma)
(!!) 6BH6 GE black plate NOS "U" getter halo 1953 (6.5ma)
(!!) 6BH6 GE black plate NOS "U" getter halo 1956 (8.0ma)
(!!) 6BM8=ECL82 Philiups Miniwatt by Mullard used/good 1959 (1.8ma/23ma)
(!!) (SINGLE) 6BM8=ECL82 Valvo Holland used/good 1960 (1.9ma/34ma)
(!!) (Recommeded Pair) 6BX7GT GE branded NOS "D" getter 1958 - 1 tube branded RCA (72ma/95ma and 92/87ma) (highest mA and Gm)
(!!) 6BX7GT Sylvania black plates NOS 1960's (56ma/76ma)
(!!) 6BX7GT Sylvania branded GE black plates 1967 (44ma/61ma)
(!!) 6DJ8 EI YUGO used/good 1977 branded RCA 1984 (13.4/15.6ma)
(!!) 6DJ8 Mullard UK used/good 1965 (14.2/15.8ma)
(!!!) (Siemens Single) 6DJ8 Siemens Halske Germany branded RCA NOS 1967 printed in 1969 (14.2/14.5ma)
(!!) (Best Pair) 6EA7=6EM7 Sylvania coin-base NOS 1970's (1.8/53.6ma and 1.4/57ma)
(!!) (Recommended Pair) 6EU7 GE NOS 1970-1978 (44-48/32 and 43-48/32)
(!!) 6SN7GT RCA used/good 1953 (6.6/7.6ma)
