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6X4 Philco used/good 1949 (46/40 and 47/40)
6Y6G Arcturus by Tungsol coated glass used/good/70% 1940's (43ma) tested on amplitrex
6Y6G GE 1943 used/good black plate, double filaments, crack in base (56ma) tested on amplitrex
6Y6G GE used/good/75% 1958 (46ma) tested on amplitrex (high Gm)
6Y6G National Union coated glass used/good/75% 1952 (46ma) tested on amplitrex
6Y6G Westinghouse coated glass NOS 1940's (50ma) (tested on amplitrex)
6Y6GT RCA NOS 1964 (66ma)
6Y7G US Brands NOS (12 in stock) ($2.99 special price)
6Y9=EFL200 GE NOS
6Z10=6J10 US Brands (8 in stock)
6Z7G US Brands NOS (4 in stock)
6Z7G used
6ZY5G Philco NOS 1940's (56/40 and 62/40)
6ZY5G RCA NOS 1945 (57/40 and 62/40)
7189A GE NOS 1984 (59.5ma)
7233 GE used/good 1960's no printing (95/60)
7233 GE used/tests like new 1960's no printing (103/60)
7247 GE NOS tall gray ribbed plates 1970's (1.1ma and 9.4ma)
7247=12DW7 GE branded RCA used/good 1960's (0.8/9.3ma)
7355 GE NOS 1970 (60ma) (rare)
