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22KV6A Dumont Raytheon Japan branded made in USA (1 in stock)
22KM6=22JF6 Sylvania NOS (1 in stock)
7247=12DW7 GE branded RCA used/good 1960's (0.8/9.3ma)
(!) (Best Single) 6JT8 GE NOS (2.1/27ma)
(!!!) (Single) 7199 RCA Black Plates NOS 1970 era (10.6/8.6ma)
EABC80=6AK8 Valvo Germany used/good 1959 (0.8ma)
(!!) (Recommended Single) 6AN8A Sylvania NOS 1960's (16.4/11.5ma)
(!!!) 12AU7A GE "U" getter low hours/tests like new 1957 (10.0/8.8ma)
(!) (Best Value Single) 5687WA Sylvania JAN used/good faded printing 1970's (31/35.8ma)
(!) ECC189=6ES8 Amperex Globe Logo Holland NOS 1969 (17.8/17.2ma)
(!!!) (BEST PRICE) 12AU7A GE used/good 1969 - 1980 (4 for $29.99)
(!!!!!) (Best Overall Single) CK-5687WB Raytheon black plates NOS 1960's (40.5ma/42ma) (Audio Note, Modwright, Manley) Highest mA and Gm
(!) (Best Pair) 6KT8 Sylvania NOS 1970's (4.4/12ma and 5.2/13ma)
(Best Single) 6KT8 US Brands NOS (7/16) (highest testing single)
6JT8 Sylvania big bottle NOS 1960's (3.1/18ma)
(!!) (Best Value Pair) 6FQ7 GE branded Amperex and Westinghouse NOS 1970's (6.4/7.4ma and 6.4/7.4ma) 1-2% matched
6CS7 RCA NOS 1970's (23.6ma and 13.5ma)
(!!!!) (Best Quad #1) 6SH7 GE metal can NOS 1976 (10.6, 10.6, 10.4, 10.5mA)
(!!) (Best Quad #2) 6SH7 GE metal can NOS 1976 (8.6, 9, 9, 9mA)
(!!) (Best Pair #1) 6SH7 GE metal can NOS 1976 (12.8ma and 13.2ma) **
