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(!!!!) (Best Pair #1) 6U8A Philips by Sylvania NOS 1986 (16.5/10.6ma and 16.5/10ma)
(!!!!) (Best Pair #2) 6U8A Philips by Sylvania NOS 1986 (17.4/8.3ma and 17.2/8.8ma) 1-3% matched
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania JAN NOS 1986 (19.5/8.4ma and 18.0/8.5ma)
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (15.5/16.0ma and 8.4/8.0ma)
(!!) 6U8=ECF82 Tungsram Hungary rebranded Haltron NOS 1970's (14.3ma and 7.6ma)
(!!) 6U8A Westinghouse NOS 1967 (17.8ma and 9.5ma)
(!!) 6U8A Westinghouse NOS 1967 (24ma and 7.5ma)