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(!!!!) (Recommended Pair) 6AW8A GE NOS 1968-1970 (3.5/22ma and 4.1/27ma) (Shindo)
(!!!!) (Recommended Pair) 6BQ7A RCA black plates NOS 1964-1968 (9.2/11.2ma and 10.2/11ma)
(!!!!) (Recommended Pair) 6BQ7A RCA black plates NOS 1967 same date codes (11.8/12ma and 11/12.2ma)
(!!!!) (Recommended Pair) 6C4C=6B4G Russian NOS 1958-1967 (79ma and 85ma) (one of the best sounding 6B4G ever made)
(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (4.9/4.6ma and 42/43ma)
(!!!!) (Recommended Pair) 6J5GT Raytheon black ribbed plate NOS 1940's (8.4ma and 8.8ma) (High Gm)
(!!!!) (Recommended Pair) 6L6GT Russian branded Raytheon NOS 1970's in white boxes (83ma and 84.5ma)
(!!!!) (Recommended Pair) 6L6GT=6n3C Russian NOS 1982 in white boxes (74.6ma and 75.0ma)
(!!!!) (Recommended Pair) 6L6GT=6n3C Russian NOS 1982 in white boxes (76.2ma and 77ma)
(!!!!) (Recommended Pair) 6SN7GTA GE NOS "U" getter halo - side getter - copper grid posts 1952-1953 (6.6/7.8ma and 6.6/8.2ma) (close Gm) 1-3% matched
(!!!!) (Recommended Pair) 71A Westinghouse Canada NOS 1949 in white boxes (23ma and 27.3ma)
(!!!!) (Recommended Pair) 7N7 Sylvania branded GE chrome top NOS 1954-1956 (7.4/7.0ma and 7.4/7.2ma) 1-2% matched
(!!!!) (Recommended Pair) 807 RCA black plate NOS 1970's (59.4ma and 60.5ma)
(!!!!) (Recommended Pair) 8417 Sylvania branded RCA NOS 1972-1973 (119.2ma and 123.7ma)
(!!!!) (Recommended Pair) 8D8=EF86 Brimar UK quad mica NOS 1961 (2.8ma and 3.0ma) 1-5% matched
(!!!!) (Recommended Pair) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.0/10.4ma and 9.4/10.0ma) 1-3% matched
(!!!!) (Recommended Pair) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.6/8.8ma and 9.4/9.0ma) 1-2% matched
(!!!!) (Recommended Pair) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.6/9.4ma and 9.8/9.6ma) 1-3% matched (same Gm)
(!!!!) (Recommended Pair) JAN-12AT7WC Philips by Sylvania black plates NOS 1981-1982 (8.3/8.4ma and 8.4/7.8ma)
(!!!!) (Recommended Pair) JAN-5755 Raytheon Black Plates NOS 1971-1979 (1.5/1.7ma and 1.5/1.8ma)
