(!!!!) (Recommended Pair) 6FQ7 Zenith by GE NOS 1977 (6.2/8.0ma and 6.0/8.4ma)
(!!!!) (Recommended Pair) 6FQ7 Zenith by GE NOS 1977 (6.5/10.6ma and 6.7/9.2ma)
(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1% matched (53-54/40 x 2 tubes)
(!!!!) (Recommended Pair) JAN-6189W=12AU7WA Sylvania NOS 1972-1973 (9.6/10.6ma and 9.3/10.4ma) 1-3% matched
(!!!!) (Single) 5670W GE JAN NOS 1986 (10/11.6ma)
(!!!!) 6AK5 GE NOS 1973 (10.2ma)
(!!!) (Best Pair) 6AH6WA GE NOS 1980's (10.5/10.3ma)
(!!!) (Best Pair) 6AH6WA GE NOS 1980's (10.6/11ma)
(!!!) (Best Pair) 6C4WA GE JAN NOS 1971-1973 (9.2/9.4ma) 1-3% matched (Conrad Johnson)
(!!!) (Best Price) 5726=6AL5 Sylvania JAN NOS (4 for $8.99)
(!!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS "O" getter halo 1960 era (10.8/11.4ma)
(!!!) (Best Single) 6189=12AU7WA=E82CC Sylvania NOS 1960's in white box (10/10.2ma) (Same Gm) 1-2% section balance
(!!!) (Best Single) 6U8A GE Motorola NOS 1977 (15.2ma/9ma)
(!!!) (Best Single) 6U8A GE NOS 1961 (17ma/9.6ma)
(!!!) (Best Single) JAN-6C4WA GE NOS 1967-1968 (11.8ma)
(!!!) (Best Value Pair) 6106 Bendix 1950's rebranded 5Y3WGTA Heintz & Kaufman NOS (66/40 and 70/40 x 2 tubes)
(!!!) (BEST VALUE PAIR) 6267=EF86 Amperex East Germany by RFT NOS 1970's (2.7ma and 2.7ma)
(!!!) (Best Value Pair) 6BL8 Motorola Golden JAPAN by Toshiba "Premium Rated" NOS 1974 (1 pair)
(!!!) (Best Value Pair) 6C4WA GE JAN NOS 1966-1967 (7.8/7.8ma) 1-2% matched