(!!!!) (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) 6U8A Sylvania Gold Brand NOS 1970 era (17.0/16.4ma and 10.2/10.4ma)
(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1-2% matched (53-55/40 x 2 tubes)
(!!!!) (Recommended Pair) JAN-6189W=12AU7WA Sylvania NOS 1973-1974 (9.2/9.6ma and 9.8/8.6ma)
(!!!!) (Single) 5670W GE JAN NOS 1986 (9.8/11.6ma)
(!!!!) 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) 6U8A GE Motorola NOS 1977 (15.2ma/9ma)
(!!!) (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) 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
(!!!) (Best Value Pair) ECC84=6CW7 Ultron East Germany by RFT 1970's 2-3% matched (10/11.4ma and 10.2/12ma)
(!!!) (BEST VALUE SINGLE) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's slightly tilted glass (54/40 and 54/40)
