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Preamp tubes

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(!!!!) (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm)

(!!!!) (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm)

$ 288.88
(!!!!) (Best Pair) 311B Amperex made in Russia NOS 1977 (34.2ma and 34.5ma) (very good construction)

(!!!!) (Best Pair) 311B Amperex made in Russia NOS 1977 (34.2ma and 34.5ma) (very good construction)

$ 79.99
(!!!!!) (BEST PAIR #1) 417A Western Electric NOS 1980 (42.5ma and 40ma) (close Gm)

(!!!!!) (BEST PAIR #1) 417A Western Electric NOS 1980 (42.5ma and 40ma) (close Gm)

$ 279.99
(!!!!) (Recommended Pair) 311B Western Electric NOS 1973 and 1975 (35.2ma and 36.4ma)

(!!!!) (Recommended Pair) 311B Western Electric NOS 1973 and 1975 (35.2ma and 36.4ma)

$ 188.88
(!!!) (#1 286A) 286A Western Electric

(!!!) (#1 286A) 286A Western Electric "top printing" NOS 1942-1945 (7.0ma)

$ 99.99
(!!!) (Best Pair #3) 448A Western Electric tipped top used/strong 1965 (30ma and 32ma) (Matched on Amplitrex)

(!!!) (Best Pair #3) 448A Western Electric tipped top used/strong 1965 (30ma and 32ma) (Matched on Amplitrex)

$ 119.99
(!!!) (2nd Best Pair) 311B Amperex made in Russia NOS 1977 (31.8ma and 33.2ma) (very good construction)

(!!!) (2nd Best Pair) 311B Amperex made in Russia NOS 1977 (31.8ma and 33.2ma) (very good construction)

$ 79.99
(!!!) (Best Single) 311B Western Electric NOS 1956 (31.6ma)

(!!!) (Best Single) 311B Western Electric NOS 1956 (31.6ma)

$ 149.99
(!!!) (MATCHED QUAD) JAN-CW-231D Western Electric NOS 1953 (1.6/1.6/1.6/1.5ma) 1-2% matched

(!!!) (MATCHED QUAD) JAN-CW-231D Western Electric NOS 1953 (1.6/1.6/1.6/1.5ma) 1-2% matched

$ 249.99
(!!!) (Recommended PAIR 1953) JAN-CW-231D Western Electric NOS 1953 (1.5ma and 1.5ma)

(!!!) (Recommended PAIR 1953) JAN-CW-231D Western Electric NOS 1953 (1.5ma and 1.5ma)

$ 139.99
(!!!) (Recommended PAIR 1953) JAN-CW-231D Western Electric NOS 1953 (1.8ma and 1.8ma)

(!!!) (Recommended PAIR 1953) JAN-CW-231D Western Electric NOS 1953 (1.8ma and 1.8ma)

$ 139.99
(!!!) (Recommended Pair) 311B Amperex made in Russia NOS 1977 (37.2ma and 38.5ma) (Highest mA and Gm)

(!!!) (Recommended Pair) 311B Amperex made in Russia NOS 1977 (37.2ma and 38.5ma) (Highest mA and Gm)

$ 79.99
(!!!) (Recommended Pair) 311B WE used/good 1960-1961 partially faded getters (24.5ma and 26.5ma)

(!!!) (Recommended Pair) 311B WE used/good 1960-1961 partially faded getters (24.5ma and 26.5ma)

$ 109.99
(!!!) (~ RECOMMENDED PAIR ~) 329A Western Electric NOS 1956 (33ma and 34ma)

(!!!) (~ RECOMMENDED PAIR ~) 329A Western Electric NOS 1956 (33ma and 34ma)

$ 149.99
(!!!) (Best Pair #3) 448A Western Electric tipped top used/good 1965-1966 (28ma and 29.2ma) (same Gm)

(!!!) (Best Pair #3) 448A Western Electric tipped top used/good 1965-1966 (28ma and 29.2ma) (same Gm)

$ 109.99
(!!!) 286A Western Electric

(!!!) 286A Western Electric "top printing" NOS 1942-1945 (6.6ma)

$ 109.99
(!!!) 286A Western Electric

(!!!) 286A Western Electric "top printing" NOS 1942-1945 (6.9ma)

$ 119.99
(!!!) 286A Western Electric

(!!!) 286A Western Electric "top printing" NOS 1942-1945 (7.3ma)

$ 119.99
(!!!) 286A Western Electric Engraved Base NOS 1930's (6.6ma)

(!!!) 286A Western Electric Engraved Base NOS 1930's (6.6ma)

$ 139.99
(!!!) 286A Western Electric NOS

(!!!) 286A Western Electric NOS "top printing" 1942-1945 smaller side getter (7.6ma)

$ 119.99
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