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5U4GB Sylvania Canada NOS 1960's (61/40 and 64/40) (similar build to RCA)
6SN7GTB RCA used good 1960's (6.4/8.2ma)
(!!!) (Best Pair) 6CS7 RCA gray plates NOS 1970 era (20/10.6ma and 21/12.2ma)
(!!!) (Best Pair) 5Z4 RCA NOS 1959 (52-52/40 and 52-52/40)
6JE6C=6LQ6 GE used/good 1970 era (71ma)
6BA8A RCA NOS (12 in stock)
5886 NOS (10 in stock)
0D3 RCA NOS 1940's (argon)
8072 RCA NOS (4 in stock)
(Best Single) 6C8G RCA gray plates NOS 1961 (4.0/3.8ma) (Same Gm)
(!) Recommended Pair) 37 RCA branded GE NOS 1946 and RCA like new 1930's (7.3ma and 8.3ma)
(!!!!) (Best Pair 1963) 5U4GB GE NOS 1963 same date codes (60-62/40 and 60-60/40 x 2 tubes)
6SJ7 US Brands used/good (40 in stock)
1H5GT RCA Radiotron NOS in RCA Victor box
807 RCA 1940's used/tests like new white heat shrink around base (68ma)
(!!!) (Best Value Single) 5998A Sylvania JAN NOS 1980 (109/136mA)
(!) (PAIR) 0D3 RCA NOS 1951-1969 same build (argon)
(!!) (PAIR) 12AL5 RCA NOS 1973 (46-47/40 and 46-47/40)
5V3 Raytheon branded RAD-TEL NOS 1961 (53/40 and 54/40)
6EM7 RCA coin-base used (2.5ma/28ma)
