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(!!) UY-227 RCA Radiotron Balloon used/good 1930 era (3.5ma)
(!!) UY-227 RCA Radiotron Balloon used/good 1930 era (3.7ma)
(!!) UY-227 RCA Radiotron Balloon used/good 1930 era (3.8ma)
(!!) UY-227 RCA Radiotron Balloon used/good 1930 era (4.0ma)
(!) (#1 47 Single) 47 RCA NOS 1940's reprinted - small hairline crack in base (37ma Gm=2700) (highest Ma and Gm)
(!) (#1 6AU5GT RCA PAIR) 6AU5GT RCA black plates NOS rebranded same build (64ma and 64.5ma)
(!) (#1 6AU5GT Sylvania Pair) 6AU5GT Sylvania black plates NOS 1970 (63ma and 66.5ma)
(!) (#1 802 Pair) 802 RCA Deforest NOS original boxes 1943
(!) (#1 81 ST-19 glass shape) 81 ST-19 Purotron made by RCA "engraved base" NOS in Sparton box 1940's (56/40) (strong output)
(!) (#1 Type 30 single) 30 RCA Victor NOS 1940's original box (4.3ma)
(!) (#2 24 Balloon) 124 Crosley by Arcturus Balloon used/tests like new 1930's (48/25) (3.0ma)
(!) (- BEST VALUE) 6AU5GT GE gray plates NOS 1960's (1 pair: 55ma and 56ma)
(!) (1 PAIR) 0C3 GE branded 0C3A NOS 1976 (argon)
(!) (1 Pair) 1625=VT-136 RCA like new mid-1940's (72/40 and 70/40)
(!) (1 Pair) 1625=VT-136 RCA like new mid-1940's (82/40 and 82/40)
(!) (1 Pair) JAN-CHS-1625 Sylvania 1940's like new (72/40 and 72/40)
(!) (2nd Best Pair) 2A5 Sylvania NOS 1947 (83/50 and 83/50)
(!) (BEST GE SINGLE #2) 6JE6C=6LQ6 GE NOS 1980 (76ma)
(!) (BEST GE SINGLE) 6JE6C=6LQ6 GE NOS 1976 (86ma)
(!) (Best Pair 1950's) 5651 RCA NOS 1950's (1 pair)
