(!!!!) (Recommended Pair) G-27 Majestic Balloon used/good 1930 era (4.7ma and 4.8ma)
(!!!!) UX-280 RCA Radiotron Balloon used/60% 1930 era some white oxide flakes inside tube (38/40 and 38/40)
(!!!) (2nd Best Pair) 26 Sylvania chrome plate NOS 1940's (5.3ma and 5.3ma)
(!!!) (Best 12A Pair) 12A Coronado USA NOS 1940-1948 same build (7.0ma and 7.5ma)
(!!!) (BEST PAIR #2) 47 RCA branded ARCTURUS NOS 1940's (34.5ma and 35.2ma)
(!!!) (BEST PAIR #3) 47 RCA branded ARCTURUS NOS 1940's (40ma and 40.2ma)
(!!!) (Best Pair) 26 Sylvania branded Zenith black plate NOS 1946 (5.4ma and 5.6ma) (rare)
(!!!) (Best Pair) 99=X99 Ken Rad NOS 1940's (2.5ma and 2.6ma)
(!!!) (Best Single) 127 Arcturus Blue Balloon tests like new 1930 era in white box (5.6ma) (High Ma and Gm)
(!!!) (Pair) 26 Super Silvertone ST-14 engraved base used/good 1930's (4.3ma and 4.8ma)
(!!!) (Recommended Pair) 26 GE and Ken Rad NOS same build 1940's (3.9ma and 4.0ma)
(!!!) (Recommended Pair) 26 Sylvania branded Zenith black plate NOS 1946 (4.9ma and 5.0ma) (rare) 1% matched
(!!!) (Recommended Pair) 6SC7 GE NOS 1977 (1.7/2.1ma and 1.8/2.1ma) 1-3% matched
(!!!) (Recommended Pair) CX-326 Cunningham balloon used/good 1930 era (5.0ma and 5.2ma)
(!!!) (Recommended Single) 127 Arcturus Blue Balloon used/good 1930 era in white box (4.3ma)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's (2.3ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's with tube data sheet (2.4ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's with tube data sheet (2.6ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) 280 Wizard Balloon used/60% 1930 era rattle inside base (38/40 and 39/40)
(!!!) 80 Cunningham Balloon used/good 1930 era some white oxide flakes inside tube (44/40 and 48/40)