(!!!!!) (Best Overall Single) 280 Silvertone like new 1930 era (50/40 and 53/40)
(!!!!!) (Best Overall Single) 6SC7GTY Tungsol NOS black round plates NOS 1950 era - small chip out of base (2.1ma and 2.2ma)
(!!!!) (Best Single) 12BH7A GE ribbed plates NOS 1980 (10.0/10.2ma) 1-3% section balance
(!!!!) (Best Single) 12BH7A Sylvania rebranded GE black oval plates "U" getter NOS 1956 era (11.2/14ma)
(!!!) (Best Overall UV-99) C-299=UV-99 Cunningham NOS 1920's with tube data sheet (3.4ma) (highest Ma) (UV have small pins)
(!!!) (Good Value Pair) 6SC7 GE metal can NOS 1977 (1.6/1.9ma and 1.6/1.9ma) 1% matched
(!!!) (Good Value) 12AX7 RCA "long gray plates" with "D" getter used/good 1960 good printing (0.6/0.7mA and Gm=1400/1500)
(!!!) (Recommended Pair) 6SC7 GE metal can NOS 1969-1977 (1.7/1.9ma and 1.6/1.8ma) (same Gm)
(!!!) (Recommended Pair) 6SC7 GE metal can NOS 1977 (1.7/1.7ma and 1.7/1.8ma) 1-2% matched
(!!!) (Recommended Pair) 6SC7 GE NOS 1977 (1.7/2.1ma and 1.8/2.1ma) 1-3% matched
(!!!) (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)
(!) (PAIR) 12SJ7 RCA 1960's NOS rebranded United 1982 (3.2ma and 3.2ma)
(!) (PAIR) 12SJ7 RCA NOS 1958 (2.8ma and 2.4ma)
(!) 30 Philco engraved base NOS 1930's (3.7ma)
(BEST PRICE) 25Z6GT US Brands NOS (10 for $29.99)
(BEST PRICE) 25Z6GT US Brands NOS (4 for $14.99)
(display tube) UV-99 Radiotron brass base 1920's - lights up but does not have emission
(display tube) UV-99 Radiotron brass base 1920's tarnished base - lights up
