(!!!) (Recommended Single) 12AX7A Sylvania NOS 1970's (Gm=2500/2800 and 2.2/2.7ma)
(!!!) (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)
(!!!) 231=31 US Made Balloon NOS 1920's (14.2ma)
(!!!) 31 RCA Radiotron Balloon NOS 1920's (13.2ma)
(!!) (1 Pair) 31 Cunningham NOS 1940's (11ma and 11.6ma)
(!!) (Best Single) 7AF7 Sylvania branded Hytron NOS round black plates NOS 1952 (9.6/9.4ma) 1-3% section balance
(!!) (BEST SINGLES) JAN-CRC-6U5 RCA NOS Tuning Eye 1952 bright eyes (4 in stock)
(!!) (Good Value) 12AX7A/7025 Sylvania used/good 1970's (Gm=2300/1900)
(!!) (Recommended Pair) 12AX4GTA RCA NOS 1960 (98-99/60)
(!!) (Recommended Pairs) 12AX4GTB Sylvania NOS 1960's (8 pairs)
(!!) (SINGLE) 12BH7A Philco by Sylvania gray plates NOS 1967 (10/11.2ma)
(!!) 12AU7A Sylvania Silvertone NOS 1960's (10.6/11.4ma)
(!!) 12AX7A/7025 Sylvania branded RCA NOS 1970's (Gm=2100/2000)
(!!) 12BH7A Philco Sylvania gray oval plates "O" getter halo used/good 1962 (6.5/7.3ma)
(!!) 227 National balloon used/good, rattle inside base 1930 era (5.3ma)
(!!) 6BQ5 Sylvania gray plate NOS 1960's (63.5ma)
(!!) 6BQ5 Sylvania gray plate NOS 1970's (44ma)
(!!) 6L6GAY Sylvania brown base NOS 1956 aged 48-hours (84.2ma)
