(!!!!) 6973 RCA gray plate NOS 1975 (43ma)
(!!!) (Best Single 1966) 12AX7A RCA ribbed plates NOS 1966 (Gm=1800/1600, 1.3/1.0ma) (best tone, 2nd best to Mullard)
(!!!) (Good Value Single) 12AX7A RCA Magnavox ribbed plates used/good 1961 (Gm=1500/1900 and 0.8/1.3ma)
(!!!) (Good Value Single) 12AX7A RCA ribbed plates NOS 1974 (Gm=1600/1400, 1.1/0.8ma)
(!!!) (Good Value Single) 12AX7A RCA ribbed plates used/good 1960's faded printing (Gm=1400/1700 and 0.8/1.1ma)
(SINGLE) 2050 GE NOS (6 in stock) (BEST PRICE)
(SINGLE) 2050A GE coin-base NOS (6 in stock) (BEST PRICE)
2050 GE burgundy base NOS 1952
2050 RCA NOS 1968
2050A GE coin-base NOS 1970's (4 in stock)
2050A GE NOS 1963 (single)
2050A GE rebranded Amperex NOS (single)
2050W Chatham by Tungsol NOS 1959 (2 in stock)
6973 RCA black plate used/good 1950's (34ma)
6973 RCA gray plate used/good 1970 era (56.5ma)
6973 Sylvania gray plate NOS 1970's (61ma)
6CM6 US Brands used/good (6 in stock)
