(!!) (Best Pair) 6J6A Tungsol NOS "D" getter 1961 (9.4/10.5ma and 9.0/11.4ma)
(!!!) (Recommended Pair) 713A Western Electric by Tungsol NOS 1942-1943 (6.6ma and 6.9ma) (713A = 717A with black base)
(!!) (2nd Best Pair) 7199 Sylvania NOS 1960's and 1985 same build (12.5ma/9.6ma and 12.3/10.2ma) 1-3% matched
UX-201-A RCA Radiotron Balloon tests like new 1930's (read review)
(!!) (Best Value Single) JAN-6922 Sylvania NOS 1971 tilted glass (19.0/17.2ma)
(!!) (Best Pinched Waist 1956) E80F=6084 Philips Miniwatt Holland NOS Rugged Reliable Long-Life "Pinched Waist" with "D" getter halo 1956 (3.1ma)
(!!) (BEST PRICE) 12AU6 US Brands NOS (10 tubes for $29.99)
(!!) (BEST PRICE) 6AC7 Mixed US Brands (4 tubes for $14.99)
(!!) (BEST PRICE) 6AC7W RCA used/good (4 tubes for $8.99)
(!!) (BEST PRICE) 6SR7 US Brands metal can NOS (4 tubes for $14.99)
(!!) (Good Value Pair) ECC85=6AQ8 RCA Japan by Hitachi 1970's (10/15ma and 10.4/14.4ma)
(!!!!) (SINGLE) 12AU7A GE NOS 1963 copper grid posts (8.9/10.2ma)
(!!) 403B=6AK5 Western Electric NOS "D" getter 1969 (6.5ma)
(!!) (Best Single) 5920=E90CC Amperex PQ Holland 1968 (8.0/8.4ma)
(!!!!) (Best Overall Single) GB-5963=12AU7 Sylvania Gold Brand Gold Pins NOS 1960's (11.2/13.6ma)
(!!!) (Recommended Pair) 6BX7GT GE branded Tungsol black plate "D" getter NOS 1957 (53ma/57ma and 48/53ma)
(!!!!) (BEST PAIR) 6DJ8 Sylvania branded GE NOS 1961-1962 (21.6/23ma and 21.5/22ma)
(!!) (BEST SINGLE) 6DN7 GE branded RCA NOS 1960's (64ma and 7.2ma)
(!!) (Best Single) 6EW7 Sylvania BIG BOTTLE NOS 1960's (7.8/56ma) (highest Ma and Gm)
(!!) (Best Single) 7AF7 Sylvania branded Hytron NOS round black plates NOS 1952 (9.6/9.4ma) 1-3% section balance
