56 RCA used/good 1940's (4.7ma)
56 RCA used/good 1940's plate slightly tilted (4.9ma)
56 Super Airline used/good 1940's (4.1ma)
56 Sylvania branded RCA NOS 1946 (6.0ma)
56 Tungsol rebranded Raytheon tests like new 1940's (6.1ma)
56 Ultron UK used/good 1952 (4.5ma)
6973 RCA black plate like new 1959 (44ma)
6973 RCA black plate used/good 1950's (34ma)
6973 RCA gray plate used/good 1970 era (56.5ma)
6AU5GT used/good
6BH6 RCA black plate NOS "D" getter halo 1951 (5.1ma)
6BH6 RCA black plate NOS "D" getter halo 1961 (6.3ma)
6BQ5 RCA gray plate used/good 1967 (32.6ma)
6BQ5 RCA Magnavox gray plate used/good 1961 (44ma)
6L6GB GE Black Plate used/good 1957 (59ma)
6L6GB Sylvania Black Plate used/good 1955 faded top getter (57ma)
6L6GB Sylvania Black Plate used/good 1955 faded top getter (65ma) (high Ma and Gm)
6L6GC Sylvania gray plate used/tests like new 1960's (66ma)
6V6GT GE Delco used/good crack in base 1952 (36ma)
7027A RCA metal base gray plate NOS 1960 (74.2ma)
