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(!!!!) (BEST SINGLE) 201-A Silvertone Balloon NOS 1930 era (3.8ma and Gm=750)
(!!!!) (BEST SINGLE) 5U4GB Raytheon "O" getter NOS 1962 (58/40 and 60/40)
(!!!!) (Best Single) 5V4G Ken Rad black plates NOS 1945 (60/40 and 60/40)
(!!!!) (Best Single) 6146B GE NOS 1980 (121ma)
(!!!!) (Best Single) 6L6GC RCA black plate NOS 1962 (88ma)
(!!!!) (Best Single) 6SN7GTB RCA branded GE NOS 1970 (9.0/9.2ma)
(!!!!) (Best Single) 7025 RCA gray pinched plates tests like new 1961 (Gm=1600/1700 and 1.2/1.3mA) (recommended for V1 guitar amp)
(!!!!) (Best Single) 83 RCA Radiotron NOS 1940's (60-59/40)
(!!!!) (Best Single) CRP-6CG7 Raytheon black plates and black electrostatic shield and "O" getter halo 1962 (8.0/8.8ma)
(!!!!) (Best Single) CX-345 Cunningham Balloon used/tests like new 1930 era (41ma)
(!!!!) (Best Single) JAN-5687WA Sylvania NOS 1967 (38/39ma) (Highest Ma and Gm)
(!!!!) (Best Single) JAN-83 RCA NOS 1962 (59-60/40)
(!!!!) (BEST SINGLE) JAN-CHY-5U4G CBS NOS 1957 (58/40 and 60/40)
(!!!!) (Best Single) JHS-5687WA Sylvania NOS 1966 (46/48ma) (Highest Ma and Gm)
(!!!!) (BEST SINGLE) UX-201-A RCA Radiotron Balloon NOS 1930 era (3.9ma and Gm=700)
(!!!!) (Best Sounding Pair #1) JAN-CHS-80 Sylvania NOS 1944 (52-55/40 and 52-56/40)
(!!!!) (Best Value Pair #1) 12AX7A RCA gray ribbed plates NOS 1967-1973 (best tone) (0.9/0.9ma and 0.9/1.1ma) (Fender)
(!!!!) (Best Value Pair #1) 71A RCA/Cunningham Radiotron used/tests like new 1930's (24.5ma and 26ma)
(!!!!) (Best Value Pair) 6146B GE NOS 1974 and 1985 (86ma and 90.5ma)
(!!!!) (Best Value Pair) 6BQ5 GE NOS 1959-1960's (43ma and 46ma)