(!!!!!) (Best Value Single) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new faded printing (2.9/3.2ma) (mic, preamp, amp)
(!!!!) (2nd Best Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new faded printing (2.6/2.7ma and 2.7/2.8ma) 1-3% matched (Same Gm)
(!!!!) (Best 5 Star Single) 5751 GE 5-Star gray plates NOS 1964 (2.1/2.5ma)
(!!!!) (Best 5 Star Single) 5751 GE 5-Star gray plates NOS 1964 (2.8/3.1ma)
(!!!!) (Best Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new faded printing (2.8/2.9ma and 2.8/2.9ma) 1% matched
(!!!!) (Best Single 1957) JG-5751WA GE NOS black plates triple mica U getter halo 1957 (2.3/2.7ma) (High mA and Gm)
(!!!!) (Best Single 1964) USN-CHS-5751W1 Sylvania NOS gray plates triple mica O getter halo 1964 (2.7/2.5ma) (same Gm)
(!!!!) (Best Single) 5751 Siemens Halske Germany triple mica NOS 1966 (2.6/3.0ma)
(!!!!) (Best Single) 5814A RCA COMMAND SERIES NOS black plates 1964 (11/11ma) 1% section balance
(!!!!) (Best Value Single) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/good (2.0/2.1ma)
(!!!!) (Recommended Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new (2.4/2.8ma and 2.5/2.6ma) 1-3% matched (same Gm)
(!!!!) (Recommended Single) JG-5751WA GE NOS black plates triple mica D getter halo 1955 (2.1/2.5ma)
(!!!) (3rd Best Pair) USN-12AT7WB=6201 GE gray plates "U" getter triple mica 1959 (9.2/7.2ma and 8.5/7.5ma) (BEST 6201)
(!!!) (Best Overall Single) 5751 GE 5 Star NOS 1965 (2.6/2.6ma) 1% section balance
(!!!) (Best Overall Single) E81CC=12AT7 Siemens double mica NOS 1976 (11.4/12ma) (high Ma and Gm)
(!!!) (Best Single #2) 6688=E180F Amperex PQ USA NOS 1965 (15.2ma)
(!!!) (Best Single 1956) JG-5670WA GE triple mica with D getter NOS 1956 (7.8/7.0ma)
(!!!) (Best Single 1956) JG-5670WA GE triple mica with D getter NOS 1956 (8.6/9.0ma) (same Gm)
(!!!) (Good Value Single) 5751 RCA black plates triple mica "D" getter low hours/tests like new 1950's (2.4ma/2.5ma)
(!!!) (Single) JG-5670WA GE triple mica with D getter NOS 1956 (5.5/5.8ma) (same Gm)