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(!!!!) (Best 6094 Quad) JAN-CEA-6094 Bendix gold pins NOS 1957 (55/57/57/58ma)
(!!!!) (Best Overall Single) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1967 (1.5/1.5ma and Gm=1800/1800) 1% section balance
(!!!!) (Best Pair #1) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (10.7/10.6ma and 10.6/11.0ma) (closely matched)
(!!!!) (Best Pair #2) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (12.8/11.2ma and 13.8/11.5ma) (closely matched)
(!!!!) (Best Pair #3) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (10.2/8.8ma and 10.6/9.2ma) (closely matched)
(!!!!) (Best Single #2) ECC803S=12AX7 Telefunken Qualitex Ulm Germany <> bottom like new 1964 (1.3/1.5ma and Gm=1600/1800)
(!!!!) (Best Single) JAN-5687WA Sylvania NOS 1967 (38/39ma) (Highest Ma and Gm)
(!!!!) (Best Single) JHS-5687WA Sylvania NOS 1966 (46/48ma) (Highest Ma and Gm)
(!!!!) (Best Single) USN-CHS-6922 Sylvania gold pins NOS 1965 (12/16.6ma)
(!!!!) (Best Value Single) JAN-6922 Amperex USA like new 1971 (13.4/12.6ma)
(!!!) (Best Value Single) 6922=E88CC Tesla Czech Republic NOS 1967 (12/15.7ma) (mis-matched Gm) (recommended for mic)
(!!!) (Recommended Pair) JAN-6922 Sylvania NOS 1971-1979 (17.6/18.3ma and 15.0/18.4ma) (smooth presentation)
(!!!) (Single 1966) 6688=E180F Siemens Holland NOS gold pins 1966 (8ma)
(!!!) (Single) 6688=E180F Amperex PQ USA NOS "O" getter 1968 (9ma)
(!!!) (slightly microphonic) 6922=E88CC Tesla Czech Republic NOS 1970 (22/21ma)
(!!) (Best Single) E180F=6688 Philips Miniwatt SQ Holland gold pins "D" getter NOS 1957 (14.2ma)
(!!) (Recommended pair) E83F=6689 Philips SQ Holland NOS gold pins 1974 (9.4ma and 9.6ma)
(!) (Best Single) E83F=6689 Siemens Holland NOS gold pins 1968 (15.2ma)
407A Sylvania branded RCA gold pins used/good 1971
407A Sylvania gold pins used/good 1960's
