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(!!!!) (Best Pair #1) 6BX7GT Sylvania triple mica "O" getter NOS 1960 era (74/66.5ma and 78.5/68.5ma) (same Gm)
(!!!!) (Best Pair #1) 6J5GT Raytheon metal base black ribbed plate NOS 1940's (8.5ma and 8.7ma) (1-3% matched)
(!!!!) (Best Pair #1) 6LQ6=6JE6C Raytheon Japan NOS 1970's (112ma and 109ma)
(!!!!) (Best Pair #1) E80CC=6085 Philips and RTC Holland gold pins NOS 1961-1972 (6.3/6.8ma and 6.1/6.9ma) 1-3% matched
(!!!!) (Best Pair #1) JAN-5842WA Raytheon NOS 1984 original boxes (28ma and 30ma) 1-5% matched
(!!!!) (Best Pair #2) 5670W GE NOS 1986 (9.4/11ma and 9.8/11.6ma) 1-5% matched (Highest Ma and Gm)
(!!!!) (Best Pair #2) 5814A Philips JAN NOS 1985 (10.5/8.2ma and 10/8.3ma) (close Gm)
(!!!!) (Best Pair #2) 5842Q Raytheon NOS 1983 (23ma and 24ma) 1-3% matched
(!!!!) (Best Pair #2) 6AC7 GE NOS 1980-1982 (10ma/11.2ma)
(!!!!) (Best Pair #2) 6BX7GT Sylvania triple mica "D" getter NOS 1950's (52.2/47ma and 48/44ma)
(!!!!) (Best Pair #2) 6BX7GT Sylvania triple mica "D" getter NOS 1950's (60/55ma and 52/54ma)
(!!!!) (Best Pair #2) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (8.4/8.8ma and 8.4/9.0ma) 1-2% matched (same Gm)
(!!!!) (Best Pair #2) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (8.6/8.8ma and 8.8/9.2ma) 1-3% matched
(!!!!) (Best Pair #2) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (8.8/8.4ma and 8.4/8.8ma) 1-2% matched
(!!!!) (Best Pair #2) E80CC=6085 Philips Holland 1963-1972 (6.1/6.8ma and 6.2/7.1ma) (Highest mA and Gm)
(!!!!) (Best Pair #2) E810F=7788 Amperex PQ USA NOS gold pins 1974-1976 (53ma and 53.5ma)
(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)
(!!!!) (Best Pair #2) JAN-5755 Raytheon Black Plates NOS 1973 (1.6/1.7ma and 1.7/1.8ma) (High Gm)
(!!!!) (Best Pair #2) JAN-6528A Cetron USA test like new 1987-1989 (102/110mA and 104/106.5ma)
(!!!!) (Best Pair #3) 5670W GE NOS 1986 (7.8/8.8ma and 7.6/8.2ma) 1-5% matched
