(!!!!!) (Best Pair) 6DJ8=ECC88 Philips Miniwatt Holland "o" getter halo NOS 1963-1964 (19.6/18.0ma and 17.0/20.0ma)
(!!!!!) (Best Pair) 6DJ8=ECC88 Philips Miniwatt Holland "o" getter halo NOS 1963-1964 (20.2/19.2ma and 22.2/20.0ma)
(!!!!!) (Best Pair) 6DJ8=ECC88 Philips Miniwatt Holland NOS 1960-1963 (16.6/17.0ma and 15.8/16.6ma) 1-5% matched
(!!!!!) (Best Pair) JAN-12AT7WC Sylvania black plates NOS 1976 (11.2/12.2ma and 11.2/11.0ma)
(!!!!!) (Recommended 5 Star Single) 5751 GE "5 Star" NOS gray plates triple mica "U" getter 1956 (2.1/2.2ma)
(!!!!!) (Recommended Pair 1959) 6DJ8=ECC88 Philips Miniwatt Holland large "O" getter halo NOS 1959 etched section on each tube (18.6/15.4ma and 16.4/15.8ma)
(!!!!) (Best Brimar Single 1967) CV4024=12AT7WA Brimar NOS square black plates 1967 (11.2./11.4ma)
(!!!!) (Best Brimar Single) CV4024=12AT7WA Brimar NOS square black plates 1975 (13.4/13.6ma)
(!!!!) (BEST Holland Pair) ECC88=6DJ8 Philips Holland NOS 1972-1974 (13.4/12.4ma and 13.8/12.4ma)
(!!!!) (Best Overall Pair) 6550 Tungsol gray plates NOS 1975 (139ma and 140.5ma)
(!!!!) (Best Overall Single) 6DJ8=ECC88 Philips by Sylvania NOS 1987 (15.0/15.2ma) 1-2% section balance
(!!!!) (Best Overall Single) 6DJ8=ECC88 Philips by Sylvania NOS 1987 (20/23.6ma) (highest mA and Gm)
(!!!!) (Best Pair) 6550 Tungsol gray plates NOS 1975 (128ma and 129ma)
(!!!!) (Best Pair) 6550 Tungsol gray plates NOS 1975 (130ma and 131ma)
(!!!!) (Best Value Single) 12AU7=ECC82 Mullard UK ribbed plates like new 1965 (10/12.8ma) (smooth rich sound)
(!!!!) (BEST XF4 Pair) EL34 Philips Mullard NOS XF4 1979 (91ma and 94ma)
(!!!!) (Recommended Pair) 311B Western Electric NOS 1973 and 1975 (35.2ma and 36.4ma)
(!!!!) (Recommended Single) 5692 RCA RED BASE black plates used/good 1953 (7/8ma) (Schiit Saga+)
(!!!!) (Recommended Single) PCC88=7DJ8 Philips by Mullard UK NOS 1975 (12.2/12.6ma)
(!!!!) (Recommended XF4 Pair) EL34 Mullard XF4 branded GE NOS and Philips used/like new 1975-1977 (99ma and 106ma)