(!!!!) (Recommended Pair) 403B=6AK5 Western Electric NOS "D" getter 1969 (7.3/7.0ma)
(!!!!) (Recommended Pair) 6SN7GTB RCA NOS 1964-1970 (7.2/8.2ma and 7.0/7.4ma)
(!!!!) (Recommended Pair) 6V6GTA GE NOS 1960's - 1970 (38ma and 40ma) (Fender, Two Rock, Victoria)
(!!!!) (Recommended Pair) JAN-6189W=12AU7WA Sylvania NOS 1973-1974 (9.2/9.6ma and 9.8/8.6ma)
(!!!!) (Recommended Single) 12AU7A RCA clear top NOS 1969 (10.6/12.0ma)
(!!!!) (Recommended Single) 12AY7 GE NOS 1960's (2.2/2.5ma)
(!!!!) (Recommended Single) GZ34 Mullard UK NOS 1975 (59/40 and 60/40)
(!!!!) (Recommended Single) GZ34 Mullard UK NOS 1975 (60/40 and 60/40)
(!!!!) (Recommended XF2 Pair) EL34 Mullard XF2 NOS (1 tube) double halo "O-O" (1 tube) single halo "O" 1967-1968 (90.5ma and 92.8ma)
(!!!) (Best Overall Single) E90F=6BH6 Philips SQ Holland NOS 1968 (8.4ma)
(!!!) (BEST PAIR) JG-6189=12AU7WA GE double mica NOS 1963-1964 (10.2/12ma and 10.2/11ma)
(!!!) (Best RCA Pair) 5V4GA RCA gray plates NOS 1963-1965 slightly tilted glass (60-62/40 and 59-60/40)
(!!!) (Best Single 1963) JG-5751 GE double mica gray plates NOS 1963 (2.7/2.7ma) (1-2% section balance)
(!!!) (Best Single) 5V4GA RCA black plates NOS 1958 slightly tilted glass (62/40 and 62/40)
(!!!) (Best Single) 5V4GA RCA gray plates NOS 1966 (58/40 and 58/40)
(!!!) (Best Single) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10ma)
(!!!) (BEST VALUE PAIR) EL84 Raytheon JAPAN NOS 1960's (45ma and 48.5ma)
(!!!) (Best Value Single) CV4003=M8136=12AU7 Mullard UK NOS large "O" getter halo 1962 dirt was over entire tube (10.6/11.0ma)
(!!!) (Best Value used) 12AU7=ECC82 Mullard UK branded Philips Miniwatt ribbed plates used/good 1962 (8.2/10.4ma)
(!!!) (Good Value Single) 12AY7 GE "D" getter NOS 1955 (2.2/1.9ma)
