(!!!!) (Best Pair) 7189 Sylvania black plates NOS 1970 era (42ma and 46ma)
(!!!!) (BEST SIEMENS PAIR) EL84 Siemens Halske Germany NOS 1969 (47.5ma and 50.4ma)
(!!!!) (BEST SIEMENS PAIR) EL84 Siemens Halske Germany NOS 1969 (57.5ma and 60ma)
(!!!!) (Best Siemens Pair) EL84 Siemens Halske Germany used/test like new 1971 (48.2ma and 48.5ma) (High Gm)
(!!!!) (Best Sylvania Pair) 6BQ5 Sylvania black plate NOS 1970's (56.0ma and 58.0ma)
(!!!!) (Good Value Pair) 6BQ5 GE NOS 1959-1960's (43ma and 46ma)
(!!!!) (Recommended GE Pair) 6BQ5 GE NOS 1966-1982 same build (55.6ma and 60ma)
(!!!!) (Recommended Pair) 6BQ5 RCA NOS 1960's (50.5ma and 48.2ma)
(!!!!) (Recommended Pair) 6BQ5 Sylvania black plate NOS 1970 era (63ma and 68ma)
(!!!!) (Recommended Pair) EL84 Telefunken Germany <> bottom NOS 1963-1966 (68ma and 69.5ma) (recommended for FIXED-BIAS amp only due to high current)
(!!!) (Best Pair from 1959) EL84 Wien Austria same build and sound as Holland 1959 (38ma and 39ma)
(!!!) (Best Pair) 6BQ5 RCA NOS 1962-1966 (47ma and 48ma)
(!!!) (Best RCA Pair) 6BQ5 RCA NOS 1960's - 1970 (55ma and 58.5ma)
(!!!) (Best RCA Single) 7189 RCA NOS 1960's (51ma)
(!!!) (Best Siemens Pair) EL84 Siemens Halske Germany 1966-1969 (40ma and 42.5ma)
(!!!) (Best Single) EL84 Brimar England NOS 1962 (58.2ma)
(!!!) (Best Single) EL84 IEC Mullard NOS "D" getter made in Wien, Austria 1958 (47ma) (same sound as Philips Holland)
(!!!) (BEST VALUE PAIR) EL84 Raytheon JAPAN NOS 1960's (45ma and 48.5ma)
(!!!) (Best Value Single) EL84 Mullard England used/good 1963 (45.8ma)
(!!!) (Good Value Pair) EL84 Amperex Bugle Boy Austria "D" getter used/good 1958-1959 (33.8ma and 35ma)
