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(!) (PAIR) 7189 Mullard Great Britain rebranded 7189A Realistic Lifetime 7189A used/good 1960's gold pins (37.4ma and 40.5ma)
(!) (PAIR) 7189A GE NOS 1960's (47.2ma and 46.5ma)
(!) (Recommended Single) 6BQ5 Tungsol NOS 1960 era (39ma)
(!) (Recommended Sylvania Pair) 6BQ5 Sylvania black plate 1960's and 1973 (68ma and 62.5ma) (recommended for FIXED-BIAS amp only due to high current)
(!) (SINGLE) 6BQ5 Sylvania black plate NOS 1970's (46ma)
(!) (SINGLE) 6BQ5=EL84 Heath Mullard Great Britain used/good 1959 (40ma)
(!) (Single) 7189 Mullard UK used/strong 1962 (43.8ma)
(!) 6BQ5 GE used/good 1960's (35.5ma)
(Best Single) 6BQ5 Raytheon NOS 1960's (62ma)
(Best Value Single) 6BQ5 Hitachi Japan used/tests like new 1960's (44.5ma)
(Best Value) 6BQ5 GE branded Westinghouse NOS 1960's (38.5ma)
(Best Value) 6BQ5 GE NOS/80-85% 1959 (36ma)
(READ REVIEW) 7189 Westinghouse gray plate NOS 1960's (46ma)
6BQ5 GE NOS 1960's (40ma)
6BQ5 GE NOS 1973 (71ma) (recommended for FIXED-BIAS amp only due to high current)
6BQ5 GE NOS 1977 (58.5ma)
6BQ5 GE Zenith NOS 1976 (46.2ma)
6BQ5 Lindal Japan like new 1970's (50ma)
6BQ5 Lindal Japan NOS 1970's (42ma)
6BQ5 Lindal Japan NOS 1978 (59.5ma)
