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(!!) (Single 1962) EL84 Mullard UK NOS (rX1-B2C3=1962) (39.6ma)
(!!) 6BQ5 Sylvania gray plate NOS 1960's (63.5ma)
(!!) 6BQ5 Sylvania gray plate NOS 1970's (44ma)
(!) (Best Single) EL84 Siemens Halske Germany NOS 1972 (54.5ma)
(!) (BEST VALUE PAIR) EL84 Brimar England NOS 1962 (67ma and 66ma) (recommended for FIXED-BIAS amp only due to high current)
(!) (Good Value) 6BQ5 Sylvania gray plate used/very good 1960's faded printing (47.5ma)
(!) (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)
(READ REVIEW) 7189 Westinghouse gray plate NOS 1960's (46ma)
6BQ5 GE NOS 1960's (40ma)
6BQ5 GE NOS 1960's (47ma)
6BQ5 GE NOS 1960's (70ma) (recommended for FIXED-BIAS amp only due to high current)
6BQ5 GE NOS 1971 (43.5ma)
6BQ5 GE NOS 1977 (58.5ma)
