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(!!) (Slightly microphonic single) 6SN7GT Brimar UK NOS slightly microphonic 1960 era (6.8/7.8ma)
(!!) (slightly microphonic) B309=12AT7 GEC UK black plates "D" getter NOS 1950's (9.6/10.8ma)
(!!) 12AT7 Brimar black plates NOS/70-75% 1955 (5.6/5.8ma)
(!!) 13D3 Brimar UK black plates tests like new 1962 (6.8ma/7.2ma) (similar to 12AU7)
(!!) CV4024=12AT7WA Brimar NOS square black plates 1968 partially faded printing (7.8/10.4ma)
(!!) CV4024=12AT7WA Brimar NOS square black plates 1975 (9.6/14.4ma)
(!!) CV4024=12AT7WA Brimar NOS square black plates 1976 (7.6/8.2ma)
(!!) CV4024=12AT7WA=12AT7 Brimar UK NOS square black plates 1962 (8.6/13.6ma)
(!) (BEST SINGLE) 6BA6 Brimar England NOS 1960's (10.8ma)
(!) (BEST VALUE PAIR) EL84 Brimar England NOS 1962 (67ma and 66ma) (recommended for FIXED-BIAS amp only due to high current)
(!) (microhonic) 6DJ8 Brimar England rebranded IEC Mullard NOS 1966 (12.4/12.0ma)
(!) (USED PAIR 1950's) 6BA6 RCA black plates used/test like new 1950's (10.6ma and 10.8ma)
(READ REVIEW) 12AX7 BRIMAR England shiney black ribbed plates "D" getter 1955 (rare)
(READ REVIEW) 6A8GT CBS NOS 1952 (42/29)
(slightly microphonic tube) 12AT7 Brimar UK black plates "D" getter halo copper grid posts used/good 1955 era (7.2/8.4ma)
12AU7=ECC82 Brimar branded Tronix tall narrow plates used/good 1960 (6.4/7.2ma)
6A8G Tungsol NOS 1950 era (43/29)
6A8GT Raytheon NOS 1950 era small hairline crack in base (96/60)
6BA6 RCA Mexico NOS 1970 era (12ma)
6BA6 RCA tests like new 1960's (11ma)