(!) (MULLARD CLONE) 12AX7=ECC83 Matsushita Japan NOS 1960's (Gm=1600/1500 and 1.2/1.0ma) (similar to Mullard)
(!) (MULLARD CLONE) 12AX7=ECC83 Matsushita Japan ribbed plates used/good 1960's (Gm=1450/1400 and 1.0/0.9ma) (similar to Mullard)
(!) (PAIR) 12HG7=12GN7A Sylvania branded RCA coated glass NOS (37ma and 40ma)
(!) (PAIR) 12HG7=12GN7A Sylvania branded RCA coated glass NOS (51ma and 52ma)
(!) (READ REVIEW) GZ34 Raytheon Japan by Matsushita NOS similar sound and build to Mullard NOS 1970's (59/40 and 59/40 x 2 tubes)
(!) (Recommended Pair) EL36 Haltron Japan clear top NOS 1960's (86ma and 93ma)
(!) (slightly microphonic single) 12AU7 Hitachi JAPAN branded IEC Mullard NOS ribbed plates 1968 (9.4/11ma)
(!) 12AU7A Hitachi JAPAN branded Realistic Lifetime NOS ribbed plates 1960 era (9.2/12.2ma)
(!) 12AX7A FANON by HITACHI JAPAN used (0.9/0.9ma
(!) 12BH7A Toshiba rebranded "Bell and Howell Schools" like new 1960's (9/10.4ma)
(!) 12HG7=12GN7A GE USA NOS (52ma and 56ma)
(!) 12HG7=12GN7A GE USA NOS (62ma and 66ma)
(!) 12HG7=12GN7A GE USA NOS (71ma and 68ma)
(Best Value Single) 6BQ5 Hitachi Japan used/tests like new 1960's (44.5ma)
(BEST VALUE) 6LQ6 Sylvania branded RCA low hours/like new 1970 era (104ma)
(PAIR) 6AX4GT RCA used/very good (54/40 and 54/40)
(PAIR) 6CJ3=6DW4B Raytheon Japan NOS 1960's (85-85/60)
(PAIR) 6CJ3=6DW4B Raytheon Japan NOS 1960's (85-86/60)
(PAIR) 6DW4B Raytheon Japan NOS 1960's (82-82/60)
(slightly microphonic tube) 12AU7 RCA tall black ribbed plates "D" getter halo tests like new 1950's (9.4/10.0ma)
