(!!!!) (Read Review) 12AX7A=ECC83 Matsushita Japan NOS rebranded Raytheon NOS 1970 era (Gm=1800/1800 and 1.5/1.3ma) (similar to Mullard)
(!!!) (BEST PAIR #2) 7247=12DW7 CBS gray ribbed plates NOS 1960 (0.9/9ma and 1.0/9ma)
(!!!) (BEST PAIR) 7247=12DW7 CBS gray ribbed plates NOS 1960 (1.0/10ma and 1.1/9.5ma)
(!!) 12AU7 Hitachi JAPAN branded IEC Mullard ribbed plates 1969 (12.8/13.4ma) (Same Gm)
(!) (Best Single) 7247=12DW7 Amperex Globe Logo by Matsushita Japan NOS 1967 similar sound to Mullard (1.5ma and 11.6ma) (High mA and Gm)
(!) (Good Value) 12AX7WXT Sovtek NOS 1990's (Gm=1500/1400 and 0.9/0.8ma)
(!) (MULLARD CLONE) 12AX7=ECC83 Matsushita Japan NOS 1960's (Gm=1600/1500 and 1.2/1.0ma) (similar to Mullard)
(!) (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)
(slightly microphonic tube) 12AU7 RCA tall black ribbed plates "D" getter halo tests like new 1950's (9.4/10.0ma)
(slightly microphonic tube) JRC-12AU7 RCA tall black ribbed plates "D" getter halo tests like new 1950's (9.6/10.4ma)
50C-A10 Matsushita (sold out)
6BM8 Philips Miniwatt by Valvo Germany used 1961
6DA5=EM81 Matsushita Japan NOS 1960's (3 in stock)
ECH81=6AJ8 Valvo Germany like new 1960 (6.3ma and 10.6ma)
EL34 Matsushita Japan branded Amperex NOS 1975 (73ma)
EM81 Teonex Russian made NOS 1960's (3 in stock)
