(!) (~ Best Value Single ~) 6DJ8 EI YUGO NOS 1977 (13.2/13.6ma)
(!) (~ Best Value ~) JG-12AT7WA=6201 GE gray plates triple mica "U" getter low hours/like new 1958 (8.8/10.6ma)
(!) (~ Recommended Pair ~) 6HQ5 Sylvania branded Raytheon NOS 1970 era same build (13.2/14.6ma)
(!) (~ Recommended Pair ~) 6HQ5 Sylvania NOS 1970 era same build (12.5/13ma)
(!) 12AT7 East Germany branded "M" Mühlhausen NOS 1970's (8.4/9.0ma)
(!) 12AT7 RCA black plates NOS D getter halo 1950's, slightly microphonic (13/16.4ma) (high Ma and Gm)
(!) 12AT7=E81CC RTC Radio Technique France NOS 1971 (7.8/8.0ma)
(!) (slightly microphonic single) 12AU7 Hitachi JAPAN branded IEC Mullard NOS ribbed plates 1968 (9.4/11ma)
(!!) (Best Value Single 1953) 12AU7 Sylvania black plates "D" getter used/strong 1953 no printing (9.6/11.8ma)
(!) 12AU7 Tungsol gray ribbed plates NOS square or "D" getter halo 1954 in white box (8.2/8.6ma)
(!) 12AU7=ECC82 Brimar tall narrow plates used/good 1960 faded printing (7.8/9.6ma)
(!) 12AU7A=ECC82 GE Brimar ribbed plates used/good 1967 (9.5/9.8ma)
(!!!) (Best Value used) 12AU7=ECC82 Mullard UK branded Philips Miniwatt ribbed plates used/good 1962 (8.2/10.4ma)
(!) 12AU7A Hitachi JAPAN branded Realistic Lifetime NOS ribbed plates 1960 era (9.2/12.2ma)
(!!!) (Recommended Single) 12AX7=ECC83 Mullard UK old logo copper grid posts used/good 1963 (.9/1.0ma and Gm=1500/1500)
(!) 12AX7A FANON by HITACHI JAPAN used (0.9/0.9ma
(!) (Best Value) 7025A=12AX7A China branded International Yugo NOS 1990's (1.0/0.9ma and Gm=1700/1600)
(!) (Best Value) 12AX7A China tests like new 1990's (1.1/1.2mA and Gm=1800/1900)
(!) 12BH7A GE gray oval plates "O" getter halo used/good 1964 (7.2ma/8.5ma)
(!) 12BH7A Toshiba rebranded "Bell and Howell Schools" like new 1960's (9/10.4ma)
