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(!) (slightly microphonic single) 12AU7 Hitachi JAPAN branded IEC Mullard NOS ribbed plates 1968 (9.4/11ma)
(!) (slightly microphonic single) CV4004=12AX7 Mullard NOS 1981 (1.3/2.1ma)
(!) (slightly microphonic) 6072 GE branded RCA triple mica black plates "O" getter halo 1960 used/good (2.0/2.0ma)
(!) (slightly microphonic) 6SL7GT=VT-229 RCA round black plates like new 1942-1945 era (2.4/2.6ma)
(!) (slightly microphonic) JAN-CRC-6SL7GT RCA NOS black plates 1951 tilted glass (2.0/2.2ma)
(!) (Slightly microphonic) JG-5814A GE NOS triple mica "U" getter halo 1956 (10.2/10.4ma) 1-2% section balance (high Ma and Gm)
(!) (slightly micrphinic single) 12AT7 RCA black plates NOS D getter halo 1959 (12.2/10ma)
(!) (sold out) 8416 Amperex PQ USA NOS 1965-1967
(!) (sold out) F2a Siemens NOS 1960's (112ma) Tested on Amplitrex (sold out)
(!) (USED PAIR 1950's) 6BA6 RCA black plates used/test like new 1950's (10.6ma and 10.8ma)
(!) (~ Best AZ50 Pair ~) AZ50 Miniwatt Dario France NOS 1954 (rare pair)
(!) (~ 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)
(!) 0B2=108C1 Valvo Germany like new in white boxes 1960 era (neon gas)
(!) 108C1=0B2 Siemens made in France 1970 (argon gas)
(!) 12AT7 East Germany branded "M" Mühlhausen NOS 1970's (8.4/9.0ma)
(!) 12AT7 Mullard Heath "D" getter used/good 1959 (6.4/7.6ma)
(!) 12AT7 Mullard Heath "D" getter used/like new 1960 (8.0/9.6ma)
