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3C4=DL96 Sonotone England NOS 1960's (5 in stock)
3C6=XXB NOS (6 in stock)
3Q4 US Brands NOS (8 in stock)
3S4 RCA Fordom used/good 1950's (100/60)
3S4 Philco and Raytheon NOS same build 1940's - 1951 (1 Pair)
3V4 GE Motorola used/strong 1960 era (92/60)
12SN7GT Raytheon used/good 1949 (6.2/6.2ma)
(!!!) (Single) 12BH7A CBS Oval Black Plates "O" getter used/good 1960 (7.3/9.6ma)
(!!!!) (Single) 6CG7 Tungsol NOS 1960 era black shield between plates - pin #3 slightly shorter (8.6ma/10ma)
(!!!) (Best Single) 7025 Sylvania NOS 1970's (Gm=2200/2300 and 1.4/1.5ma)
(!!!) (Recommended Pair) 12AX7 Triotron by Philips Holland NOS and Valvo Holland like new 1966-1968 (1.7/1.5ma and 1.5/1.5ma)
(!!) (Recommended Single) JAN-12AX7WA Sylvania NOS 1974 (Gm=2100/2300 and 1.7/1.9ma)
(!!!!) (Best Pair #3) 5670W GE NOS 1986 (7.8/8.8ma and 7.6/8.2ma) 1-5% matched
(!!) (BEST OVERALL SINGLE) EC86 Telefunken Germany <> bottom gold pins NOS 1961 (15.5ma) (Highest mA and Gm)
(READ REVIEW) 6SN7GTB GE NOS 1966-1968 (7.4/6.2ma and 7.6/6.8ma) (same Gm)
EBF89=6DC8 Valvo Holland used/good 1956 (7.5ma)
(!!) (Best Single) EC92=6AB4 Siemens Halske Germany NOS 1971 (10.2ma)
(!!!!) (Recommended Single) 12AT7WA Mullard NOS wide ribbed plates like CV4024 Mullard 1978 (7.0/7.8ma)
(!!!) (Single) 12AU7=ECC82 Telefunken Germany <> bottom smooth plates NOS 1968 (14.5ma/8.6ma)
(!!!!) (Good Value Single) 6SN7GTB Westinghouse USA black plates "D" getter halo like new 1960 (6.8/7ma)