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(BEST SINGLE) 6DN7 RCA NOS 1968 (38ma and 10.2ma)
(Best Single) 6DN7 Sylvania NOS 1960's (60ma/8.3ma)
(Best Single) 6KT8 US Brands NOS (7/16) (highest testing single)
(Best Single) 6SF5 GE NOS 1958 (2.1ma) (strong single)
(BEST SINGLE) 6SF5GT Tungsol NOS 1940's (1.1ma Gm=1500)
(Best Single) ECC34 Mullard NOS 1950's (10.1ma/10.2ma)
(Best Value) 6GV8=ECL85 RCA Mexico NOS (2 in stock)
(BEST VALUE) ECC808=6KX8 Telefunken Diamond Bottom <> NOS 1969 faded printing from rubbing inside box (0.8/1.0ma Gm=1350/1500)
(BEST) 14R7 RCA Victor NOS 1940's (98/60)
(Best) 1U4 Tungsol NOS 1953 (1 in stock)
(DISPLAY TUBE) 216A Western Electric used 1920's
(microphonic single) 12AT7 Philips Miniwatt made in Hamburg, Germany by VALVO NOS "D" getter halo 1959 (8.8/10.2ma)
(PAIR) 12BD6 RCA NOS (85-90/60)
(PAIR) 12BD6 Sylvania NOS 1952 (72/60 and 72/60)
(Pair) 6AC7=1852 Ken Rad used/strong 1940's (9.6/10ma)
(PAIR) 6CQ6=EF92 Brimar England used/good 1956 (82/60 and 82/60)
(PAIR) 6CQ6=EF92 Haltron by Mullard England used/good 1956 (88/60 and 85/60)
(READ RERVIEW) 6K11=6Q11 GE branded Westinghouse NOS 1960's (88/80, 91/60, 84/60)
(READ REVIEW - GOOD HUMOR) 5BQ7A RCA branded Raytheon black plates "D" getter faded printing 1950's (14.0/13.6ma)
(READ REVIEW) (BEST VALUE SINGLE) PCC88=7DJ8 RFT East Germany branded Tesla NOS 1980 era (10 in stock)
