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(!!!) (Single) JAN-CHS-5Y3WGTA Sylvania NOS 1960 (49/40 and 56/40)
(!!!) (Slightly microphonic Single) 12BH7A CBS Oval Black Plates "U" getter NOS 1960 era (8.4/9.0ma)
(!!!) 12BH7A GE gray oval plates NOS "o" getter 1964 (11.4/10.2ma) (strong Gm)
(!!!) 6SN7GTB Westinghouse black plates copper grid posts "D" getter 1950's (7.2/8.4ma)
(!!) (Best Value Single) ECL82 EI Yugo branded PAN Germany in PAN box NOS 1974 (2.3ma and 42ma)
(!!) (Good Value) 12AX7 Siemens Halske Germany rebranded "BOGEN" used/good 1960 (161 Series) (Gm=1400/1500 and 0.8/0.9ma)
(!!) (Recommended Pair) 6CB5A Sylvania branded Dumont NOS 1960's (58ma and 60ma)
(!!) (Recommended Pair) 6CB5A Sylvania branded Dumont NOS 1960's (82.5ma and 85ma)
(!!) (Recommended Pair) 6CB5A Sylvania branded Dumont NOS 1964-1966 (65ma and 66ma)
(!!) (Recommended Pair) 80 GE GT-shape NOS 1960 (56/40 and 62/40 x 2 tubes)
(!!) (Recommended Single) 12AT7=ECC81 Mullard shield logo NOS 1970 (8.0/8.4ma)
(!!) (Recommended Single) 5Y3GT Hytron NOS 1951 (56/40 and 60/40)
(!!) (Single) 12BH7 GE Delco gray oval plates "U" getter NOS 1950's (7ma/8ma) (Quicksilver, Wells, Doshi, McIntosh)
(!!) (SINGLE) 6BM8=ECL82 Valvo Holland used/good 1960 (1.9ma/34ma)
(!!) (Single) 6SN7GTB RCA NOS 1958 tilted glass (8.8/9.2ma) (Gm the same)
(!!) (SINGLE) 6SN7GTB Westinghouse Rad-Tel Tube Co. gray plates "O" getter halo NOS 1964 (8.4/7.4ma)
(!!) 12AX7 Baldwin Sylvania "D" getter used/tests like new 1959 (1.9/1.9ma) 1% section balance
(!!) 5751 Sylvania misbranded 12AX7WA NOS 1960's (1.9/1.9ma)
(!!) 5751W1 Sylvania triple mica "O" getter halo used/good early 1960's misbranded 12AX7WA (1.8/2.0ma)
(!!) 5R4GYA GE Hewlett Packard brown base "D" getter halo NOS 1959 (51/40 and 52/40)
