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(!!!!) (BEST SINGLE #2) 2C51=396A=5670 GE NOS "D" getter gray plates 1960 era rebranded National 1970's (8/7ma)
(PAIR) 6ER5 RCA NOS 1960's - 1970's (9.5ma and 9.2ma)
(!) 6922=E88CC Philips Holland SQ gold pins used/75% 1973 (8.8/8.5ma) (Same Gm)
(!!!) (Best Value) 7025 RCA gray pinched plates used/good 1961 era (Gm=1300/1400 and 0.6/0.8mA) (recommended for guitar amp)
(!!) (Best Single) 12BH7A Westinghouse Canada ribbed plates NOS 1967 (12.2/14.2ma)
(!!!!!) (Best Single #1) EF806S=EF86 Telefunken Germany <> bottom NOS 1965 (3.7mA and Gm=2300) (Neumann U67, Shindo, Lawson)
(!!!!!) (Best Overall Pair #2) EF806S=EF86 Telefunken Germany <> bottom NOS 1965 same date codes (4.1mA and 4.2ma) (Close Gm) (Neumann U67, Shindo, Lawson)
(!!!!!) (Best Single #1) 12BH7 Super Radiotron Australia gray ribbed plates NOS 1960's (10.8/8.9ma) (similar sound to RCA) (McIntosh, VTL, Manley, Quicksilver)
(!!!!) (Best Pair #2) 7247=12DW7 Mullard UK NOS rebranded RCA 1972 (1.5/11.5ma and 1.7/11.4ma) 1-3% matched
(!!!!) (Best Pair #3) 7247=12DW7 Mullard UK NOS rebranded RCA 1972 (1.0/11.4ma and 0.9/10.8ma) 1-3% matched
(!!!!) (Best Pair) JAN-CHS-6SL7WGT Sylvania brown base short round black plates "D" getter NOS 1955 (2.1/2.5ma and 2.1/2.4ma) 1-3% matched
(!) (Best Pair #2) 6SF7 Raytheon NOS 1955 (12.8ma and 13.4ma)
(!!) (Best Single #3) EC86 Telefunken Germany <> bottom NOS 1960's no printing (12.4ma) (Copy)
12SF7 Ken Rad NOS 1946 (10.8ma)
(!!!) (Best Single #2) 7247=12DW7 Mullard UK rebranded RCA NOS 1969 (1.2ma and 9.2ma) (Copy)
12SF7 Ken Rad used/good 1946 (10.6ma)
(!) (BEST PAIR #2) JAN-5725W=6AS6 Philips by Sylvania black plate NOS 1982 (5.2ma and 5.2ma) 1% matched
(!!) (BEST PAIR #1) JAN-5725W=6AS6 Philips by Sylvania black plate NOS 1982 (4.6ma and 4.6ma) (same Gm) 1-2% matched
(!!) (Best Single) 6SL7GT GE short round chrome plates NOS 1970's (2.9/2.5ma)
(!!!!) (BEST SINGLE #2) EF804S Telefunken Germany <> bottom NOS 1961 (3.6ma) (Highest mA and Gm) (V72 / V76 preamp)
