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(!!!) (Good Value Pair) 6350 Sylvania black ribbed plates "U" getter used/good 1957 (9.6/9.3ma and 9.5/9.8ma) 1-3% matched (same Gm)
(!!!) (Best Value Single 1965) 12AX7=ECC83 Siemens Germany ribbed plates used/good (0.9/0.8ma and Gm=1500/1400)
(!!!) (Best Single 1953) 12AX7 GE gray ribbed plates "D" getter 1953 like new (Gm=1600/1600 and 1.1/1.0ma) (1st version)
(!!) (Recommended Pair) 12AZ7=12AZ7A GE branded Admiral/Westinghouse black plates NOS 1960 (9.0/9.4ma and 9.2/8.0ma) (McIntosh MC275)
(!!!) (Best Value Single) 12AX7=ECC83 SIEMENS HALSKE GERMANY used/good 1966 (0.8/0.9ma)
(!!) (Best Pair) 12SL7GT GE NOS 1973 (2.9/2.9ma and 2.7/2.6ma)
(!) 6SK7GT Philco by Sylvania chrome top 1952 (10ma)
6SA7GT RCA NOS 1940's (95/60)
(!!!) (BEST PAIR) 7247=12DW7 CBS gray ribbed plates NOS 1960 (0.9/8.8ma and 0.9/8.6ma) 1-3% matched
(!) (Good Value) 12AX7WXT Sovtek NOS 1990's (Gm=1500/1400 and 0.9/0.8ma)
6BL7GT Sylvania used/good 1954 (39.2/40.4ma)
12A8GT Nat. Union used/good 1940's (89/60)
(!!) 6BL7GT GE "D" getter NOS 1957 (36/37.4ma)
(!!) (Good Value) 12AT7=ECC81 Siemens Halske Germany used/strong 1964 (8.2ma/12.2ma)
58 National Union NOS 1950 era (58/36)
58 RCA NOS 1940's (68/36)
(!!) (Best Value Single) 12AT7WA Raytheon NOS black plates - triple mica - O getter halo 1975 era like new (8/12.6ma)
(!!!) (Best Single) JAN-12AT7WA Raytheon NOS black plates - triple mica - O getter halo 1968 (13.8/13.4ma)
58 US Brands used/good (6 in stock)
(!!) 12BH7A RCA used/very good 1960's (9.8/11.6ma)
