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(!!) (Best Value Single 1961) 5687WA Tungsol bronze plates "O" getter halo used/very good 1961 (33.4/34.8ma)
(!!) (BEST VALUE) 12AY7 GE NOS 1966 (2.3/1.9ma)
(!!) (Good Value Single) 12AZ7 Tungsol black plates "U" getter halo NOS 1950's (7.5ma/7.5ma)
(!!) (Good Value Single) 5687 Tungsol Hewlett Packard bronze plates "O" getter like new 1960 (32.5/33.7ma)
(!!) (GOOD VALUE SINGLE) 5687 Tungsol rebranded IBM bronze plates "U" getter used/good 1959 (29/36ma)
(!!) (PAIR) 7AF7 Sylvania branded RCA and GE NOS black round plates NOS 1956-1958 (7.0/7.6ma and 8.2/7.8ma) (close Gm matching)
(!!) (Recommended from 1958) JHS-12AT7WA Sylvania triple mica "D" getter NOS 1958 (11.6/15ma) (phase inverter, reverb)
(!!) (Recommended from 1964) 12AT7WA Sylvania NOS 1964 (7.0/8.4ma)
(!!) (Recommended Single 1961) JLRV-12AT7WA=6201 GE Canada gray plates triple mica "U" getter NOS 1961 (9/12ma)
(!!) (Recommended Single) JG-5751 GE gray plates double mica "O" getter NOS 1965 (2.1/2.1ma)
(!!) (SINGLE) 5687 Tungsol rebranded IBM bronze plates "U" getter used/very good late 1950's (32.5/39ma)
(!!) (SINGLE) 6SN7GTB Westinghouse Rad-Tel Tube Co. gray plates "O" getter halo NOS 1964 (8.4/7.4ma)
(!!) (Single) JAN-5670W GE NOS 1978 (9.8/9.0ma)
(!!) (Single) JAN-5670W GE used/good 1970's (6.8/6.0ma)
(!!) (Single) JAN-5755 Raytheon Black Plates NOS 1967 (1.6/2.0ma)
(!!) (slightly microphonic) B309=12AT7 GEC UK black plates "D" getter NOS 1950's (9.6/10.8ma)
(!!) (slightly microphonic) JHS-12AT7 Sylvania black plate "D" getter 1953 (11.2ma/11.2ma) 1% section balance
(!!) (~ Best Value ~) 12AT7 Toshiba JAPAN black plates rebranded CM Curtis Mathes NOS 1960's copper grid posts (9.0/9.2ma)
(!!) 12AT7 Brimar black plates NOS/70-75% 1955 (5.6/5.8ma)
(!!) 12AT7 Brimar England black plates "U" getter used/good 1950's (6.0/6.4ma)
