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(!!) 7247=12DW7 GE branded Tungsol tall gray ribbed plates NOS 1960's (1.0ma and 10.4ma)
(!!) (Recommended Pair) 6AC7=VT-112 RCA 1941-1942 used/very good (13/15.3ma) (close Gm)
(!!!!!) (Recommended Pair) 6350 Sylvania black plates NOS 1960 era "D=SQUARE" getter (9.4/8.2ma and 10.2/8.4ma)
(!!!!) (Best Pair #1) 6BX7GT Sylvania triple mica "O" getter NOS 1960 era (74/66.5ma and 78.5/68.5ma) (same Gm)
6D6 Raytheon used/good 1930's (62/40)
6K7G Sylvania tests like new 1940's (10.4ma)
(!!!!) (Single) 6U8A GE NOS 1977 (15ma/9.4ma)
(!!!) (Pair) JTL-6AK5 Tungsol gray plate "D" getter used/good 1952-1954 (5.1ma/5.6ma) (same Gm)
(!!!!) (Recommended Pair) 7N7 Sylvania branded GE chrome top NOS 1954-1956 (7.4/7.0ma and 7.4/7.2ma) 1-2% matched
12AT6 Raytheon Taiwan NOS 1970's (80/60 and 80/60)
(!!) 6EA7 Sylvania NOS 1960 era (2.1/43ma)
(READ REVIEW) 6SN7GTB Sylvania chrome top black plates 1956-1958 used/good (7.0/6.8ma and 6.6/6.6ma)
7A7 RCA NOS (6 in stock)
(!) 12SN7GTA GE NOS 1958 (9.0/7.5ma) (same Gm)
12BA6 Sylvania NOS 1960's (11ma)
(!!!) (Best Single) 12AT7 Brimar UK branded Knight by Mullard black plates "O" getter NOS 1966 (9.2/10.2ma)
(BEST SINGLE) 6SQ7GT RCA NOS 1951 - 1 small stress crack in metal base (1.1ma and Gm=1300)
(!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS "O" getter halo 1960 era (9.8/9.6ma)
12BY7A Motorola by Sylvania NOS 1960's (21ma)
(!!!) (READ REVIEW) 6922 US Navy Amperex and Amperex branded RCA USA NOS 1963-1964 (18.8/17.6ma and 18.5/20.2ma) (close Gm matching) (Audio Research, Nova, CAT, CJ, Lab 12)
