6201=12AT7WA RCA Black Plates "o" getter halo used/like new 1961 (8.6/7.8ma)
12DT8 RCA black plates NOS 1970 (23.0/24.4ma) (highest Ma and Gm)
12DT8 RCA gray plates NOS 1970's (12.2/16.4ma)
12DT8 RCA gray plates NOS 1970's (12.6/14.0ma)
(!) (Best Value) 12AT7WA Raytheon black plates - triple mica - O getter halo 1965 era like new (8.5/9.2ma)
(!) (Best Value Single) ECC81=12AT7 Siemens Halske Germany "D" getter 1960 era used/good (8.8/7.5ma)
(!!!) (Recommended Single) 12AT7 Tungsol rebranded AKRAD "U" getter NOS 1956 (6.2/6.6ma)
(!!) (BEST VALUE) 12AT7 Telefunken Germany used/good 1965 (9.2ma/8.4ma)
6201=12AT7 GE "5 STAR" used/good triple mica "U" getter halo, copper grid posts, gray plates, 1957 (6.2/7.8ma)
(!!) (Recommended Single) 6201=12AT7WA GE "5 STAR" NOS 1970 (8.0/9.2ma)
6679 (see 12AT7)
(!!!!) (Best RCA Single 1964) 6201=12AT7WA RCA black plates NOS 1964 (9.8/7.4ma) (best tone)
(!!!) (Best Value Pair) JAN-12AT7WC GE gray plates NOS 1970 (7.0/7.6ma and 7.0/8.2ma)
(!!!) 12AT7WB Raytheon NOS black plates triple mica used/good 1960's (7.8/8.4ma)
(!!!) (Best Value Pair) 12AT7WB=6201 GE NOS 1965-1969 (6.0/7.4ma and 6.0/7.2ma)
(!!) (SINGLE) 12AT7 US Brands used/good
(!!) (Good Value) 12AT7 Telefunken Diamond Bottom used/good 1960's (8.2ma/10.4ma)
(!!!) (Best Value Single) 6201=12AT7 GE Hewlett Packard NOS 1968 (8.2/9.6ma)
(!!!!) (Best Overall Single) CV4024=12AT7WA Brimar NOS square black plates 1966 (11.2./11.4ma)
(Best 12AT7 Value) JAN-12AT7WC Philips by Sylvania black plates NOS 1981-1984 (3 in stock)
