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(!!!!!) (Best Overall Single) 12AU7=ECC82 Mullard BVA UK NOS 1972 (11.8/12.0ma) (Same Gm) 1-2% section balance
(!!!!) (Best Pair #1) 6B4G Raytheon NOS 1940's separate plates, 1 branded Philco (90ma and 91.5ma)
(!!!!) (Best Pair #3) 6B4G Raytheon NOS 1940's - 1 tube branded Tungsol - same build - separate plates (82ma and 83ma)
(!!!!) (Best Pair) 417A Western Electric NOS 1981-1982 (32ma and 31.5ma)
(!!!!) (Best Pair) 417A Western Electric NOS 1981-1982 (33ma and 33.5ma)
(!!!!) (Best Single #1) 5881 Tungsol branded CBS NOS 1961 (88ma)
(!!!!) (Best Single #2) JAN-CRC-6AS7G RCA gray plates NOS 1954 (75ma/63ma)
(!!!!) (Best Single 1956) ECC82=12AU7 Siemens Halske "Long Ribbed Plates" and large/wide "U" getter branded Haltron 1956 (10/9.2ma) (k62 series) (High Gm) (rare)
(!!!!) (Best Single 1958) 6922 Amperex Holland curved "D" getter 1958 NOS (16.2/17.8ma) (same sonics as pinched waist version)
(!!!!) (Best Single) 5V4G Ken Rad black plates NOS 1945 (60/40 and 60/40)
(!!!!) (Best Single) JAN-CRC-6AS7G RCA gray plates NOS 1954 tilted glass (95ma/100ma) (close triode balance)
(!!!!) (Good Value Single 1964) PCC88=7DJ8 Philips Miniwatt Holland "O" getter NOS 1964 (10.5/16.2ma)
(!!!!) (Pair Pair #2) 6B4G Raytheon NOS 1940's - 1 tube branded Tungsol - same build - separate plates (86ma and 83.5ma)
(!!!!) (Recommended Pair 1970's) 417A Western Electric NOS 1973-1977 (27ma and 31.2ma)
(!!!!) (Single) 12AU7=ECC82 Mullard branded Philips NOS 1973 (11.2/12.0ma) (smooth and rich tone)
(!!!!) (Single) PCC88=7DJ8 Philips Holland "O" getter NOS 1968 (11.8/8.8ma)
(!!!!) (Slightly microphonic) ECC83=12AX7 Amperex Bugle Boy Holland "long plates" and "D" getter tests like new 1958 (1.2/1.3ma and Gm=1700/1700) 1-3% section balance
(!!!) (Best Single 1962) JHS-12AX7 Sylvania NOS 1962 (Gm=2600/2500 and 1.8/1.9ma)
(!!!) (Best Single E90F=6BH6 Philips Holland NOS 1963 (10.2ma)
(!!!) (Best Single) 6B4G Raytheon NOS 1940's (92ma)
