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(!!!!!) (Best Single 1959) ECC83=12AX7 Telefunken Germany <> bottom ribbed plates NOS 1959 (1.1/1.0ma and Gm=1700/1600) 1-3% section balance
(!!!!!) (Best Single #3) ECC83=12AX7 Telefunken Germany ribbed plates used/tests like new 1953-1955 (1.3/1.1ma and Gm=1700/1600) 1-5% section balance
(!!) (Single) 6SN7GTB RCA NOS 1958 tilted glass (8.8/9.2ma) (Gm the same)
(!!!!) (Best Single) 6SN7GTB RCA branded GE NOS 1970 (9.0/9.2ma)
(!!!!) (Best Single #3) 6SN7GTB RCA branded Wards Super Airline NOS 1959 (9.0/9.2ma)
(!!!!) (Best Single #2) 6SN7GTB RCA NOS 1961 (9.6/10ma) (same Gm)
(!!!!) (Best Single #4) 6SN7GTB RCA NOS 1964 (9.2/8.0ma)
(!!!!) (Single) 6SN7GT RCA NOS 1954 (7.8/7.6ma)
(!!!!) (Best Value Single) 6SN7GTB RCA NOS 1964 (8.4/7.2ma)
(!!!!) (Best Single #1) 2C51=5670 Sylvania NOS 1970's (9.2/9.0ma) 1-3% section balance
(!) (Pair) 12AU6 RCA NOS 1973 (10.6ma and 10.0ma)
(!) (Pair) 12AU6 RCA NOS 1973 (9.2ma and 9.2ma) 1-2% matched
(!!!) (Recommended Pair) 12AT7 GE gray plate NOS 1961 (12.0/13.4ma and 13.2/12.5ma)
(!!) (Single) 201A=UV-201-A Supertron Hoboken New Jersey NOS 1926 (2.5ma) (good Gm)
(!!!!) (Best Single #1) ECC802S=12AU7 Telefunken Germany <> bottom NOS 1960 good printing (11.0ma and 10.6ma) (Same Gm)
6A8G Cunningham NOS 1948 (52/29)
(!) 6BE6 Sylvania NOS (1.4ma)
(!!) 7247=12DW7 GE branded Tungsol tall gray ribbed plates used/good 1960 era (1.0ma and 7.8ma)
(!!) (Single) ECF82=6U8 Toshiba Japan branded Telefunken NOS 1964 (14.2ma triode and 9ma pentode)
(!!) (Single) ECF82=6U8 Toshiba Japan branded Telefunken NOS 1964 (17ma triode and 8.2ma pentode)
