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(!!!) (Best Pair) 5U4GB Sylvania NOS 1960's (59-62/40 and 60-62/40)
(!!!) (Best Single #1) 6SN7GTB Silvertone by Sylvania NOS 1960 era (10.4ma and 10.8ma) 1-2% section balance (Same Gm)
(!!!) (Best Single #2) 5Y3GT RCA NOS 1970 (56/40 and 60/40)
(!!!) (Best Single #3) 6SN7GTB Sylvania NOS 1960 era (8.6ma and 7.6ma)
(!!!) (Best Single) 6350 RCA black plates NOS "O" getter NOS 1960's (16.0/16.2ma) (Highest Ma and Gm)
(!!!) (BEST SOUNDING PAIR) 5Y3GT RCA Motorola NOS 1970 (56-60/40 x 2 tubes)
(!!!) (Best Sylvania Single) 8417 Sylvania NOS branded Westinghouse NOS 1973 (113mA)
(!!!) (BEST VALUE PAIR #1) 6SN7GTB RCA coin-base 1970-1975 (10.4/9.6ma and 9.4/10.6ma)
(!!!) (Best Value Pair) 5Y3GT Philips Holland NOS 1960's (60-68/40 and 60-69/40)
(!!!) (BEST VALUE PAIR) 5Y3GT RCA Motorola NOS 1970 (55-65/40 and 55-63/40) (best sound)
(!!!) (Best Value Single) ECC83=12AX7 Siemens Halske Germany used/good 1960's faded date code (1.3/0.9ma and Gm=1700/1500)
(!!!) (Best Value) 5U4GB RCA low hours/like new 1970 (55-55/40) 1% section balance
(!!!) (Best Value) 5U4GB RCA used/tests like new 1955 (60-62/40) 1-3% section balance
(!!!) (Best Value) EZ80=6V4 Tronal by Tesla NOS 1970's (62/40 and 62/40) 1% section balance
(!!!) (Good Value Single) 12AX7A RCA Magnavox ribbed plates used/good 1961 (Gm=1500/1900 and 0.8/1.3ma)
(!!!) (Recommended Pair) 12AT7 RCA gray plates NOS 1971 (7.2/8.0ma and 7.6/6.6ma) (close Gm)
(!!!) (Recommended Pair) 5Y3GT Philips Holland NOS 1960's (61-68/40 and 60-68/40)
(!!!) (Recommended Single) 6EU7 RCA NOS 1967 (50/32 and 46/32)
(!!!) (Recommended Single) 6EU7 RCA NOS 1971 (53/32 and 45/32)
(!!!) (Recommended Single) EZ80 Pope France NOS "O" getter halo 1970 (62/40 and 62/40) 1% section balance
