(!!!!) (Best Sounding Pair) 5Y3GT RCA Motorola NOS 1960 (56-61/40 and 56-62/40)
(!!!!) (Best Value Pair #1) 12AX7A RCA gray ribbed plates NOS 1967-1973 (best tone) (0.9/0.9ma and 0.9/1.1ma) (Fender)
(!!!!) (Best Value Pair 1960) 12AX7=ECC83 Mullard UK ribbed plates used/good 1960 (161 Series) (0.8/1.0ma and 0.8/1.0ma) 1-2% matched
(!!!!) (Best Value Pair) 6V6GT Sylvania green leaf coated glass NOS/80% 1940's in white boxes (32.5ma and 33ma)
(!!!!) (Best Value Single) 6V6G Haltron UK coated glass NOS 1940's (48.5ma)
(!!!!) (Best Value used) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 (.8/1.2mA Gm=1400/1600)
(!!!!) (Best Value used) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 copper grid posts (.7/.8mA Gm=1400/1500)
(!!!!) (Good Value Pair 1960's) 12AX7A RCA gray ribbed plates NOS 1967 (best tone) (1.0/0.8ma and 1.0/0.8ma) (1-2% matched)
(!!!!) (Good Value Pair) 6V6GTA RCA used/good 1962 and 1970's (30ma and 31.5ma)
(!!!!) (Good Value) JG-12AY7 GE box plates like new 1953 (3.3/2.5ma)
(!!!!) (Recommended Pair) 6V6GT RCA black plate coated glass like new 1940's and NOS 1954 (49ma and 46ma)
(!!!!) (Recommended Pair) 6V6GT Sylvania NOS 1940's (46.5ma and 47.8ma)
(!!!!) (Recommended Pair) 6V6GTA GE NOS 1960's - 1970 (38ma and 40ma) (Fender, Two Rock, Victoria)
(!!!!) (Recommended RCA Single) 6V6G RCA branded Haltron coated glass NOS 1940's (42ma)
(!!!!) (Recommended Single) 12AY7 GE NOS 1960's (2.2/2.5ma)
(!!!!) (Recommended Single) 6V6G Sylvania branded Haltron coated glass NOS 1940's (50ma)
(!!!!) (Single) 6V6GT Sylvania coated glass NOS 1956 (34.2ma)
(!!!!) (Slightly microphonic single) 12AX7=ECC83 Mullard UK branded Philips ribbed plates NOS 1962 (161 Series) (1.0/1.2ma and Gm=1600/1650)
(!!!!) (Tungsol Single) JAN-12AY7 Tungsol like new 1960 era (2.9/2.7ma) (same Gm)
(!!!!) 6V6G Mullard branded Haltron England NOS gray coated glass 1940's (45.5ma)
