(!!!!) (Best RCA Single) 6L6GC Seeburg by RCA black plate tests like new 1965 (69ma)
(!!!!) (Best Value Pair #1) 12AX7A RCA gray ribbed plates NOS 1967-1973 (best tone) (0.9/0.9ma and 0.9/1.1ma) (Fender)
(!!!!) (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 Single) 6L6GC Seeburg by RCA black plate used/good 1961 (66ma)
(!!!!) (Recommended Pair) 6L6GC RCA and RCA Simplex black plate used/good 1960's (61ma and 59ma) (same Gm)
(!!!!) (Recommended Pair) 6V6GTA GE NOS 1960's - 1970 (38ma and 40ma) (Fender, Two Rock, Victoria)
(!!!) (Best Single) 6L6GC RCA Black Plate used/tests like new 1964 (88ma)
(!!!) (Good Value Single) 6L6GC RCA black plate NOS 1965 broken center guide pin (76.2ma)
(!!!) (Recommended Single) 12AX7A RCA gray ribbed plates NOS 1971 (Gm=1600/1800 and 1.2/1.4ma)
(!) (Best Value Single) 6L6GC Sylvania NOS 1960's internals tilted (95ma)
(!) (Recommended Single) 6L6GC Sylvania NOS 1960's (63.5ma)
6L6GC Sylvania clear top NOS 1960's copper grid posts (68ma)
