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(!!) (slightly microphonic) 12AX7 Sylvania Zenith black ribbed plates "D" getter NOS/80% 1953 (Gm=1300/1400 and 0.9/1.0ma)
(!!) 5842 Raytheon branded RCA NOS 1976 (20ma and Gm=20,000)
(!!) EF80=6BX6 RTC by EI Yugoslavia NOS 1976 (14ma)
(!) (Best Pair 1950's) 5651 RCA NOS 1950's (1 pair)
(!) (Best Value Pair) 0A3 CBS NOS 1960 era same build (neon)
(!) (Pair) 5651 Tungsol branded GE NOS 1965-1966
(!) (READ REVIEW) CV1377=GZ34 Mullard Blackburn UK NOS 1976
JAN-6X4WA Sylvania NOS 1979 (52/40 and 58/40)
