(!!!) (BEST PAIR) JG-6189=12AU7WA GE double mica NOS 1963-1964 (10.2/12ma and 10.2/11ma) Title: JG-6189 GE NOS 1963-1964

1 low noise pair) JG-6189=12AU7WA GE double mica “”O”” getter halo NOS 1963-1964 mil-grade in white boxes

10.2/12ma Gm=2200/2400 (red printing) 1963-1964

10.2/11ma Gm=2200/2300 (green printing) 1964

JG=mil-grade

12AU7 subsititute

5814A=12AU7 GE is also recommended