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(!!!!!) (Best Single 1954) 6V6GT RCA black plate coated glass NOS 1954 (42.5ma) (Fender, Swart, Clark, Victoria, Ampeg, Silvertone amps)
(!!!!!) (Best Single 1967) 12AX7=ECC83 Telefunken Germany <> bottom smooth plates NOS 1967 partially faded printing (1.2/1.5ma and Gm=1600/1800) (EAR, Manley, AKG)
(!!!!!) (Best Single) ECC801S=12AT7 Telefunken Germany <> bottom NOS 1966 (10.8/9.8ma)
(!!!!!) (Best sound for the money) GZ34 Trigon Japan NOS 1970's (59/40 and 59/40) (LS300, Dynaco, Latino, Scott, Marshall, Fender, Cary)
(!!!!!) (Best Value Pair) 6BQ7A RCA black plates NOS "D" getter 1958-1959 (7.6/9ma and 7/9.6ma)
(!!!!!) (Best Value Single 1953) GL-6072 GE 5 star triple mica black plates "D" getter halo 1953 used/tests like new (2.8/3.4ma) (same Gm) (V1 guitar amp, mics, Audio Note)
(!!!!!) (Best Value Single 1953) GL-6072 GE 5 star triple mica black plates "D" getter halo 1953 used/tests like new (3.0/3.6ma) (same Gm) (V1 guitar amp, mics, Audio Note)
(!!!!!) (Best Value Single 1953) GL-6072 GE 5 star triple mica black plates "D" getter halo 1953 used/tests like new (3.2/2.4ma) (V1 guitar amp, mics, Audio Note)
(!!!!!) (Best Value Single) 12AX7=ECC83 Mullard UK branded Philips ribbed plates NOS 1965 (1.0/0.9ma) (163 series)
(!!!!!) (Bets Value Single) GL-6072 GE 5 star triple mica black plates "D" getter halo used/tests like new 1953-1954 faded printing (2.9/2.4ma) (V1 guitar amp, mics, Audio Note)
(!!!!!) (Holland Single) 12AU7 Pope Holland NOS 1971 dimpled disc halo (12/13.4ma)
(!!!!!) (INFORMATION) 6N1 or 6N1P (Best Sounding Substitutes = 6BK7B, 6BQ7A, 6BZ7)
(!!!!!) (Nice Single) ECC82=12AU7 Telefunken Germany <> bottom ribbed plates used/good 1957 (8.5/8.2ma) (strong Gm)
(!!!!!) (Pair) JAN-7308 Sylvania used/good 1975-1976 (10.8/14.8ma and 13.2/12.0ma) (best 6922 substitute)
(!!!!!) (READ REVIEW) 6J5GT Raytheon black ribbed plate NOS 1950 era (9.2ma and 9.2ma) 1-2% matched
(!!!!!) (Recommended Pair) 6C10 GE rebranded RCA NOS 1960's (Ampeg / Fender) (1.0ma/1.2ma/1.2ma) and (1.0ma/1.1ma/1.3ma)
(!!!!!) (Recommended Pair) 6C10 GE rebranded Westinghouse NOS 1970 era (Ampeg / Fender) (1.3ma/1.4ma/1.2ma) and (1.3ma/1.2ma/1.1ma)
(!!!!!) (Recommended Pair) E80CF=7643 Valvo branded Philips Miniwatt SQ NOS 1963 (PREMIUM 6BL8 SUB) (Tuners)
(!!!!!) (Recommended Single) CV4035=M8214=12AX7 Brimar England NOS flying leads 1960's (solder leads into ckt)
(!!!!!) (Recommended Single) CV4035=M8214=12AX7 Mullard England box plates NOS flying leads 1961 (solder leads into ckt)
