(!!!!!) (Best Tungsram Single) ECC83=12AX7A Tungsram Hungary branded RCA NOS 1970's (Gm=2000/2300) (1.7/1.8ma) (Highest mA and Gm)
(!!!!!) (Best Value Pair) 211 GE NOS 1942-1943 (108ma and 108.4ma)
(!!!!!) (Best Value Pair) 6021 GE 5 Star Rated NOS "D" getter halo 1957 in GE 5 Star Boxes (1-3% matched) (5.0/7.2ma and 4.8/6.6ma)
(!!!!!) (Best Value Pair) 6BQ7A RCA black plates NOS "D" getter 1958-1959 (7.6/9ma and 7/9.6ma)
(!!!!!) (Best Value Pair) 6SN7GTB GE NOS 1955-1964 same build (6.1/6.5ma and 6.0/6.3ma)
(!!!!!) (Best Value Pair) JAN-211 GE NOS 1942 original boxes (109ma and 110.2ma)
(!!!!!) (Best Value Single) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new faded printing (2.9/3.2ma) (mic, preamp, amp)
(!!!!!) (Good Value Pair - for Audio Aero) 6021=CV3986 Mullard UK Mitcham NOS 1969 (4.4/4.6ma and 4.5/4.8ma) (1-3% matched)
(!!!!!) (Good Value Pair) 12BH7A Sylvania gray pinched plates NOS and used 1970 era (7.6/8.0.4ma and 7/7ma)
(!!!!!) (Good Value Single) 12AX7 BRIMAR BVA England narrow ribbed plates like new 1959 (1.0/1.2ma)
(!!!!!) (Holland Single) 12AU7 Pope Holland NOS 1971 dimpled disc halo (12/13.4ma)
(!!!!!) (INFORMATION) 6N1 or 6N1P (Best Sounding Substitutes = 6BK7B, 6BQ7A, 6BZ7)
(!!!!!) (Recommended 5 Star Single) 5751 GE "5 Star" NOS gray plates triple mica "U" getter 1956 (2.1/2.2ma)
(!!!!!) (Recommended Mullard Pair) 6BQ5=EL84 Mullard UK branded RTC England NOS 1971-1978 (45.5ma and 48.0ma)
(!!!!!) (Recommended Pair - for Audio Aero) 6021=CV3986 Mullard UK Mitcham NOS 1969 (4.8/5.3ma and 4.8/5.0ma) (1-3% matched)
(!!!!!) (Recommended Pair 1959) 6DJ8=ECC88 Philips Miniwatt Holland large "O" getter halo NOS 1959 etched section on each tube (18.6/15.4ma and 16.4/15.8ma)
(!!!!!) (Recommended Pair 1960-1965) 12BH7A Sylvania gray oval plates NOS "O" getter (11.5/10ma and 10.5/10ma) (Art Audio, Quicksilver, Octave)
(!!!!!) (Recommended Pair) 12BH7A GE gray oval plates "O" getter 1965-1966 same build (10.0/10.2ma and 12/11ma)
(!!!!!) (Recommended Pair) 211 GE NOS 1943 in tan boxes (112.8ma and 113.8ma) (Highest mA)
(!!!!!) (Recommended Pair) 5U4GB HYTRON NOS 1960 "O" getter halos (56-58/40 and 57-58/40)
