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(!!) (SINGLE) 6BM8=ECL82 Valvo Holland used/good 1960 (1.9ma/34ma)
(!!) (Single) 6F8G Philco by Sylvania parallel plates used/good 1940's (10.2ma and 7.2ma) (close Gm)
(!!) (Single) 6SN7GTB RCA NOS 1958 tilted glass (8.8/9.2ma) (Gm the same)
(!!) (SINGLE) 6U5 RCA NOS Tuning Eye 1976 bright eye
(!!) (Single) UX-120=20 Radiotron used/60% 1920's (4.8ma)
(!!) (slightly microphonic) 12AX7 Sylvania Zenith black ribbed plates "D" getter NOS/80% 1953 (Gm=1300/1400 and 0.9/1.0ma)
(!!) (sold out) JAN-CRC-808 RCA NOS 1943-1945 (strong output)
(!!) (~ Best Value Pair ~) 56 Sylvania test like new 1940's (5.3ma and 5.5ma)
(!!) (~ Recommended Pair ~) 6JD6 GE branded RCA NOS same date codes (13ma and 14ma)
(!!) 12AX7 Sylvania branded Philco NOS 1965 (Gm=2400/2400 and 1.6/1.5ma) 1-3% section balance
(!!) 12SN7GT Sylvania Philco chrome top black plates NOS 1956 (8.2/8.4ma)
(!!) 13D3 Brimar UK black plates tests like new 1962 (6.8ma/7.2ma) (similar to 12AU7)
(!!) 1629 RCA NOS 1961 bright eye
(!!) 180C1=0B2 Mullard England NOS (neon)
(!!) 227 National balloon used/good, rattle inside base 1930 era (5.3ma)
(!!) 45 RCA 1940's used/good (22.6ma) (strong Gm)
(!!) 5963=12AU7 RCA NOS 1963 (9.2/9.6ma)
(!!) 6AN8A GE Great Britain NOS 1970 era (15/12ma)
(!!) 6AN8A Raytheon USA NOS 1960's (13.5/14.5ma)
(!!) 6AN8A Sylvania Magnavox NOS 1972 (14.5/14.8ma)
