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(!!) 7199 RCA Black Plates NOS around 1960 era (9/7.8ma)
(!) (#1 6CW7 Best Single) ECC84=6CW7 Mullard branded Philips Miniwatt Holland 1962 (10.6/11.0ma)
(!) (Best Value Pair) ECC84=6CW7 Ultron East Germany by RFT 1970's 2-3% matched (9.6/11.6ma and 9.0/11.0ma)
(!) (Best Value Single) ECL82 EI Yugo branded RSD Germany in RSD box NOS 1974 (1.7/33ma)
(!) (Good Single) 6SN7GTB Westinghouse USA gray plates "O" getter halo NOS 1961 (8.0/9.4ma)
(!) (Recommended Pair) 6BL7GTA RCA coin-base NOS 1970's (33/35ma and 35/30ma)
(!) (Recommended Single) 6BQ5 Tungsol NOS 1960 era (39ma)
(!) (SINGLE) 6BM8=ECL82 Mullard UK NOS 1960 (2.1ma/26ma)
(!) (SINGLE) 6SN7GT Westinghouse USA black plates NOS 1950 era (6.4/6.8ma)
(!) 5U4G Sylvania rebranded Motorola used/good 1951 (48/40 and 52/40)
(!) 5U4G Windsor by Sylvania used/good 1947 faded getter (54/40 and 56/40)
(!) 8BQ5 Tungsol NOS 1960 era (40ma)
(!) JAN-6384 Tungsol NOS 1972 (72ma)
(1 PAIR) NE-408A Northern Electric Canada NOS 1972-1974 (83/60 and 85/60)
(BEST PRICE) 2C53 National Union NOS (4 for $99.99)
(READ REVIEW) 12AU7 RCA black plates "D" getter mid-1950's used/tests like new (9.8/11.4ma)
(read review) 12AY7 GE branded RCA gray plates "D" getter NOS 1954 (2.3/2.9ma)
(slightly microphonic) 12BH7 GE Zenith NOS "U" getter 1953 (10.0/10.6ma)
12AU7=ECC82 Brimar branded Tronix tall narrow plates used/good 1960 (6.4/7.2ma)
12SA7GT Mullard Holland used/good 1960 (3.8ma)
