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UX-216-B=Type 81 Rectron by RCA Balloon brass pins used/tests like new 1920's (55/40) (very rare)
6AC7 GM Delco by RCA NOS 1940's (12ma)
(!!) 5V4G RCA branded CBS black plates used/tests like new 1954 (62/40 and 62/40)
6BG6G RCA NOS 1963 (63ma)
6HR6 RCA branded GM Radio NOS 1960's (115/60 and 13ma)
(PAIR) 2E26 RCA branded GL-2E26 GE test like new 1950-1951 (81/44 and 88/44)
6336A RCA used/good 1968 (81/120ma) ***
58 RCA NOS 1940's (68/36)
(!!) (Recommended Pair) 6JS6C RCA NOS and like new 1970's (98ma and 102ma)
6P5GT RCA NOS 1947-1948 (5.0ma Gm=1400)
(!!) (Recommended Pair) 6AG7Y RCA brown bottom NOS 1958-1964 (27.8ma and 28.8ma)
(!!!) (Best Single) ECL86=6GW8 Siemens Germany branded RCA NOS 1964 (1.0ma and 39ma)
(!!!) (Best Pair) 81 ST-19 RCA NOS original boxes 1940's (1 pair)
(1 Pair) 5V6GT GE black plate NOS 1956 (44.5ma and 49ma)
(PAIR) 2E26 RCA used/strong 1949 - 1950's (81/44 and 82/44)
JAN-CRC-6Y6G=VT-168A RCA coated glass used/good/70% early 1940's (42.5ma) tested on amplitrex
7586 RCA Nuvistor NOS 1972 (84/60)
(!!) 6AQ5A RCA NOS 1964 (37ma)
50L6GT RCA used/good horizontal scratch on base 1970's (78/60)
(!!!!) (Single 1950's) 12BH7A RCA branded Westinghouse narrow black plates NOS "U" getter mid-1950's (10.6/7.4ma) (1st series made)
