(!!!!) (READ REVIEW) GB-5931 Sylvania brown base gold brand 1960's (60/40 and 65/40)
(!!!!) (Recommended Pair) 10=VT-25 SYLVANIA NOS 1940's (28.6ma and 29.6ma) (Same Gm)
(!!!!) (Recommended Pair) 27 Philco by Sylvania NOS 1940's (5.5ma and 5.5ma)
(!!!!) (Recommended Pair) 30 Sylvania NOS 1940's (3.0ma and 3.1ma)
(!!!!) (Recommended Pair) 6BQ5 Sylvania black plate NOS 1970 era (63ma and 68ma)
(!!!!) (Recommended Pair) 6DJ8 Philips ECG USA by Sylvania NOS 1987 (13.5/18.5ma and 13.5/19.0ma) 1-3% matched
(!!!!) (Recommended Pair) 6J5GT Raytheon black ribbed plate NOS 1940's (6.4ma and 6.4ma)
(!!!!) (Recommended Pair) 6J5GT Raytheon metal base black ribbed plate NOS 1940's (7.0ma and 7.0ma) (1% matched)
(!!!!) (Recommended Pair) 6L6WGB=5881 Sylvania NOS same build 1980 era (81ma and 84ma) (same Gm)
(!!!!) (Recommended Pair) 6SL7GT Sylvania short bottle chrome top NOS 1953-1954 (2.5/2.4ma and 2.5/2.7ma)
(!!!!) (Recommended Pair) 6SN7GTB Sylvania chrome top gray plates 1950's used/very good (9.6/9.0ma and 8.6/8.2ma) (Gm like new)
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (15.5/16.0ma and 8.4/8.0ma)
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (16.4/16.8ma and 9.2/9.2ma)
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (17.2/17.6ma and 8.4/8.6ma)
(!!!!) (Recommended Pair) 6V6GT RCA black plate coated glass like new 1940's and NOS 1954 (49ma and 46ma)
(!!!!) (Recommended Pair) 6V6GT Sylvania green leaf coated glass NOS 1940's in white boxes (35ma and 37ma)
(!!!!) (Recommended Pair) 6V6GT Sylvania NOS 1940's (46.5ma and 47.8ma)
(!!!!) (Recommended Pair) 6V6GTA GE NOS 1960's - 1970 (38ma and 40ma) (Fender, Two Rock, Victoria)
(!!!!) (Recommended Pair) 7199 RCA black plates NOS 1960's (12/6.6ma and 13.2/7.0ma)
(!!!!) (Recommended Pair) 811A RCA NOS 1954-1959 (55/36 and 56/36)
