(!!!) (Best Value Pair) 6B4G Sylvania NOS 1952 same build (76ma and 80ma)
$ 99.99
1 matched pair) 6B4G Sylvania NOS 1952 same build
1 tube) 76ma and Gm=5500 (branded RCA) taller bottle in white box
1 tube) 80ma and Gm=5300 (branded JAN-CHS-6B4G Sylvania) slightly tilted glass in original military style box
Good current range 70-90ma
(6B4G=6.3V filament)
(6B4G is electrically equivalent to 6A3, but 6A3 has UX-4 pin base and 6B4G has 8 pin octal base)
(The best sounding 6B4G are 1940's-1950's: Ken Rad, Tungsol, Sylvania, Raytheon)
See more: vacuum tube
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 (Best Value Pair) 6B4G Sylvania NOS 1952 same build (76ma and 80ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_1cff70a2-903c-4934-b422-eeba33c50955.jpg?v=1692295865){kind=link}
 (Best Value Pair) 6B4G Sylvania NOS 1952 same build (76ma and 80ma) "Pin It")