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(!!!) (Recommedned Pair) 6B4G Sylvania NOS 1940's, 1 tube rebranded RCA - same build (106mA and 107mA)
(!!!) (Recommedned Pair) 6B4G Sylvania NOS 1940's, 1 tube rebranded RCA - same build (106mA and 107mA)
$ 99.99
1 pair) 6B4G Sylvania black plates NOS 1940's
1 tube) 106ma Gm=6400 Sylvania "L" in Sylvania wiped off glass - white box
1 tube) 107ma Gm=6250 Sylvania rebranded RCA made in 1947 printed in 1950
(6B4G has a 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