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(!!!) (Best Pair) 6B4G Sylvania rebranded GE 1952 separate plates NOS (87ma and 87.5ma) (High Ma and Gm)
(!!!) (Best Pair) 6B4G Sylvania rebranded GE 1952 separate plates NOS (87ma and 87.5ma) (High Ma and Gm)
$ 99.99
1 pair) 6B4G Sylvania rebranded GE 1952 separate plates NOS
1 tube) 87.0ma Gm=6800 branded GE 1955
1 tube) 87.5ma Gm=6850 branded GE 1956
Test Data: Vplate=225V, Vgrid=-30V
(NOS used Ma range 70-90ma)
(NOS used Gm = 4500-5000)
Technical Information
(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 Pair) 6B4G Sylvania rebranded GE 1952 separate plates NOS (87ma and 87.5ma) (High Ma and Gm) "Pin It")