(!!!) (Best Sylvania Pair) 6B4G Sylvania NOS 1940's same build (92ma and 95ma)
By Tube World
$ 179.99
1 Matched Pair) 6B4G Sylvania NOS 1940's plates connected - same build - springs hold up filament wires
1 tube) 92ma Gm=6100 branded Philco
Test Data: Vplate=225V, Vgrid=-30V
(NOS Ma range 80-100ma)
(NOS Gm = 5200)
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 Sylvania Pair) 6B4G Sylvania NOS 1940's same build (92ma and 95ma) "Pin It")