(!!!!) (Pair) 6B4G Raytheon NOS 1940's - 1 tube branded Tungsol - same build - separate plates (86ma and 92ma)

1 matched pair) 6B4G Raytheon NOS 1940's - separate plates - same build - 1 tube branded Tungsol - same height 1 tube) 92ma Gm=6100 Raytheon 1940's  1 tube) 86ma Gm=5800 Tungsol 1946       Test Data: Vplate=225V Vgrid=-30V GOOD NOS Ma range 70-90ma GOOD NOS Gm = 5200   Recommended for (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)