6B4G Ken Rad coated glass branded National Union NOS 1940's (100ma)
Sorry, this product is sold out!
1 tube) 6B4G Ken Rad coated glass branded National Union NOS black plates 1940's
Test Data: Vplate=225V, Vgrid=-30V
(NOS Ma range 80-100ma)
(NOS Gm = 5200)
(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)