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(!!!!) (Recommended Pair) 6C4C=6B4G Russian NOS 1961-1963 (86ma and 86ma) (one of the best sounding 6B4G ever made)
(!!!!) (Recommended Pair) 6C4C=6B4G Russian NOS 1961-1963 (86ma and 86ma) (one of the best sounding 6B4G ever made)
$ 88.88
1 matched pair) 6C4C=6B4G Russian NOS original boxes 1961-1963
1 tube) 86ma Gm=6500 (1963) small rattle inside base - dried glue particles
1 tube) 86ma Gm=6400 (1961)
Internal construction superior to American made 6B4G
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)
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