407B Western Electric NOS 1968 (50/26 and 51/26)
By Tube World
$ 39.99
407B Western Electric NOS (6839=1968) in white box
50/26
51/26
(407A=396A with a 20V filament)
(407B=premium grade 407A with higher Gm and higher plate current specs, 20V Filament)
See more: vacuum tube
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