(!!) (Best Single) 407A Western Electric NOS 1979 (47/26 and 50/26)
$ 39.99
407A Western Electric NOS "O" getter halo 1979
47/26
50/26
Tested on TV-7D/U
26=65%
(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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 (Best Single) 407A Western Electric NOS 1979 (47/26 and 50/26) "Pin It")