(!) (Best Single) 407A Western Electric tests like new 1960 (42/26 and 50/26)
By Tube World
$ 29.99
1 tube) 407A Western Electric used/like new "D" getter halo (6039=1960) in white box
42/26
50/26
26=65%
Tested on TV-7D/U
(407A=396A with a 20V filament)
(407B=premium grade 407A with higher Gm and higher plate current specs, 20V Filament)
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