407A Western Electric NOS 1974 (32/26 and 34/26) Title: 407A

407A Western Electric NOS 1974

32/26

34/26

Tested on TV-7

26=65%

(407A=396A with a 20V filament)
(407B=premium grade 407A with higher Gm and higher plate current specs, 20V Filament)