My 1928 Rogers Batteryless R-200-A console is complete except for a missing Rogers R20 output tube. Can anyone help me out? I would also be willing to go with the equivalents: Kellogg 403 or McCullough 403.
Have a Kellogg 401 and a Rogers that looks the same but I cant see the tube number on it.
If interested I can get it in the shop under the lights and try and confirm if its anR20 or not.