[Hallicrafters] Tube 50L6-GT / S-38D

[Kenneth R. Goodwin, Jr.]

I have a Hickok 6000A tube tester but can't find the settings for the 
audio output tube in the S-38D; specifically, a 50L6.  Any 
recommendations on how one tests this tube other than just seeing if 
it plays in the S-38D?

Ken Goodwin, K5RG