Books on Tube Rolling


I would like to know if some one could recommend a book on tube rolling. What is using a 12au7 vs.a 12at7? A book that would tell you options for a given tube etc. etc. etc.
qdrone

Showing 1 response by elevick

http://www.tubebooks.org/Books/crowhurst_basic_3.pdf
Crowhurst is legendary with amp builders. I've read this several times.