I want to learn more about tubes. Can you point me to books or a course?
While some electronics courses still treat valves as a supplementary subject and there is very little current literature on the subject, we can always look for old literature in used bookstores or bookstores. With luck you can find books and handouts of courses from the 50s, 60s and 70s, where the tube subject was still covered in depth. In our section Tubes we should retrieve all possible literature on the subject and make it available to our interested readers. The possibility of elaborating a short course on the subject is not ruled out. For those who wish to understand the subject in depth there are many downloadable books on the internet in English.
