What we really need is a good detailed technical glossary. Maybe if everyone will help to fill in the blanks so to speak, we can build a good FAQ here. It's hard to sort out all the details both technical and subjective. It would be great to have a lits of all the popular terms and topics, along with a technical description, strengths/weaknesses and most importantly a subjective description on what it sounds like, what it offers in terms of musicality.Here is a small list, and there are probably others. Please jump in an fill in the blanks because I think this could be a very useful list.
SET - Single Ended Triode or Single Ended Tube
PP - Push Pull
NFB - No feedback
UL - Ultra Linear
OTL - Output Transformer-Less
DC - Direct Coupled
TC - Transformer coupled
Parafeed - Parallel transformer coupled
What does it all mean? What is the difference between pentodes and triodes in terms of sound? Aren't there other amplifier tube types too?