gofar99 Messages: 1949 Registered: May 2010 Location: Southern Arizona
Illuminati (5th Degree)
Hi, There are a few. One I like is Designing High-Fidelity Tube Preamps by Merlin Blencowe. He has one on guitar preamps as well. I would suggest reading them for concepts first as the math parts can get a bit involved. There is a series of on line texts from the UK that are good. I forget the name at the moment...something Wizard as I recall. Perhaps another member can provide the link. If not I'll go check my archives for it.