OK you guru types,
I have a snappy tube guitar amp put together with a post PI master volume, and I would like to stiffen it up by putting in a negitive feedback loop into the PI. BUT, I distinctly remember reading NEVER put any tone or volume controls after the NFB loop. It makes sense, since the NFB would then not match the signal it is buffering, thus adding some additional unwanted(?) distortion. But I have a vague recollection of seeing this done on existing circuits. Thoughts, comments??
Thanks!!
I have a snappy tube guitar amp put together with a post PI master volume, and I would like to stiffen it up by putting in a negitive feedback loop into the PI. BUT, I distinctly remember reading NEVER put any tone or volume controls after the NFB loop. It makes sense, since the NFB would then not match the signal it is buffering, thus adding some additional unwanted(?) distortion. But I have a vague recollection of seeing this done on existing circuits. Thoughts, comments??
Thanks!!