yes, but i will use full 1 tube with 280-330V anode voltage for fender preamp not with low values on regural extra transformer for tube stage only and before it i will add extra gain stages with jfets That my plan
so J-fet (3-4 stages) -> (280-330V loaded full tube preamp) Fender Bassman or twin -> Class D PA
so J-fet (3-4 stages) -> (280-330V loaded full tube preamp) Fender Bassman or twin -> Class D PA