The often asked questions:
Is tube amp distortion better than a distortion from a pedal?
If I use the distortion channel on my amp why would I ever need an overdrive or distortion pedal?
What are the differences in tone between distortion pedals, overdrive pedals, cranked tube amps and high gain tube amps?
My DIY Pedal books available here:
https://modyourownpedal.com/collections/books