Schubert, I became a fan of Frank Van Alstine when he had the temerity to offer a mod for the ARC SP-3 at a time when Bill Johnson's design talents were considered unimpeachable. How dare he! The fact was, Franks mod "corrected" a few flaws in the design of the SP-3, making it more linear, with less distortion and more accurate RIAA equalization. I sent him a Dynaco PAS2 to put his tube pre-amp design of the 80's into, and it was a good one, at a bargain price.