Happy new year! I wanted to ask how I could demag properly the PV76 preamps (the transformers). It seems there's a Studer procedure which consist of running a 30Hz sine, but I would like to know how I should do it with the PV? Coming from 1967, I guess it could be a good thing to do now as they are fully recapped and calibrated. I have a generator, a DMM, a oscilloscope here, and Neutrik Minilyzer. Many thanks!