Maybe I should have asked the question a little differently. I am in university, for electrical engineering, I understand how to test/characterize most things electrical/electronic, but I do not currently have the tools (at home) to characterize unknown trafos, without counting turns by eye, and measuring wire diameters, air-gaps, et cætera, with my calipers. My question is; Is there a way to tell, from the markings, with what values I am dealing? I have about 100 such trafos, and would like to save time. The don't teach how to read factory markings on machines, in my university (save for motors and generators). Kay? Good.