I have 2 totally different toroidal transformers I want to put in series to make 75vac total. I have a decently large toroidal transformer in which I wound many, many turns of 10 gauge wire around. To give some perspective, the hole in the toroidal was about 3 inches wide(above the 120v primary), and there is only about half an inch left. That gave me 40vac. I have a smaller toroidal transformer that has about a 2 inch hole in the middle(also above the primary). The primary’s are likely different and the secondaries will be different. 40vac on one toroidal transformer and obviously 35 on another to achieve 75vac. I would use the same 10 gauge wire, but again, obviously, less turns on the second smaller toroidal transformer. Can I do this without an issue?
In short, can I connect 2 different transformers in series to get their combined voltage?