I need a 1:1 transformer, 25VA 600VAC. I'm not having much luck finding such a thing. It occurs to me that I could take five smaller 1:1 120VAC transformers (like this), series all the primary windings and all the secondary windings, and get the same effect.
It seems to me that this is little different than taking a single multi-winding transformer and connecting its windings in different arrangements. Is this valid? Recommended? Are there problems?