Can a common mode choke be used as a low current mains isolation transformer, if wired as primary/secondary?
You know these tube projects that require low current (tube preamps, receivers etc.
So the problem is the ferrite core and not so much the number of turns?
Cause I have also seen iron core common mode chokes inside computer PSUs. And some have quite a lot number of turns
The big thing about a common mode choke is that it doesnt saturate because the fields of diff mode current cancel out....so it would be strange for them to need an iron core.