If they are not exactly identical, could that cause a substantial problem?
Unfortunaly the secondaries on both are just two black wires - so I would have
to find out which is which first.
So, if understand correctly since the green line is 180 Deg out of phase with the blue one
(which creates the required + - supply) then the green and blue connected together
cancel each other out - thus creating a ground?
Just to make sure: you suggest that I connect the secondaries in series and the
DMM between green and blue should read 60v.
If I make the mistake and connect them parallel DMM should read 30v.
The primaries should however be connected in parallel.
I maybe saying very stupid things right now, but my knowledge of AC current is close to 0.