@Adriatic posted:I'd have to guess it is a CW controller with a higher amp capacity needing an external supply because of space. I would expect it to be very similar in general operations, just having more "umph".
I just know the early MTH does best on pure sine, avoid the newer ones until you know more about which chopped/PWave they don't like.
Buy some tvs diodes. Then some magnetic breakers for a PW unit or buy something substantial and new like a Z-4000, ZW-L.
I have an MRC pure power dual transformer but I like the breakers on the 180s better. Plus the conventional operation with the MRC kinda sucks due to the diodes for the whistle and bell.