IIRC the other brand is Delta. From what I've seen, you can usually identify a Delta PSU from the outside, as having a black power switch and AC inlet. TDKs have white.

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Yes, Delta is the one I was thinking of. I actually have seen at least one Delta with a white switch. They seemed to be used mostly on the later production pizza box machines, so you may have to swap a PSU with a Quadra 605 to get one.