IIRC, the A3000D PS has an extra signal not common to other power supplies, even most of the other Amigas don't have it. It is a 60 Hz AC signal (probably low voltage) that I believe was used for timing of the native video on the motherboard (maybe the FF?). I can't remember.
Naturally, the Amigas date to a time before the 3.3 VDC power rail.
I imagine Amigakit is on top of all of this with their adapter.
AFAIK all Amiga PSUs (except for the A4000 PSU) provide a 50/60 Hz Tick signal. However, most (but not all) Amiga mobos have a jumper which selects the Tick or Video blank signal for the system (CIA) timer.
So you can use a generic PSU with these jumper select mobos. The catch is when you switch from NTSC/PAL or to exotic video modes like Super72 then your system timing gets messed up. Also, you can't disable the Video signal with RTG software.
