RetroWiki

There are a number of power supplies that Commodore produced for the A500. The A500/A600/A1200 can all use the same power supply. Keep in mind that you may need more juice if your Amiga has accelerator cards or Zorro cards hanging off of it.

I found one A1200 with a full size 3.5“ hard drive shoved inside (see — http://retroninja.net/a1200). They tapped the HDD power off of the FDD. The external FDD did not have enough juice to work. Only so much power can be pulled through any motherboard

• Type1 - Heavyweight PSU manufactured in Germany might also be a 4.5A PSU
• Type2 - Lightweight PSU manufactured in Malaysia

Amiga 500 600 1200 connectors.

• Gauge Opinion - this is a thread I found…
  • Reusing an Amiga case is nice since the five pin plug and cable are already there. However, the wires in that cable are pretty thin, same as in a C128 PS cable… copper is expensive. Commodore got around that by installing a sense” line, the fifth wire in the cable. It provides feedback to the PS board so that when the load on the +5VDC is increased (computer on) the PS feeds out a little more voltage to compensate.
  • The new power module has no such sense line, so I use heavier gauge wire to minimize the voltage drop in the cable.
  • I wonder how those modified Amiga power supplies would hold up when the load is very heavy… when the user has added enhancements such as extra RAM, hard drive and CPU accelerator.
  • I use #16 wire in a 5' cable to feed a C128 and go to #14 for longer runs or to feed an Amiga which I know to be a power hog.