In reply to:

Do you think the Tamp can handle 12V 7.5Amps? Since I have a ton of Computer power supplies and one of the rails is 12V 7.5A 200W, i was thinking i could use that to feed into the TAmp. But I am not sure if it can handle it. Does anyone know? THanks.

Just remember that you need a pretty substantial load for an AT/ATX PS to regulate itself (I found out the hard way building my arcade cabinet - used a spare AT PS to power the coin return lights and fans... even now if one of the #45 lamps in the coin returns burns out, it goes below the minimum load and starts doing funky things with the output voltage)

A good starting point is 10% of rated maximum, so you may find you have to "burn off" a bulb or something to reach your minimum load.

Bren R.