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What you are all missing is the rating of the power supply...
It needs to be REGULATED at 12 V.
DO NOT get any power supply that rates it at 12 V 3 amps etc..
What this is reffering is that when loaded down to 3 Amps (Or what ever its rated at) the Voltage being supplied is 12V. BUT if its only drawing 1 amp lets say, then the voltage could be as high as 20 V... So DO NOT USE A UNREGULATED SUPPLY..
Use some noogen..... Why dont you just use that old IBM XT or AT etc computer power supply like i do. I just ripped it out of an old XT and it gives me +5V 20 Amps, +12V 5 Amps, -12V 2 amps.. Perfect, not only 12V but also some other ranges as well as a bonus for those other accesories.
Best of all its regulated..
I use one on my RCX scope.. I wasnt going to pay $100 plus on a supply..
Have fun..
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