Well, like the title initially asks, can you really “bulletproof” an Atari AR-II board?  From what I have found on the Internet, and older material like Star Tech Journals, the answer really is no.  Pretty much all sources that mention “bulletproof” and “AR-II” on the same page are only taking about performing the Sense mods, and nothing else.

A small amount of pages mention replacing parts (caps, regulators, etc.) due to their age, but that is not bulletproofing either – that is just a good idea.  But I think I can actually bulletproof it, and maybe other power supplies as well.

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