I just got a nearly new looking HP-91 -- only, since I don't have the ac adapter, I can't tell if it's nearly new working as well. I do have a crummy Radio Shack type adapter that I could try the calc on, except I've been known to kill calculators that way. Is there any way to use one of the RS adapters that's absolutely safe or should I bide my time until I come across some standard HP issue stuff? Thanks, erik
Testing my HP-91
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