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mdunn · 06-21-2018, 12:31 PM

I told myself I was only interested in acquiring LED machines (already having an HP15 from the old days). But of course got intrigued by the 28, and now have a clean machine on my desk. Some questions & comments:

1. Is the 2-cell tube supposed to be so tight? I really have to whack the calculator to get the cells out. There's a thin strip of diagonally-applied foam in there causing the problem. Opinions?

2. The 28 seems to be the cheapest "serious" HP calc to be found on eBay...by a long shot. Weirdly interesting. Cheaper than LED calcs. Cheaper than the 32 & 42, both of which I wouldn't mind having, but not at those prices. Is it because it's such an unusual machine?

Yeah, quite the machine... :-} I'm gradually working through the manual. It's more a computer than a calculator. Hints of a BASIC machine, but perhaps closer in spirit to Forth??? With a touch of MathCad...? I haven't got to the programming section yet, so those are just first impressions. Though I did manage to create a counting loop.