Re: advise on hp 28s needed Message #7 Posted by John Smith on 4 Apr 2003, 7:30 a.m., in response to message #1 by lokhin
The HP28S (and its former incarnation, the HP28C) is
a truly revolutionary calculator, a milestone in calculator
art, and as such it is immensely valuable for us collectors.
But its value as a daily-use calculator is debatable. It's
got lots of good points, of course, but the bad ones are
truly bad, namely:
1) Many basic functions not directly available, you must
use menus all the time
2) quite big and heavy, it doesn't fit comfortably in the
hand at all
3) the double keyboard is more of a nuisance than a help,
actually, and the flexible connector wears out eventually
4) the battery compartment & door design is a real crime:
either the batteries inside are just too loose, and make
eventual bad contact, so RAM is cleared and you lose all
your programs and data, or else fit inside so tightly that
there's no way you can remove them (specially the innermost
one) before the capacitor discharges, so losing again all
your data.
5) Further, the battery door and its surrounding plastic
is incredibly hard to put in place and breaks extremely
easy, thus making battery replacement utterly difficult,
ending most of the time in memory lost. And of course,
having 32k full of programs and data is next to useless
if you get to lose them and having to re-key them each
and every time you have to change batteries. You'll only
need to do this every few months or so, depending on use, but combined with
the risk of damaging the battery door, thus rendering the
calculator useless, that's just too much.
In other words, from a collector's perspective, get one as
fast as you can, NIB preferably. But for actual use, you'll be best advised to get an HP42S if you can live without graphics, and some 48/49 model otherwise.
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