by Wlodek Mier-Jedrzejowicz Ph.D.
|If you collect HP
calculators actively, not be the sheer force of the fact
that you buy a new one every so often, then you should
think about the sort of collection you plan to build up.
I have already written in an earlier article that trying
to get one of everything is likely to be futile. I
suggested that one alternative is to specialise. How
could you do this?
way is to choose a particular model and try to collect
different types. For example the HP-35 had three
different keyboards, it was made in the USA and in
Singapore, and early models had just the words Hewlett
Packard on the front whereas later ones had the model
number too. Furthermore, early ones had several bugs,
later ones had some of
Another model that is
interesting to specialise in is the HP-41. There are
three basic versions - the HP-41C, HP-41CV and HP-41CX.
Each can be found in the original style, and also in the
"halfnut" style - with a rounded black mask
around the display and with a much simpler internal
layout. There are many different versions of the internal
electronics and programs. There are models made in the
USA and in Singapore. There is even the
"blanknut" - an HP-41 with no function
If you really want to study a model in detail you might find ways to get early prototypes, mock-ups, and production plans from HP. These are VERY difficult to get, but some items, such as detailed documentation, repair manuals, or diagnostic modules, were available from HP if you knew who to ask.
If you decide to
specialise, do choose something which interests you, and
something you can reasonably expect to collect. There is
no point trying to collect many HP-35s if you live in a
country where no-one ever used an HP-35, nor in trying to
build up a comprehensive collection of HP-01 models if
you are not willing to pay more than $5 each! Try to
treat your collecting as fun!
This article is part of the WMJARTS file. This file contains a series of articles written by Wlodek Mier-Jedrzejowicz and published in DATAFILE, the journal of the HPCC. The article was reproduced with permission of the author.
Copyright © Wlodek Mier-Jedrzejowicz Ph.D.