Re: O.T. Sinclair Scientific Message #7 Posted by Les Bell on 6 Apr 2012, 8:10 p.m., in response to message #1 by Lars Bergström
Oh, yes - I remember it well.
I built mine from the kit (GBP14.95, bought from ETI Magazine, which I later worked for) but couldn't get it working at first. It turned out that TI had supplied a batch of faulty clock chips - I discovered that mine would only work if it was cold enough. So I used to place in the freezer of the kitchen refrigerator, then set to work on my control engineering problems. Once I'd got the required calculations set up with pencil and paper, I would retrieve the calculator and set to work, getting as much done as I could before it warmed up and stopped working. Once the term ended, I shipped it back to be fixed, but only managed a few weeks more before realising I needed an HP.
The major problems were the 9V battery bulge, the three-level stack and - worst of all - the lack of X<>Y, which meant intermediate results often had to be re-entered. But it was a valuable introduction to the joys of scientific calculators!
Best,
--- Les
[http://www.lesbell.com.au]
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