The Museum of HP Calculators
HP Forum Archive 19
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|Sinclair Calculator Repair|
Message #1 Posted by John Robinson on 14 July 2010, 8:25 a.m.
Hi All, I know this is not HP related, but I didn't know where else to turn. I am looking for help to repair a Sinclair Cambridge Scientific calculator, can anyone point me in the right direction please ?
Message #2 Posted by Frank Boehm (Germany) on 14 July 2010, 10:24 a.m.,
in response to message #1 by John Robinson
Sorry to say that, but the Sinclair calculators were never constructed to last (nor to work as expected when new) - I'd clean all key and switch contacts and check battery contacts for corrosion or cold solder, too. A really "dead" unit is unlikely, but expect bouncy keys...
Message #3 Posted by John Robinson on 14 July 2010, 9:17 p.m.,
in response to message #2 by Frank Boehm (Germany)
Thanks for the tips Frank, I will try them out. I do agree with you about Sinclair calcs being "a pile of ...", but this one is my wifes from her school days, so I wanted to get it going for her :-)
Message #4 Posted by Palmer O. Hanson, Jr. on 14 July 2010, 10:47 p.m.,
in response to message #3 by John Robinson
I do agree with you about Sinclair calcs being "a pile of ...",
That's a little harsh. Ammong other things the Sinclairs were truly shirt pocket size. No need to speculate on just how big the pockets in Bill Hewlett's shirts really were. And I think that the four volume library of programs for the Sinclair Cambridge Programmable was a impressive work for the time.
I have three. I will suggest one thing. You need to be sure that the 9 volt battery is in good condition. A battery which will run TI-30's, Business Analysts, etc., without a problem will give you fits in a Sinclair.
They are slow by today's standards Two solutions for Gene Wright's addition test are
Sinclair Cambridge Programmable
Code: rcl + 1 = sto gto 00
Sinclair Cambridge Proigrammable
Code: + 1 gto 00
Message #5 Posted by John Robinson on 19 July 2010, 2:09 a.m.,
in response to message #4 by Palmer O. Hanson, Jr.
Thanks for the tip about the battery. I think you're thinking of the Cambridge Scientific Programmable which took a 9V battery. I had one of those, but gave it away :-) The one I actually have now is the Cambridge Scientific (non-programmable), and it's powered by 2 x AA batteries, but taking your advice, I'll make sure they are fresh.
BTW, I have total respect for Clive, and his ideas, just sometimes the implementations lacked the quality they deserve - shame really.
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