The Museum of HP Calculators

HP Forum Archive 13

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Re: HP-21 Circuit Diagram Schematic
Message #1 Posted by Gordon Dyer on 15 May 2003, 2:45 p.m.

Thanks for all of your replies.
I would be interested in some articles which summarise knowledge on a calculator family or model.
If anyone can produce new accurate schematics then please post them!
Best regards to all...

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