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Re: HP-41 internal upgrade. ????



#3

Hi Daniel,
what can be seen on the picture you linked to is in deed a Speedup circuit. The speed is switched up or down by a combination of two keys. I assume 'User and Alpha' or 'User and Prgm'.
The unit you have was AFAIK never produced commercially.
Regards, Andreas


#4

Thank you very much. Andreas


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