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HP41 Turbo Modification
Posted:
Thu Apr 30, 2009 6:47 amby graythornWW
Hi all,
does anybody know how to modify a HP-41cx to the turbo-version? I did it more than 10 years ago, but I forgot how I did it.
All I know is, that I needed a little switch an a little capacitor for the modification.
thanks for your help
Andreas
Re: HP41 Turbo Modification
Posted:
Thu Apr 30, 2009 9:24 pmby jotne
I did it for some of customer back in 1986/86, but I do not remember of it was done.
You need to change a capacitor to one with a smaller one. This can give your up to double speed, but it will eat battery.
You need a dip switch that can switch between original capacitor and the one that gives more speed.
Re: HP41 Turbo Modification
Posted:
Fri May 01, 2009 5:04 pmby wfurlow
I am sure the details are in the PPC archives somewhere. Some people used reed switches and even reed switches that toggle and stay set. It changes the tone frequency also.
Warren
Re: HP41 Turbo Modification
Posted:
Wed May 20, 2009 11:29 amby Olivier
Bonjour,
I have a pdf file wich explain the mod in french.
I can give you if you want. Just send me a private mail with your e-mail adress.
Olivier
Re: HP41 Turbo Modification
Posted:
Mon Jul 23, 2012 12:53 amby PoetikBiker
Does the PPC-Archive still exist, and where can I find it?
Re: HP41 Turbo Modification
Posted:
Mon Jul 23, 2012 5:26 amby jotne
Re: HP41 Turbo Modification
Posted:
Mon Dec 03, 2012 9:30 amby tomjackson
I was looking for something that can switch between original capacitor and the one that gives more speed. But I got little information about that. Now from this thread, I know what hardware is needed for switching. Can anyone help me to find the resource for dip switch?
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