HP41 Turbo Modification

[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

[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.

[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

[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

[PoetikBiker]

Does the PPC-Archive still exist, and where can I find it?

[jotne]

You find it here:
http://www.hp41.org/LibView.cfm?Command ... egoryID=14

[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?

[Edited by moderator: unrelated spam link removed.]