HP-41: Question on Halfnut vs Fullnut - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: HP-41: Question on Halfnut vs Fullnut (/thread-23487.html) |
HP-41: Question on Halfnut vs Fullnut - Juergen Rodenkirchen - 10-30-2002 Just a quick question: Does any HP-41C/CV/CX FULLNUT have a separate CPU board and, vice versa then, does any HALFNUT just have a single board? What about FULLNUTs that have been repaired and "became" HALFNUT during that process?
Juergen
Re: HP-41: Question on Halfnut vs Fullnut - Vieira, Luiz C. (Brazil) - 10-30-2002 Hi;
Hope this clarifies.
Cheers.
Re: HP-41: Question on Halfnut vs Fullnut - Juergen Rodenkirchen - 10-30-2002 Hi Luiz! Thanks for the comprehensive answer to my question! And, yes, it helped to clarify things :-)
Juergen
Re: HP-41: Question on Halfnut vs Fullnut - Tony Duell - 10-30-2002 The Fullnuts have a separate CPU/logic board. The keyboard PCB in a Fullnut is just the keyswitches, and the display driver hybrid is soldered to one edge of this PCB. The display driver hybrid is just the display driver. The CPU board contains the CPU chip, ROM, RAM, PSU chip, timer chip (in a CX), and so on. Re: HP-41: Question on Halfnut vs Fullnut - Juergen Rodenkirchen - 10-31-2002 Hi Tony! Thanks a lot for the many additional information. After digesting your input, I think my original question is now fully answered: If I do understand you right, then merely the Fullnuts do have a separate board indeed. Also, thanks for the very interesting information on Halfnut CV vs CX! As for the Fullfnut -> Halfnut conversion: If I don't mix up things, I believe a certain source of information (that I do not remind at the moment) stated that Fullnuts were occasionally converted into Halfnuts by HP service during a repair. However, following your explanation I think that you're indeed right and HP never did this as it would have made no sense, so to speak. Thanks again for your input.
Juergen
Re: HP-41: Question on Halfnut vs Fullnut - Vieira, Luiz C. (Brazil) - 10-31-2002 Hi, Jurgen; in fact, after the fullnut being off-line, any fullnut sent to be repaired by HP was simply "replaced" for a new halfnut. What was somewhat discussed here (at least by me) was the original and rare HP41C in a halfnut version. When the halfnut series were launched, the HP41C was no longer in production. Anyway, some exquisite HP41C in a halfnut case replaced original, non-operating fullnut HP41C's from HP "headquarters". I believe this is a somewhat rare HP41 series model: an original HP41C halfnut. My US$ 0,10 (how much is this in Euro?)
Cheers.
Re: HP-41: Question on Halfnut vs Fullnut - Juergen Rodenkirchen - 10-31-2002 Hi Luiz! I do understand your point. Besides, I do agree with you in that the HP-41C Halfnut probably would be a very interesting collectors item. Btw, 1 Euro is almost the same as 1 US$ (currently 1E approx. 0,997US$ I think). Many thanks for your inputs again ... and a general and sincere "thank you" for your valuable, untired efforts on answering questions and providing help on this great forum :-)
Best wishes, Juergen
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