• HP 28S - A solution for battery and broken sliding door

    From cordonusa@gmail.com@21:1/5 to Cesar on Sun May 31 15:42:32 2020
    On Monday, August 17, 2009 at 11:30:23 PM UTC-6, Cesar wrote:
    A solution for battery and broken sliding door of the HP-28S

    Advantages
    1. Light weight overall
    2. Easy to find 1.5V cell button
    3. Reduce the force of the springs against the door

    mpshp.com/hp28s/Foto01.jpg
    mpshp.com/hp28s/Foto02.jpg
    mpshp.com/hp28s/Foto03.jpg
    mpshp.com/hp28s/Foto05.jpg
    mpshp.com/hp28s/Foto06.jpg
    mpshp.com/hp28s/Foto07.jpg
    mpshp.com/hp28s/Foto08.jpg
    mpshp.com/hp28s/Foto09.jpg

    My HP-28S Setup

    mpshp.com/hp28s/ProgramHP28S.pdf

    Hello,
    I have an HP 28S that I bought many years ago but I want to give it to my daughter as she goes to college but I need to buy another door like the one you designed. Great idea. Do you have an extra one you can sell me?

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