HP 38C calculator disassembly?
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From: Dave Platt on 27 Oct 2009 19:15 In article <hc7th8$lkp$1(a)news.eternal-september.org>, Charles <charlesschuler(a)comcast.net> wrote: >Seriously, I was amazed at how easy it was to learn and how many keystrokes >it saved with chain calculations. I am retired and have lost track of RPN >... is it available in modern calculators? A fair number of current HP calculator are bi- or tri-lingual - they support RPN as well as algebraic. The HP12C is RPN-only. -- Dave Platt <dplatt(a)radagast.org> AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads!
From: Jeff Liebermann on 27 Oct 2009 20:09 On Tue, 27 Oct 2009 13:00:31 -0500, Peabody <waybackNO784SPAM44(a)yahoo.com> wrote: >Has anyone here ever taken apart one of these calculators? Yes. >My "6" >key is not registering all the time, and I thought I might be able >to clean out the crud in there and make it work again. You're going to have a problem getting the keyboard section apart. The case comes off easily. Two screws in the battery compartment and it breaks open. Watch out for the loose IC's. Take photos if you can't remember the chip directions. The keyboard is held together by melted plastic blobs. Break them off and the keyboard section will come apart, but good luck getting it back together. You're better off immersing the entire assembled keyboard in some alcohol, and hope that the crud will wash away. Eventually, the alcohol (and water) will evaporate. My batting average is about 50%. I've worked over about 4 of the series (HP31,32,33,37,38...). I fixed keyboards on two but also destroyed two others. The ones I destroyed were partially working when I started, and had more dead keys when I was done. >FWIW, I still think these HPs are wonderful. RPN forever! Yep. I have a small collection and still use them on a daily basis. >We don't need no stinkin "=" key. The HP35s has both Enter and "=" keys (although the "=" key is somewhat hidden). -- Jeff Liebermann jeffl(a)cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
From: iws on 27 Oct 2009 23:12 "Peabody" <waybackNO784SPAM44(a)yahoo.com> wrote in message news:2zGFm.11593$86.877(a)newsfe15.iad... |snip | FWIW, I still think these HPs are wonderful. RPN forever! We don't | need no stinkin "=" key. Ah yes, RPN vs. algebraic. Kinda the Mac vs PC wars of the 1970's. Or the Betamax vs. VHS wars of the 1980's.
From: Jeff Liebermann on 28 Oct 2009 02:22 On Tue, 27 Oct 2009 20:12:09 -0700, "iws" <nospam(a)nospam.com> wrote: >"Peabody" <waybackNO784SPAM44(a)yahoo.com> wrote in message >news:2zGFm.11593$86.877(a)newsfe15.iad... >|snip > >| FWIW, I still think these HPs are wonderful. RPN forever! We don't >| need no stinkin "=" key. > >Ah yes, RPN vs. algebraic. Kinda the Mac vs PC wars of the 1970's. Or the >Betamax vs. VHS wars of the 1980's. Yep. RPN is better, but there are many more algebraic calculators. Mac is generally better, but PC's are more common and cheaper. Beta has better image quality, but VHS didn't have a royalty attached and is therefore more popular. Success through mediocrity. -- Jeff Liebermann jeffl(a)cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
From: Reinhard Zwirner on 28 Oct 2009 14:12
Jeff Liebermann schrieb: > [...] > The HP35s has both Enter and "=" keys (although the "=" key is > somewhat hidden). ^^ ^^ Hi Jeff Where? I bought my HP35 in 1974 and haven't found this key till now! Very interested Reinhard |