HP 30s screen & brain have been water-damaged, but I enjoyed this calculator
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From: Jeff Liebermann on 14 May 2010 21:08 On Fri, 14 May 2010 14:04:06 -0700 (PDT), Merciadri Luca <merciadriluca(a)gmail.com> wrote: >I have some old HP 30s, and as every HP stuff, I like it. > >The problem is that some strange guy threw water on it when I was at >secondary school. It does not perform correct computations anymore, >i.e. it does not deal correctly at all with powers, but there is also >a screen problem. > >How could I repair it? I can still change the screen, but for the >calculations? Tear them apart and clean the guts with a dry paint brush. It probably has some corrosion damage from the soaking. Also, there are 8ea HP-30s calculators on eBay for an average prices of about $15/ea. -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com jeffl(a)cruzio.com # http://www.LearnByDestroying.com AE6KS
From: Jeff Liebermann on 15 May 2010 13:12 On Sat, 15 May 2010 03:58:41 -0700 (PDT), Merciadri Luca <merciadriluca(a)gmail.com> wrote: >> Tear them apart and clean the guts with a dry paint brush. �It >> probably has some corrosion damage from the soaking. >Done, nothing better. Did you actually take it apart? Here are HP's useless disassembly instructions (for recyclers): <http://www.hp.com/hpinfo/globalcitizenship/environment/productdata/Countries/_MultiCountry/disassembly_calcul_2006813145716.pdf> Try washing it again with CLEAN water to remove any contaminants and salt crud. Use a paint brush for cleaning. Use an air compressor and air gun to blow off as much water as possible. Let air dry for at least 24 hours. Try again. >> Also, there are 8ea HP-30s calculators on eBay for an average prices >> of about $15/ea. >Yeah, I know, but I even have a HP-50g, which is clearly better. That >is not the problem. The problem is that I like(d) this calculator. Yech. It's really an HP relabeled Kinpo calculator. <http://www.rskey.org/detail.asp?manufacturer=Hewlett-Packard&model=HP-30S> There's no exact equivalent but this is close: <http://www.kinpo.com.tw/English/Calculator.htm#sr19d1> This self test might be useful: <http://www.rskey.org/~mwsebastian/selftest/hp_test.htm#hp30s> -- 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: Jeff Liebermann on 16 May 2010 12:53 On Sun, 16 May 2010 09:38:14 -0700 (PDT), Merciadri Luca <merciadriluca(a)gmail.com> wrote: >Okay, you might check >http://www.student.montefiore.ulg.ac.be/~merciadri/hp30s_broken/dsc01473.jpg >(broken board) (...) Your Sony Ericsson K750 cell phone camera has a macro mode for close focus. Please use it. With the flash off, you might also need some more light. <http://www.mobileburn.com/review.jsp?Page=4&Id=1393> If you have a broken trace, just scrape off the insulation with a small screwdriver and tin what's left of the trace with some solder. Then, take a fine wire (one strand from a piece of stranded hookup wire) and solder it over the tinned traces. This does take some practice. Do NOT touch the epoxy mound with the calculator chip under it. Just pushing on the epoxy will break the wire bonds underneath. -- 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: vjp2.at on 29 May 2010 00:15 I love old HP stuff. I still have my HP41C calculator and my HP2621a terminal. ANd they work fine. But I might suggest if your really love the HP RPN, to get a software version for your computer. There is one that has both HP12 financial and HP11 engineering modes by Osvaldo Ramos Tsan Hu, a chemical engineering professor. It works in Portable Apps off my USB fob. - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist http://www.panix.com/~vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- [Homeland Security means private firearms not lazy obstructive guards] [Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]
From: Jeff Liebermann on 29 May 2010 00:25
On Sat, 29 May 2010 04:15:41 +0000 (UTC), vjp2.at(a)at.BioStrategist.dot.dot.com wrote: >I love old HP stuff. I still have my HP41C calculator and my HP2621a >terminal. ANd they work fine. But I might suggest if your really love >the HP RPN, to get a software version for your computer. There is one >that has both HP12 financial and HP11 engineering modes by Osvaldo >Ramos Tsan Hu, a chemical engineering professor. It works in Portable >Apps off my USB fob. Yep. I have one on my iPod Touch: <http://www.creativecreek.com> Also one on my cell phone. None on my computah as I have the real thing handy. In the office, it's an HP35s. At home, it's an HP41cv. I've used algebraic calculators, but I much prefer RPN. More: <http://www.hpmuseum.org/simulate/simulate.htm> <http://www.hp.com/sbso/product/calculators-emulators/usemulator.html> <http://www.hpcalc.org/hp49/pc/emulators/> -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com jeffl(a)cruzio.com # http://www.LearnByDestroying.com AE6KS |