Rich, I agree some of the high pricing on the older calcs today is from people looking for one to use, I can vouch for that firsthand, and thanks for your...
I noted that bug on the 35s. I say bug as the E 3 input works on the 33s, along with all other HP calculators I have used. I also feel that a calculator such...
I recently ran across the fact that some relatively early production HP 42S calculators can be put into a "Fast" mode under program control where programs run...
All of the early LED HP calculators seem to have run at similar speeds based on memory and some recent tests I have run. Testing mt HP 65, HP 67 and just...
Can anyone tell me if there are any technical differences between the TI-83 Plus and the Silver Edition of same, or are the differences purely cosmetic?...
Bob Patton
patton@...
Sep 28, 2007 11:33 pm
590
Try Joerg of the DataMath museum he should know. www.datamath.org Rik ... From: "Bob Patton" <patton@...> To: <oldcalcs@yahoogroups.com> Sent:...
Hello, I am trying to restore a Keystone SC-656 calculator from about 1975 (apparently same as the Keystone 2050 plus similar units under the Berkey label)....
Mike, I have a Berkey 4030 which seems almost identical to your Keystone. I've posted pictures of the wiring here: ftp://ftp.bestweb.net/public_html/repairs/ ...
katie10543- Thank you! I was able to download Berkey_4030-1.jpg and Berkey_4030-2.jpg, the latter shows everything I needed. I'm looking forward to testing...
Hi Charlie Do you have a copy of the instruction manual for the Sharp el-512? Is there any way you could copy this for me. Thanks Greg ... have used this...
Quirk #022 Tricky trig functions The Casio fx-300SA has a basic AOS operating system that is much like most of the fx-250 series and like the fx-300v. It has,...
Bob Patton
patton@...
May 22, 2008 2:32 pm
600
_____ I'm busy restoring a Ti SR-52 and having some trouble with the card reader electronics. I't's reading prerecorded cards fine, but is not writing data on...
Hello group, I have a small question about first implementation of the arcsine function in short inscription. Which calculator earliest used the [sin -1]...
Sergei Frolov
frs@...
Jan 30, 2009 5:36 am
602
All the HP calculators used ARC going back to the 9100A in 1968....
I completely misread that, sorry. The 45 was the first HP that used [sin -1] but the 46 -- released on the same day in May, 1 1973 -- continued to use ASN. ...
Thank you for the information about Compucorp! I have learned that in 1971th there is a model with [sin -1] inscription It was "Copucorp 110/X" ...
Sergei Frolov
frs@...
Jan 30, 2009 2:25 pm
605
... The Casio fx-1 had sin, cos, and tan, and though it didn't have a sin -1 key, it did have a tan -1 key. It's not an exact match for what you are looking...
Yippee! Some of you, maybe many, already know this. Try this: <http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/> What you'll see is (or looks like) an FTP...
Great! I downloaded the complete archive, took some time but the PDFs are now safely backedup on my disk :) I liked the articles about HP41 and stuff, from...
On Sun, 01 Feb 2009 22:40:30 -0500, Dejan Ristanovic <dejanr@...> ... You're most welcome! Glad to help. -- Nicholas Bodley /|*|\ Waltham, Mass. A very...
Hi! I have uploaded a video about running Russian calculator RASA with stroboscopic display http://www.youtube.com/watch?v=iCiJS3BU0i4 and also game pack for...
Sergei Frolov
frs@...
Feb 19, 2009 6:08 pm
610
... Fascinating! Probably quite a few people never thought of using such a technique for a calc. display. Showing the displayed numbers with video did not make...
Thank you for the reply. NB> Fascinating! Probably quite a few people never thought of using such a NB> technique for a calc. display. Showing the displayed...
Sergei Frolov
frs@...
Feb 19, 2009 8:16 pm
612
Nicholas Bodley wrote, regarding the Stroboscopic Display on the Russian ... video ... To my knowledge, no other calculator was ever built utilizing this type ...
... I'm less reluctant. I sent him my unwell HP-25 in 2000. he diagnosed it as having a bum power supply. I found another in Europe with a good power supply...
Hello, all, A friend and fellow collector, Gerard Timmerman from the Netherlands, has asked to join this group, but has not received any responses to his...
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