oldcalcs at Yahoo! Groups

Service manual SR-52 wanted

Rik Bos — Wed, 03 Sep 2008 08:15:06 GMT

_____ 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

Calculator Quirk

Bob Patton — Thu, 22 May 2008 14:32:57 GMT

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,

Re: Sharp El-512

pbe43 — Sat, 22 Dec 2007 03:31:53 GMT

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

Sharp instruction manual

pbe43 — Tue, 18 Dec 2007 20:32:52 GMT

Iam looking for a copy of the instruction manual for any Sharp EL-512

Re: Seeking information for Keystone restoration

Michael L. Myrick — Fri, 07 Dec 2007 23:46:26 GMT

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

Re: Seeking information for Keystone restoration

katie10543 — Fri, 07 Dec 2007 18:21:38 GMT

Sorry, here's the correct link: http://www.wass.net/repairs/ ... Keystone. ... point ... 1975 ... board ... between ... have ... a ... or ... it

Re: Seeking information for Keystone restoration

katie10543 — Fri, 07 Dec 2007 18:19:15 GMT

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/

Seeking information for Keystone restoration

Michael L. Myrick — Thu, 06 Dec 2007 23:38:26 GMT

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).

Looking for Casio SL-800

wildpig1975 — Mon, 15 Oct 2007 15:24:22 GMT

Anyone has one or know of one for sale? and how much?

Re: TI-83 Plus

Bob Patton — Sat, 29 Sep 2007 17:01:21 GMT

Well, of course. Thanks Rik, and sorry I bothered everyone.

Re: TI-83 Plus

Rik — Sat, 29 Sep 2007 08:39:19 GMT

Try Joerg of the DataMath museum he should know. www.datamath.org Rik ... From: "Bob Patton" To: Sent:

TI-83 Plus

Bob Patton — Fri, 28 Sep 2007 23:33:08 GMT

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?

Older HP Programmable Calculator Program Running Speeds

Rich Wood — Fri, 14 Sep 2007 06:45:02 GMT

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

HP 42S Fast Mode

Rich Wood — Thu, 13 Sep 2007 17:22:55 GMT

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

Re: HP15C

Rich Wood — Wed, 12 Sep 2007 16:54:45 GMT

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