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Please help us to identify this logo from 1973 - Printable Version

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Please help us to identify this logo from 1973 - Joerg Woerner - 05-02-2012

I guess some of you guys are at least sqr(8) years older than I am (born in 1960):

What company is this:

Thanks and Regards,
Joerg


Re: Please help us to identify this logo from 1973 - John B. Smitherman - 05-02-2012

Joerg, is it the Fairchild logo?


John


Re: Please help us to identify this logo from 1973 - Luiz C. Vieira (Brazil) - 05-03-2012

Hi.

I also thought so at first glance, but it is not quite the same. Check this logo (too big of an image to add).

I have already seen this before...




Re: Please help us to identify this logo from 1973 - Raymond Wiker - 05-03-2012

Could be Ferranti... see http://en.wikipedia.org/wiki/File:Ferranti_logo.svg


Re: Please help us to identify this logo from 1973 - Steve Leibson - 05-03-2012

Nope, not the famous Flying F logo of Fairchild, which was a slanted capital F. Here's the best compendium of semiconductor logos I've seen and this logo isn't among those listed:

http://www.classiccmp.org/rtellason/logos/semiconductorlogos.html

It looks like an "F" and a "T" to me. Can't think of a 1973 semiconductor company with those initials.




Not Ferranti - Frank Boehm (Germany) - 05-03-2012




They used a simple "F" before and after 1973.



It seems only Unitrex/Eiko used this type of chip, I have a 1013, 1105, 1106 and #019 listed.


I found this as well: http://calculatorlaboratory.blog119.fc2.com/category4-4.html

Judging by the different housing, these might have been custom made for Eiko.


Caltex? - Steve Leibson - 05-03-2012

According to the following article, Caltex made calculator chips for Eiko in this time period:

The Pocket Calculator Race

I've never heard of Caltex, but that period saw a lot of semiconductor vendors come and go.


Re: Please help us to identify this logo from 1973 - Richard Ottosen - 05-03-2012

Joerg:

What type of chip is it?

Although they were best known for core memory (and the Bi-Tran Six educational computer), I think that Fabri-Tek made solid state memory chips.

For reference, here is a picture with a logo:

http://archive.computerhistory.org/resources/physical-object/fabritek/102643016.lg.jpg


-- Richard


Re: Please help us to identify this logo from 1973 - Joerg Woerner - 05-03-2012

It's a single-chip calculator circuit, we found out that it is the buggiest and weirdest chip ever. Found in the German Privileg 800 and the Unitrex 800k, both manufactured by Eiko in 1973.

Joerg


Re: Caltex? - Joerg Woerner - 05-03-2012

Would make sense - who knows their logo from the Seveties?

Thanks and Regards, Joerg


Re: Caltex? - Matt Agajanian - 05-03-2012

Fascinating and very in-depth article. Thanks. Took a little skim but, later I'll give it a good read.

Thanks Steve


certainly not Caltex - Frank Boehm (Germany) - 05-03-2012

Caltex uses a "CT" logo, the CPUs are named "CTxxxx". However this might be an OEM version done for Eiko, as the "golden legs" are commonly found on Caltex CPUs.


Judging by the article, as it states "Caltex manufactures a chip for Eiko", I'd say we can now be sure that these chips have been made by Caltex for Eiko - none of my Eiko calculators features a Caltex-branded CPU.

(Btw. it's true - the Caltex CPUs are a wicked piece of ****, no wonder, they disappeared from the market so soon...)


Edited: 3 May 2012, 3:13 p.m.


Re: certainly not Caltex - Eric Smith - 05-03-2012

A 1974 chip with the Caltex logo can be seen here.

The style of package doesn't mean much. Lots of semiconductor makers bought packages from the same suppliers.

Edited: 3 May 2012, 4:23 p.m.