Please help us to identify this logo from 1973



#2

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


#3

Joerg, is it the Fairchild logo?


John


#4

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...

#5

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.

#6

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

#7




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.


#8

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.


#9

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

Thanks and Regards, Joerg

#10

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

Thanks Steve

#11

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.


#12

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.

#13

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


#14

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


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP 15C missing logo ! FORTIN Pascal 16 732 10-02-2013, 08:40 PM
Last Post: FORTIN Pascal
  Identify HP-01 Prototype parts aj04062 3 284 06-11-2013, 09:49 PM
Last Post: aj04062
  HP-80 Financial Calculator (1973) BShoring 3 270 03-25-2013, 11:39 PM
Last Post: BShoring
  Help me identify this calculator? cautiousone 5 307 02-21-2013, 05:43 PM
Last Post: aurelio
  15c logo lucano66 6 325 09-07-2012, 03:08 PM
Last Post: Dallas Osborne
  can you identify this HP97-67 book? Ignacio Sánchez 4 247 06-13-2012, 01:02 PM
Last Post: db (martinez, ca.)
  Best 12C models and how to identify them Timo Labrenz 7 326 04-16-2012, 03:27 PM
Last Post: Guenter Schink
  RPL, Logo and virtual screen Gilles Carpentier 3 221 04-03-2012, 04:00 AM
Last Post: Oliver Unter Ecker
  Can anyone identify these keys? Bruce Larrabee 9 376 10-18-2011, 01:12 AM
Last Post: Thomas Radtke
  15C Logo - Finally done! Dallas Osborne 4 248 06-28-2011, 08:36 PM
Last Post: Greg Dressel

Forum Jump: