UK Vintage Radio Repair and Restoration Discussion Forum

UK Vintage Radio Repair and Restoration Discussion Forum (https://www.vintage-radio.net/forum/index.php)
-   General Vintage Technology Discussions (https://www.vintage-radio.net/forum/forumdisplay.php?f=29)
-   -   Geoff Tootill Computer Pioneer (https://www.vintage-radio.net/forum/showthread.php?t=141944)

dave walsh 5th Dec 2017 1:12 pm

Geoff Tootill Computer Pioneer
 
My final "catch up" post here is to flag up an obit for Mr T in today's Guardian.
He's died aged 95 and it is accompanied by a rather good colour photo of the computation device that became known as 'Baby' [complete with valves rack mounted upside down!] He was apparently brought up and educated in Birmingham but born in Chadderton [Oldham] to which he must have returned while working in the Ferranti organisation at one point. It mentions that he built radios as a youngster like many of his contemporaries and progressed through war time Radar Work to developing a computer.

Dave W

ukcol 5th Dec 2017 3:30 pm

Re: Geoff Tootill Computer Pioneer
 
Quote:

Originally Posted by dave walsh (Post 997114)
.........complete with valves rack mounted upside down.....

Great lengths were taken with early thermionic valve based computers to get the maximum reliability out of the valves used. The valves used in Colossus at Bletchley Park were run 24/7 to avoid the failures associated with heating up and cooling down for example. I wonder if the designers thought the valves may be slightly more reliable operated upside down for some reason? It may, of course, simply have been that access to components for servicing and testing was more convenient with the chassis upside down.

peter_scott 5th Dec 2017 5:08 pm

Re: Geoff Tootill Computer Pioneer
 
https://www.theguardian.com/global/2...otill-obituary

https://www.youtube.com/watch?v=6TRfy70DqD8

Peter

Guest 5th Dec 2017 5:22 pm

Re: Geoff Tootill Computer Pioneer
 
Light bulbs (the proper filament type) where designed to run "cap up" to reduce darkening by volatilised tungsten. I would have thought that valves run that way up would be more prone to electrode leaks.


All times are GMT +1. The time now is 10:39 am.

Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.