[GreenKeys] Vacuum Tube Computer

[Steve Ripper]

John:

I recently donated some Dekatron tubes for the restoration of the WITCH
computer also known as the Harwell Dekatron Computer located in the UK. If
you look through the photos and the videos in the following links you will
see some of the tape readers they used to load programs into the WITCH. The
first of the videos is very short, but at the very beginning there is a
Teletype of some kind sitting on a table. I have no idea who made the
Teletype or tape readers. Perhaps you and some of the more knowledgeable
folks in the group may know.

Here is the link: http://lightrefrain.net/witch/

Other links for the WITCH:

http://en.wikipedia.org/wiki/WITCH_(computer)

http://www.chilton-computing.org.uk/acl/literature/earlyhistory/p014.htm

http://www.tnmoc.org/126/section.aspx/120

Some videos of the WITCH

http://www.youtube.com/watch?v=sVLXY5mQCEA

http://www.youtube.com/watch?v=mzCfnlIdAug

http://www.youtube.com/watch?v=mFTLvejCjOA

Cheers,
 
Steve Ripper
steveripper at comcast.net
Mobile: 248-787-0705


-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of John Nagle
Sent: Thursday, March 31, 2011 10:06 PM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] GreenKeys Digest, Vol 86, Issue 45

On 3/31/2011 6:52 PM, greenkeys-request at mailman.qth.net wrote:
> On 31 March 2011 19:05,<gil at baudot.net>  wrote:
>> >  Hello folks:
>> >
>> >  Hanno here has an interesting project -- he is designing a relay-logic
>> >  computer, if I understood it correctly the other day when we chatted.
>> >  He is looking to add paper-tape i/o, either 5-level or 8-level. ?I
don't
>> >  know all the details.

    I've done that.  A very long time ago.

	http://www.animats.com/nagle/myfirstcomputer.html

					John Nagle
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