small valves - test-drb@ccmp.vtda.org

21 May 2005

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Subject: Re: small valves
   From: Tore S Bekkedal <toresbe at ifi.uio.no>
   Date: Sat, 21 May 2005 18:44:05 +0200
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

On Mon, 2005-04-25 at 13:39 -0400, Allison wrote:
  Good approach.  I enjoy building and winding my
own cores
 be they EI iron or powered iron/ferrite types is part of 
 that. Are these cores suitable for use in making data memories? Ie. could one

No, their characteristics are all wrong. The Cores I refer to are
large by a fact or 15 to as much as 100 time that of cores used for 
memories.

...
 hypothetically make a core store today, using those
cores? Has anyone
done this? Do the current-day cores have better properties for use as
memory than the ones used in past-day cores?  
The past day cores were very optimized material and have not seen
any improvement.  

As to making a corestore today it's still possible but the small 
cores needed to attain a 1-2uS cycles time are not common.

Allison