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

22 May 2005

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Subject: Re: small valves
   From: Gordon JC Pearce <gordon at gjcp.net>
   Date: Sun, 22 May 2005 11:04:17 +0100
     To: General Discussion: On-Topic and Off-Topic Posts <cctalk at
classiccmp.org>

Tony Duell wrote:
  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  

 I would hope not!. To make a core memory you need a magneitcally hard 
 material that will stay magnetised. But for a transformer or inductor, 
 you want a soft (magneticaly) material. 

 -tony 
What about a small steel ring, or washer?

Gordon. 
You would need a large amount of curent, in amps possibly 10s of amps
for that.  Volume of material counts.  Oh, they would be very slow.

Allison