small valves

[Gordon JC Pearce]

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.