> Have you considered this:  The slug is moving back and forth in the 
> coil
> form.  The slug with the brass ends sliding in a brass tube would 
> make a
> good wear surface.

>From dim memory a brass slug (possibly heel end) extends the release 
time.
Anyone else ?

Only slightly related but interesting - design of a REAL relay :-)

        http://www.britishtelephones.com/ericsson/bulletin/6_42.htm



        Russell 

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