PSN-L Email List Message

Subject: Re: Passing solar flare geomagnetic shock wave?
From: Ed Thelen ethelen@........
Date: Mon, 12 Jun 2000 17:12:54 -0700

I've heard tales of ovens filled with 
hydrogen (in part to exclude O2 which
is reputed to be an enemy in the 
annealing process) "cooled" slowly
down through the range of 700 degress C.

Live a long and together life  ;-)

  Ed Thelen

CapAAVSO@....... wrote:
> In a message dated 6/12/00 7:01:55 PM Eastern Daylight Time,
> ChrisAtUpw@....... writes:
> << When you bend
>  Mu-Metal, the permeability does decrease a bit.  >>
> ------------------------------------------------------------------------------
> -----------
> High Chris,
>     I want to cut and bend some mu-metal to make a core for a flux gate. I
> have been told the core will need to be annealed to restore its permeability
> or the flux gate won't work very well. Can anyone tell me how to anneal a
> toroidal core about 5 cm in diameter?
> Many thanks,
> Cap
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Larry Cochrane <cochrane@..............>