PSN-L Email List Message

Subject: Re: Iron source
From: "Randall Pratt" randallpratts@..........
Date: Sun, 3 Sep 2000 19:46:42 -0500

Hi All,

Has anyone tried an ornamental iron shop for wrought-iron?  This is close to
pure iron with silica in the form of slag stringers.  Cast iron on the other
hand will have a high carbon content with the carbon forming small flakes
distributed throughout and causing the gray coloration.  I have a table
showing various cast irons to cantain 1.75 to 4.0 % carbon and wrought iron
as .01 to .08 % carbon.

While I'm on, I have moved and am now operating my long period horizontal in
Mitchell, SD.  It's awfully quiet in comparison to Las Vegas.  Seismically
and citily.


-----Original Message-----
From: barry lotz 
To: PSN-L Mailing List 
Date: Sunday, September 03, 2000 10:05 AM
Subject: Iron source

>   Since it's been so quiet ....  It has been mentioned that iron makes
>a better material for sensor feedback coil transducers than steel. I
>have two questions which maybe someone can help. Do manufactured speaker
>coils have a better grade of material for use in feedback coils? I have
>looked around a little but can't seem to find a source of  iron plate or
>round stock. Any thoughts?
>Public Seismic Network Mailing List (PSN-L)
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Larry Cochrane <cochrane@..............>