[Milsurplus] Radioactive OA2 tubes?

[DeWitt Clay]

Yes. That's right. Thoriated tungsten filaments got on the radioactive list a 
while back, hi! Good for emission, hi. I read recently that Thorium is hard to 
get rid of i.e. dispose of safely as a byproduct of mining other minerals like 
the rare earths that are currently in the news in the flap between China and 
Japan. Well, you politicians: we need to make more vacuum tubes. That'll get my 
vote and promote the world's suppy of JAN tubes!
73, DeWitt  N4QNX

----- Original Message ----
From: mac <w7qho at aol.com>
To: WA5CAB at cs.com
Cc: milsurplus at mailman.qth.net
Sent: Sun, September 26, 2010 6:42:17 PM
Subject: Re: [Milsurplus] Radioactive OA2 tubes?

Ran into a warning like that on some JAN 811A tubes a while ago.  
Something to do with the thorium in the filaments maybe?

Dennis D. W7QHO
Glendale, CA

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