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Message ID: 1610     Entry time: Wed May 20 01:41:19 2009
Author: pete 
Type: Update 
Category: VAC 
Subject: cryopump probably not it 

I found some neat signal analysis software for my mac (http://www.faberacoustical.com/products/), and took a spectrum of the ambient noise coming from the cryopump.  The two main noise peaks from that bad boy were nowhere near 3.7 kHz.

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