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skipwink

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Posts: 2
Reply with quote  #1 
Want to purchase 4 channel SD390. Must have ability to monitor and save rpm data. Will accept 2 channel unit if in good shape.

Contact info: skipwink@gmail.com
Walt Strong

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Posts: 889
Reply with quote  #2 
Here is a link to OEM advertisement Circa 1993:
http://www.dataphysics.com/30_Years_of_FFT_Analyzers_by_Sri_Welaratna.pdf

I saw a link to Ebay with a 2-channel unit for sale. There has to be some SD390 units collecting dust somewhere![wink]

Walt
skipwink

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Posts: 2
Reply with quote  #3 
Thanks Walt,

I purchased the one on EBAY but it won't measure or display RPM. Hopefully there is one out there collecting dust that still works.
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