At 11:37 PM 2/10/2011, Rick Karlquist wrote...
It isn't clear why you need to change to 12V fans. Why not "modern" 120V fans?
The PC market has driven the creation of quiet, low cost, 12V, 80mm fans.
You can get a ball-bearing Pabst 8506N, which is comparable to the original fan, 35 dba noise, 11 Watts, from Mouser for ~$45 shipped.
Or you can get a 12V ball-bearing fan with similar specs, which is 5 dba quieter, and draws 2 W, for $9 shipped. ( http://www.newegg.com/Product/Product.aspx?Item=N82E16811999107 ) You could also get a 12V sleeve-bearing fan @24 dba for $10.
I have no idea how what noise rating the original Pamotor (Pabst) 8500C had.
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