Homebrew_PCBs

I found the answer to my own question about the definition of gear parameters here:  https://en.wikipedia.org/wiki/Gear

The specifics are in the Nomenclature section

Harvey

 

Here's some gear info:

 < http://www.bostongear.com/products/open/theory.html >

 < http://www.sdp-si.com/products/Gears/Index.php >

Roy