I've used a different one for That Jam Compressor on the main page.
(
http://tagboardeffects.blogspot.fr/2016/04/that-jam-compressor.html )
It's designed not to create any noise.
A bit more complicated but there are no regulators.
(You can find it at the bottom of this FSB link:
http://freestompboxes.org/viewtopic.php?f=13&t=9287 )