The revolver, I believe does have a similiar AC synchronous motor but the belt drives the perimeter of the platter rather than a sub platter. So would a DC servo motor be less usceptible to hum with MC? Is there any experience with this? It's an intriguing concept and I believe I can test by unplugging turntable while switched to phono. If hum goes away, than we will know AC synchronous is the culprit. We will try out tonight. Stay tuned for feed back. Thank you Doug for input!