[RFI] Noise emitted by rotator

[Pete Smith N4ZR]

I've started noticing that on 10 meters my top Yaesu G-1000 rotator has 
begun to emit broadband white noise when the antenna is actually 
turning.  Any ideas what the cause could be?

73, Pete N4ZR
The World Contest Station Database, at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000 and
arcluster.reversebeacon.net, port 7000