Checked all grounds, everything looks tight and getting .01 - .02 ohms on chassis connections. When this started a few weeks ago it was in the right channel and intermittent, small bit of static then would go away for 5-10 minutes but keep coming back. Now, it's constant. The only other thing I noticed was the Aux selector switch light bulb is out. But, it went out awhile back before this issue cropped up.