I found the source and a solution to the radio interference problem. The cheap AC wall wart that comes with the anode is creating the noise. The one that came with mine is a V-INFINITY Model:EPS120050.
To fix the problem, I went to the Goodwill ComputerWorks store in Austin and dug through their box of old transformers until I found a nice heavy one with the same output as the V-INFINITY, which is 12V 500mA. I paid $4.50 for a Linksys Model:WD411200500. Problem solved.