On Mon,1/19/2015 11:23 AM, Tom Thompson wrote: > They had several more lights of the same type that were not producing > RFI, so I think it was just a case of a ballast going bad. I've seen exactly that, Tom. It was a CFL that I had in a table lamp. Quiet when new, noisy 3-5 years later. No visible sign that it was failing, only new noise in the radio. 73, Jim K9YC