[Chris h]

I have been getting a solid 120 hz buzz or hum on all AM radios around here when listening to 1120 kHz, our local 50 kw blow torch. I have been suspecting the compact fluorescents for years, and have been replacing them with the new LED lamps. But even those are causing noise. This evening, while experimenting, I find that some LEDs are worse than others. The cheap “no name” brands are much worse than the more expensive GE brand. But the GEs are still noisy. I am sure this is not surprising to many of you.

On radios that I use regularly, I have been using these small tunable loops, sold by Grundig and others. They have been very effective at nulling out much of the noise when rotated properly.