Have a boomer 400 that was causing my 50amp switching power supply to make a slight buzzing during modulation into a dummy load. I took two ferrite clamping beads and installed them on the power wires and they buzz like crazy. What would cause this? I noticed that the internal variable cap. in the Boomer has no effect on anything. Nothing touching like solder or flux on the traces. There is swr is 1.7 after the Boomer and the reflect is about 20-30w on a MFJ 826B. I know that these are low quality but, something is going on here.