If you are an amateur radio operator who likes to use the HF bands, you may have encountered the problem of automotive noise interference. This is when the electrical system of your car or truck produces unwanted signals that interfere with your radio reception. Automotive noise can be very annoying and make it hard to hear other stations or communicate effectively.
HF Noise Reduction Resources
The truth about ferrites
Much has been said about the importance of applying ferrite clamps, rings and beads to radios and other domestic products to fight QRM.