QRM Eliminator

These units take some tweaking to get right once installed. The Aux antenna is the most important bit. You need to make sure this antenna can pick up both the signals you want but also the same noise that you are trying to cancel out from the main antenna. In an ideal world both antennas need to be the same. I use this on CB band for my WebSDR and found best results by using a miniwhip HF antenna as the Auxillary antenna along with the sigma venom vertical as the main antenna, since having two CB antennas isnt practical