Noise Cancelling Devices

Both the ANC-4 and the MFJ-1026 as well as the discontinued NIR-12 are excellent tools to battle QRN, particularly locally generated noise. I have been able to reduce local noise by 3-20db by using  the ANC-4 at my station especially on 160-40Mtrs. I recommend you read all of the attached articles to see how best to set these up with your rig. VA3CR