The two most common causes of interference are transmitters and electrical equipment. Transmitter interference. Communication systems that transmit signals capable of generating interference include amateur radios, CBs and radio and television stations. Design flaws such as insufficient filtering and inadequate shielding or frayed or corroded.
Willful or Malicious Interference Complaints Section 97.101(d) of the Commission's Rules prohibits amateur operators from willfully or maliciously interfering with or causing interference to any radio communication or signal. 47 C.F.R. § 97.101(d).
Two noise sources are likely to cause interference with a ham radio: electric and electronic. Electric noise is caused primarily by arcing in power lines or equipment, such as motors, heaters, and electric fences. Electronic noise is caused by leaking RF signals from consumer appliances and computers operating nearby. Each type has a distinctive signature, [ ].
B. TWO-WAY RADIO INTERFERENCE. The steps listed below may help you to eliminate TV interference that you experience from CB, amateur or other two-way radio stations. High-pass filters, common-mode chokes (choke filters), snap-together ferrite cores and ac-line filters are available from local electronics and department stores.