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Additional Resources

The ARRL recommends the following publications on regulatory and RFI topics:

  • Antenna Zoning for the Radio Amateur by Fred Hopengarten
    Everything you and your attorney need to know to obtain a permit for your antenna support system
  • The ARRL RFI Book
    Your authoritative source for practical RFI solutions.

How to Obtain Copies of FCC Regulations

Part 97 of the Rules can be viewed on the ARRL Web site.

If you have access to the World Wide Web, you can download any part of any section of the Code of Federal Regulations here

A US Government Printing Office product list can be found at this Web site:

The URL for the main FCC Web page is


FCC Letters about RFI

  • The "Pettit letter" was written to ARRL General Counsel Chris Imlay concerning an ordinance in Pierre, SD that sought to regulate interference. It shows that the local governments can't regulate interference since only the FCC can.
  • The "Haller letter" was written by the FCC on behalf of an amateur whose application for a variance that was denied based on possible interference to home entertainment equipment. This letter also states that the higher the antenna, the less potential for interference to home entertainment equipment.
  • The "McNamara letter" which was written to the neighbor of a ham who insisted that the FCC laws on interference were too lenient and should be strengthened. The FCC explained to the non-amateur that the current interference regulations were adequate and should not be changed.
  • The "Smith letter" Re: Ordinance Regulating Radio Frequence Interference

Additional Resources


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