The author is director of engineering, Broadcast Engineering Consultants, and licensee of KCEG(AM) and KJME(AM).
The docket to consider allowing AM booster stations to be permanently licensed should be folded into the discussion of AM revitalization as it is one of the known technologies that can provide improved AM service to the public.
FM station licensees have been allowed to use permanently licensed booster stations to provide improved service to the public for over 30 years. In the case of FM boosters the licensee has been allowed to license a booster anywhere within the primary service area at his own discretion. Recent improvements in technology have allowed true synchronization of both the carrier frequency and the modulation down to the HD digital stream when so desired.
AM licensees have been limited to short term demonstrations of the technology of booster synchronization with no forseeable hope of being allowed to use a licensed booster to serve the public with an improved signal even though the booster technology has been demonstrated multiple times to be functional over the last 30 years in multiple situations.
I have personally designed and installed synchronous boosters involving daytime fill-in of coverage and fill-in of nighttime coverage within the daytime coverage all with excellent results. Each dramatically demonstrated improved area and population receiving service and would have been a long term benefit to the public if the FCC had been willing to license it.
It would appear on the surface that the FCC does not believe that an improved service to the public through the use of booster technology is of interest when it comes to AM broadcasting even though the FCC has announced to the world that AM radio is languishing and in need of revitalization.
Radio World invites industry-oriented commentaries and responses. Send to Radio World.