Sec.  74.951   Modification of transmission systems.

   

   Formal application on FCC Form 330 is required for any of the
   following changes or modifications of the transmission systems:

   (a) Replacement of the transmitter as a whole, except replacement with
   a transmitter of identical power rating which has been certificated by
   the FCC for use by instructional TV fixed stations, or any change
   which could result in a change in the electrical characteristics or
   performance of the station. Upon the installation or modification of
   the transmitting equipment for which prior FCC authority is not
   required under the provisions of this paragraph, the licensee shall
   place in the station records a certification that the new installation
   complies in all respects with the technical requirements of this part
   and the terms of the station authorization.

   (b) Any change in the antenna system affecting the direction of
   radiation, directive radiation pattern, antenna gain, or radiated
   power; provided, however, that a licensee may install a sectorized
   antenna system without prior consent if such system does not change
   polarization or result in an increase in radiated power by more than
   one dB in any direction, and notice of such installation is provided
   to the Commission on FCC Form 331 within ten (10) days of
   installation. When an applicant proposes to employ a directional
   antenna, or a licensee notifies the Commission pursuant to this
   paragraph of the installation of a sectorized antenna system, the
   applicant shall provide the Commission with information regarding the
   orientation of the directional antenna(s), expressed in degree of
   azimuth, with respect to true north, and the make and model of such
   antenna(s).

   (c) Any change in the overall height of the antenna structure, except
   where notice to the Federal Aviation Administration is specifically
   not required under Sec. 17.14(b) of the FCC Rules.

   (d) Any change in the location of the transmission system except a
   move within the same building or upon the same antenna supporting
   structure.

   (e) A change in frequency assignment.

   (f) A change in the operating power.

   (g) Any addition of receiving locations or to modify such a location
   to a receive and response station.

   [ 45 FR 26068 , Apr. 17, 1980, as amended at  50 FR 26761 , June 28, 1985;
    52 FR 3806 , Feb. 6, 1987;  53 FR 36788 , Sept. 22, 1988;  63 FR 36605 ,
   July 7, 1998;  63 FR 65124 , Nov. 25, 1998;  65 FR 46623 , July 31, 2000]