Goto Section: 74.750 | 74.761 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 74.751 Modification of transmission systems.
(a) No change, either mechanical or electrical, may be made in
apparatus which has been certificated by the Commission without prior
authority of the Commission. If such prior authority has been given to
the manufacturer of certificated equipment, the manufacturer may issue
instructions for such changes citing its authority. In such cases,
individual licensees are not required to secure prior Commission
approval but shall notify the Commission when such changes are
(b) Formal application (FCC Form 346) is required for any of the
(1) 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 low power TV, TV translator, and TV booster
stations, or any change which could result in a change in the
electrical characteristics or performance of the station.
(2) Any change in the transmitting antenna system, including the
direction of radiation, directive antenna pattern, antenna gain,
transmission line loss characteristics, or height of antenna center of
(3) Any change in the overall height of the antenna structure, except
where notice to the Federal Aviation Administration is specifically not
required under § 17.14(b) of this chapter.
(4) Any horizontal change of the location of the antenna structure
which would (i) be in excess of 152.4 meters (500 feet), or (ii)
require notice to the Federal Aviation Administration pursuant to § 17.7
of the FCC's Rules.
(5) A change in frequency assignment.
(6) Any changes in the location of the transmitter except within the
same building or upon the same pole or tower.
(7) A change of authorized operating power.
(c) Other equipment changes not specifically referred to in paragraphs
(a) and (b) of this section may be made at the discretion of the
licensee, provided that the FCC in Washington, DC, Attention: Video
Division, Media Bureau, is notified in writing upon the completion of
(d) Upon installation of new or replacement transmitting equipment for
which prior FCC authority is not required under the provisions of this
section, the licensee must place in the station records a certification
that the new installation complies in all respects with the technical
requirements of this part and the station authorization.
[ 28 FR 13722 , Dec. 14, 1963, as amended at 38 FR 6827 , Mar. 13, 1973;
39 FR 38652 , Nov. 1, 1974; 45 FR 26067 , Apr. 17, 1980; 47 FR 21501 , May
18, 1982; 48 FR 41423 , Sept. 15, 1983; 50 FR 23710 , June 5, 1985; 52 FR 31405 , Aug. 20, 1987; 63 FR 33879 , June 22, 1998; 63 FR 36605 , July 7,
1998; 67 FR 13233 , Mar. 21, 2002]
Goto Section: 74.750 | 74.761
Goto Year: 2020 |
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