Goto Section: 74.1250 | 74.1261 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 74.1251 Technical and equipment modifications.
(a) No change, either mechanical or electrical, except as provided in
part 2 of this chapter, may be made in FM translator or booster
apparatus which has been certificated by the Commission without prior
authority of the Commission.
(b) Formal application on FCC Form 349 is required of all permittees
and licensees for any of the following changes:
(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 FM translator or FM booster stations, or any change
which could result 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.
(2) A change in the transmitting antenna system, including the
direction of radiation or directive antenna pattern.
(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 change in the location of the translator or booster except a
move within the same building or upon the same pole or tower.
(5) Any horizontal change in the location of the antenna structure
which would (i) be in excess of 152.4 meters (500 feet), or (ii) would
require notice to the Federal Aviation Administration pursuant to § 17.7
of the FCC's rules.
(6) Any change in the output frequency of a translator.
(7) Any increase of authorized effective radiated power. FM translator
and booster stations may decrease ERP on a modification of license
application provided that exhibits are included to demonstrate that the
following requirements are met:
(i) The license application may not propose to eliminate the authorized
horizontally polarized ERP, if a horizontally polarized ERP is
(ii) The installed height of the antenna radiation center is not
increased by more than two meters nor decreased by more than four
meters from the authorized height for the antenna radiation center; and
(iii) The station is not presently authorized with separate horizontal
and vertical antennas mounted at different heights. Use of separate
horizontal and vertical antennas requires a construction permit before
implementation or changes.
(8) Any change in area being served.
(c) Changes in the primary FM station being retransmitted must be
submitted to the FCC in writing.
(d) Any application proposing a change in the height of the antenna
structure or its location must also include the Antenna Structure
Registration Number (FCC Form 854R) of the antenna structure upon which
it proposes to locate its antenna. In the event the antenna structure
does not have a Registration Number, either the antenna structure owner
shall file FCC Form 854 (“Application for Antenna Structure
Registration”) in accordance with part 17 of this chapter or the
applicant shall provide a detailed explanation why registration and
clearance are not required.
[ 35 FR 15388 , Oct. 2, 1970, as amended at 45 FR 26068 , Apr. 17, 1980;
47 FR 24580 , June 7, 1982; 50 FR 3525 , Jan. 25, 1985; 50 FR 23710 , June
5, 1985; 55 FR 50698 , Dec. 10, 1990; 61 FR 4368 , Feb. 6, 1996; 63 FR 33879 , June 22, 1998; 63 FR 36606 , July 7, 1998; 65 FR 79780 , Dec. 20,
Goto Section: 74.1250 | 74.1261
Goto Year: 2020 |
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