47 C.F.R. § 97.315 Certification of external RF power amplifiers.
Title 47 - Telecommunication
(a) No more than 1 unit of 1 model of an external RF power amplifier capable of operation below 144 MHz may be constructed or modified during any calendar year by an amateur operator for use at a station without a grant of certification. No amplifier capable of operation below 144 MHz may be constructed or modified by a non-amateur operator without a grant of certification from the FCC. (b) Any external RF power amplifier or external RF power amplifier kit (see §2.815 of the FCC Rules), manufactured, imported or modified for use in a station or attached at any station must be certificated for use in the amateur service in accordance with subpart J of part 2 of the FCC Rules. This requirement does not apply if one or more of the following conditions are met: (1) The amplifier is not capable of operation on frequencies below 144 MHz. For the purpose of this part, an amplifier will be deemed to be incapable of operation below 144 MHz if it is not capable of being easily modified to increase its amplification characteristics below 120 MHz and either: (i) The mean output power of the amplifier decreases, as frequency decreases from 144 MHz, to a point where 0 dB or less gain is exhibited at 120 MHz; or (ii) The amplifier is not capable of amplifying signals below 120 MHz even for brief periods without sustaining permanent damage to its amplification circuitry. (2) The amplifier was manufactured before April 28, 1978, and has been issued a marketing waiver by the FCC, or the amplifier was purchased before April 28, 1978, by an amateur operator for use at that amateur operator's station. (3) The amplifier was: (i) Constructed by the licensee, not from an external RF power amplifier kit, for use at the licensee's station; or (ii) Modified by the licensee for use at the licensee's station. (4) The amplifier is sold by an amateur operator to another amateur operator or to a dealer. (5) The amplifier is purchased in used condition by an equipment dealer from an amateur operator and the amplifier is further sold to another amateur operator for use at that operator's station. (c) Any external RF power amplifier appearing in the Commission's database as certificated for use in the amateur service may be marketed for use in the amateur service. [54 FR 25857, June 20, 1989, as amended at 63 FR 36611, July 7, 1998]
Title 47: Telecommunication
PART 97—AMATEUR RADIO SERVICE
Subpart D—Technical Standards
§ 97.315 Certification of external RF power amplifiers.
