jaydog said:
The FCC rules for an AM station to use a translator is simple. The translator must be with-in the AM's 2.0 contour of their signal. Also with-in the contour they can get the max of 250watts. If any station is using a translator for repeating a station, the must pull the signal in by a high power antenna and the FCC will set their watts (this doesn’t include noncommercial).
Uh, a few corrections here...
The translator's service area must be confined to the AM station's
daytime coverage area. (is it 2mV/m?, don't have the exact figure handy) That means the translator itself may not be at the very edge of the AM service area -- as the translator's coverage area would extend past that of the AM station.
The FCC doesn't assign powers to stations. (translator or otherwise) The applicant requests a particular power level. If the FCC finds that level to comply with maximum power limits, and to not interfere with any existing stations, they'll grant the request. The maximum grantable power for a translator is indeed 250 watts. However, a translator may be licensed for a lower power if the applicant requests. (for example, if higher power would interfere with some other station on a nearby frequency)
Translators
located outside the coverage area of the primary station must receive the primary station off-air.* Since translators of AM stations must not be located outside the coverage area of the primary, this isn't applicable to them. Translators within the primary's coverage may use any means.
* This is the one provision that doesn't apply to non-commercial stations. Translators of non-commercial stations located outside the primary station's coverage may receive the primary station's signal via means other than off-air, *provided* the translator is owned by the same organization that owns the primary station. But again, this isn't applicable to AM stations, whose translators must be located within the primary's coverage.