R. Fry said:It doesn't matter whether or not an AM broadcast band transmitter is certified under Part 15 -- it can still be installed and/or in some cases adjusted so that it is non-compliant with Part 15.
Too bad the circumstance I'm referring to was with an unmodified, commercially manufactured and certified Part 15 transmitter where the operator was visited by an apparently "heavy handed" field agent. The transmitter was installed in a compliant manner associated with Part 15.219 and could not be operator adjusted for excessive field strength. The transmitter, being a Talking House without its associated external ATU, only operated with its included wire antenna.
Field strength under Part 15.219 should be a moot point since there's no field strength limit associated with that regulation. I have acquired FCC documentation under FOIA where they even admit in print the fact that 15.219 does not have any associated field strength limit.
Getting back to the topic at hand, I worked for a small "mom 'n' pop" AM daytimer and I really wonder just how much the FCC helped them in comparison with the corporately-owned competition. They struggled for a decade before throwing in the towel.