Deep Thought wrote:Right up front: If you are not running at least 5 KW, forget it. If you have more than a 10 mv/m night limit, forget it.
If you have second or third-adjacent neighbors in the area expect interference complaints. If you are running DA you may interfere with yourself off the back side of the pattern.
Since AM IBOC adds nothing to the bottom line the best you can hope for is a few dozen listeners you had anyway buying the radio and possibly talking it up among their social circles. You'll not increase your ratings. It may be cheaper and more effective to buy billboards...you'd get far more exposure.
Unless you plan to give away a few dozen receivers or heavily subsidize them at the local electronics emporium, getting any "HD" receiver penetration will be almost impossible, and if there are FM IBOC stations with multiple streams you may be giving those listeners to them.
AM can sound very good even on crappy radios, but it takes dedication to quality from the source through the ATU. Playing MP3s through a modern digital audio processor almost guarantees disgusting audio. Linking your transmitter with the studio over a Hotline running at 28.8 on a dial-up will give similarly crappy results. There is nothing inherent to AM that mandates awful sound.
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