Not meaning to nitpick here,
Well allright. So I'll nitpick.
Couldn't that mention of 100.3 FM be conscrewed as an advertisement ? Even if it * is * for the insular station company itself? You would be using one entity to promote the other.
If it were a test, and a sole gauge of how far the AM signal got out, that meant someone would be at the separate AM transmitter site ; that the two stations most likely would have the capability to split programming, no?
The capacity to ID separately ?