johndavis said:
That ID you heard was totally legal.
I know that the 1090 part of "AM 1090" is legal, but the question remains as to whether the letters AM are legal in this context. A frequency is entirely numeric except for the units (usually kHz or MHz for broadcast stations). However, AM consists of letters, not numbers. When you refer to a broadcast frequency as 1090, the kHz is, or can be, implied. Moreover, a broadcast frequency that lacks a decimal point implies AM. Nit picking, you say. For sure! But this rule, like many FCC rules, is all about nit picking and very little else. The FCC should rewrite its rule to say specifically that, if they immediately precede or follow the frequency, the letters AM or FM are acceptable in a legal ID.