Just so that we really mix things up, a channel 60 TX (72.990MHz) only transmits at 72.990 MHZ for about 75% of the time (sticks at neutral). The rest of the time it is either at 72.995 for the JR types, and 72.985 for the futaba types.!!!!
According to the excellent writeup at:
http://www.torreypinesgulls.org/Radios.htm , out FM radios use 2 frequencies, the base frequence +5Khz for the Positive shift folk, and base -5KHz for the negative folk.
Go figure.....
gus