Is that always true? I know I hear this pattern sometimes, but I thought
it wasn't necessarily true.

Not i my experience. I have actually heard the controller's transmission stop
midway thru as he was talking to an airplane on another freq....switched to the
freq he was talking to the other airplane on and hear him finish his
transmission.
Most of the time they will broadcast on all the freqs they are working, but not
always.


-John
*You are nothing until you have flown a Douglas, Lockheed, Grumman or North
American*