Sorry, but you are wrong, <br>the Flyback Transformer is the thing that generates the high Voltage that is used to accelerate the electron from the electron gun, its not involved in generating the sawthoot waveform that drives the deflection coils.<br>the Waveform is generated by a oscillator.<br>but in a CRT device are more noise sources, there are (the like you mentioned) the deflection coils with around 15,6khz frequency, on "newer" systems there is the power supply witch is often a switch mode power supply witch uses a non standard frequency to  generate the voltages needed for the audio amplifier/micro prozessors/all the other stuff in the TV.<br>Often the Flyback and the switch mode power supply are not in the hearing frequency range, the thing that you are hearing (or not ;) is the deflection coils.<br>sorry for my bad englisch