my question.

Odd harmonics are more common in radio transmission circuits, and their absence indicates the quality of the transmitter circuitry. A formal inspection of an amplitude modulation broadcast transmitter will look in particular at the supression of odd harmonics, as the levels of these can significantly affect reception in higher frequency bands at 3x and 5x the carrier frequency.

Normally , even harmonics cancel each other in the system and the disturbance effect is for the odd one

Islam

eslammourad@hotmail.com

More specifically, even harmonics cancell each other out, as do odd harmonics in multiples of 3. So it's only the odd "non-triplen" harmonics that are problematic.