2pac art Cookies: The main motive for restumping of a home is togive safety against floods. Home owners are encouraged to raise their houses bythe administration so as to remain secure during such disasters. Particularlythe cost of house restumping ishigh since it involves enforce the foundation & raising it well above theground. Read More: The range of frequencies readily available for AM transmission comes from 535 to 1705 kilohertz. There is also the Frequency Modulation or FM technique, in which the frequency - instead of the amplitude - of the second signal is regulated based on the carrier wave. For a better understanding look at the comparison image.