How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Question

Accepted Answer

C. Approximately 4 times One S unit is about 6 dB, and 6 dB is about a 4 times increase in power (3 dB doubles it, so 2 x 2 = 4). So power must go up about 4 times to move from S8 to S9.