While theoretically true there is an important variable that will differ from one table to the next and that is the inertia of the platter. The increase in friction heavy modulation would cause is transient and it takes a certain amount of time to change the rotational speed of the platter depending on how heavy the platter is. Short increases in friction will have little effect on a heavy platter. Longer increases will be countered by a good turntable's drive system. This is the reason most turntable manufacturers use AC synchronous motors. Any slowing of the motor causes an instantaneous increase in torque maintaining platter speed.
fusian, if you want to be accurate about it you have to make a "puck" that fits on the platter's spindle just 2-3" in diameter so that your phone can lie flat over the platter. Then, you have to mark the phone and puck to index the position of the phone so that you are putting it down in the exact same position every time.
fusian, if you want to be accurate about it you have to make a "puck" that fits on the platter's spindle just 2-3" in diameter so that your phone can lie flat over the platter. Then, you have to mark the phone and puck to index the position of the phone so that you are putting it down in the exact same position every time.