302 Noise on Power On

Q: I experience a loud output noise when the mixer is powered up. It blasts the camera audio levels to maximum. The sound is a low thump combined with a much higher "beep" sound. Why?

A: Because it is powered from three AA batteries we have a fair amount of capacitance in the power supply. When the unit powers up these caps charge, causing the brief noise at the outputs. All 302 mixers exhibit this behavior.