A supply comprises electronic components for converting AC power to continuously pass .on of 220 v to 12 v. it is the chemical capacitors that allow partially redress the current. So when components are low-end, the operation is fair to poor. Advance is not at fault, it is that which produces these components. and that country is China .sell cheap expense of quality .by sold against a fan 3 is correct when it is well lubricated.
