Good evening, the amperage of the transformer itself is given by the size of the small chopper, it is not useful to change the capacitors for greater capacity, in these sources only the voltage may vary but not the amperage, possibly when you connect the transformer this He tries too hard and the Wi fi device causes the voltage to drop and that is where the device sucks or shrinks the small transformer and that is why it restarts, to avoid having problems I recommend you get one of 800mA or 1A and it would quietly work greetings .