Batboard

Hi all, I have been using the Impact AC-1 chargers for my GP300, MT 1000, HT 1000 and others and found that they work pretty well for the ni-mh batterys. the problem is they are very dirty noise wise, they use a switching wall wort and it pulses it up . The plug is a two prong which makes it hard to add caps to ground. Has anyone had this problem and is there a fix for this noise?. I happened to walk by with a portable AM radio and it went crazy and you cant hear the noise from the power supply unless its plugged into the charger.any help on this problem will be appreciated. untill I fix these chargers I will have to leave them unpluged except when charging a battery. Thank you. Davie n-3-c-h-u at atlanticbb dot net