So My SO got me an early BDay present of a Gator Pedal board. I wire it all up and the floor is finally clean. Now when I plug a few pedals in the wall warts start to squeal. This isn't from the pedals or amps. this is coming from the powersupply for the pedals. There's nothing new added. same pedals as before, maybe in different order but pretty much the same layout. No oddball(as far as I know) pedals that are centre positive. Most are very low draw simple circuits(think the soniccake or donner type pedals). No strymon 15 knob giants. Anyone encounter this before? as an annoying addendum, I went to show her the problem last night (she's very detail oriented and good at troubleshooting, I'm more of a "G**D*** thing" and turn the amp up louder guy), none of them made a peep. I know after supper when I go down they'll all squeal again. Again, any ideas?