Wallwart proximity to pedals one more possible source of hum/noise

[Processaurus]

Just figured this one out a little while ago, I forget exactly what the configuration was, but I was pulling my setup apart trying to find the source of this awful hum, it was a weird "oh... ok..." moment when I realized the hum I was getting from my pedal setup was due to pedals and cables being physically near the plug strip with all of my pedal ac adapters on it.  It was weird because I noticed the hum got better when unplugging an ac adapter that had nothing to do with any of the pedals, just the interference it made by being in the area could penetrate the pedals aluminum boxes.  It would get better if I stuck my unconnected mu-tron (with a heavy sheet metal chassis) in between the adapters and the pedal setup.  So weird.  Fixed it by moving the adapters a couple feet away from things.  Just when I thought I know something about electronics...  It clicked why audio people love their toroidal transformers and on amplifiers using normal power transformers it is as physically far away from the input as possible.

Just wanted to share that with people that have plug strips mounted right on their pedal boards, you might try moving them and see if you hear an improvement in your noise floor.  If there is, I guess you could keep the plug strip onboard, and fashion a sort of shield/partition/cubicle for it out of some heavy gauge metal.

Switching power supplies (2x 1 spots in this case) didn't cause any hum whatsoever in this case, hidden advertising...

[Paul Perry (Frostwave)]

We'll be seeing a LOT more of this, as switch mode warts become compulsory. A very bad idea, whose time has come.